|
THE MINISTRY OF
LABOUR, WAR INVALIDS AND SOCIAL AFFAIRS
-------
|
SOCIALIST REPUBLIC OF VIETNAM
Independence - Freedom - Happiness
---------
|
|
No.:
67/2008/QD-BLDTBXH
|
Hanoi, December 29, 2008
|
DECISION
PROMULGATING
THE PROCESS OF SAFE TECHNICAL TESTING FOR BOILERS, PRESSURE VESSELS,
REFRIGERATION SYSTEM, GAS CHARGE, PROCESSING SYSTEM, GAS CYLINDERS AND
PIPELINES OF STEAM, HOT WATER
THE MINISTER OF
LABOUR, WAR INVALIDS AND SOCIAL AFFAIRS
Pursuant to the Decree No.186/ 2007/ND-CP
dated 26/12/2007 of the Government stipulating functions, duties, powers and
organizational structure of the Ministry of Labor, War Invalids and Social
Affairs;
Pursuant to the Decree No.06/CP dated January 20, 1995 of the Government
detailing a number of Articles of the Labor Code on occupational safety,
hygiene; the Decree No.110/2002/ND-CP of the Government on amending,
supplementing number of Articles of the the Decree No.06/CP dated 20/01/1995 of
the Government;
Pursuant to the Circular No.04/2008/TT-BLDTBXH dated February 27, the Ministry
of Labor, War Invalids and Social Affairs guiding appraisal and registration
procedures of machinery, equipment, materials with strict requirements on
occupational safety;
At the proposal of Director of Occupational Safety,
DECIDES:
Article
1.
Issuing together this Decision is “The Processes of safe
technical testing for machinery, equipment, materials with strict requirements
on occupational safety” as follows:
1. The Process of
safe technical testing for pipelines of steam, hot water (QTKD 04-2008);
2. The Process of
safe technical testing for the refrigeration system (QTKD 05-2008);
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
4. The Process of
safe technical testing for gas charge, processing system (QTKD 07-2008);
5. The Process of
safe technical testing for gas cylinders (QTKD 08-2008);
6. The Process of
safe technical testing for pressure vessels (QTKD 09-2008).
Article
2.
This Decision take effects 15 days after its publication
in the Official Gazette.
Annulling the
Decision No.2013/2005/QD- BLDTBXH dated December 29, 2005 of the Minister of
Labor, War Invalids and Social Affairs promulgating the Process of safety
technical testing for machinery, equipment, materials with strict requirements
on occupational safety.
Article
3.
Director of Occupational Safety, Directors of Technical
Safety Testing Units of Ministries, Branches and provinces, cities directly
under the Central Government are responsible for the implementation of this
Decision./.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
THE MINISTRY OF
LABOUR, WAR INVALIDS AND SOCIAL AFFAIRS
----------------------
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
PRESSURE
VESSELS - PROCESS OF SAFE TECHNICAL TESTING
QTKD
09 : 2008/BLDTBXH
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
HANOI - 2008
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
PREAMBLE
The Process of safe
technical testing for pressure vessels compiled by the Bureau for Safe Work, issued by the
Ministry of Labor, War Invalids and Social Affairs according to the
Decision No.67/2008/BLDTBXH dated December 29, 2008.
THE PROCESS OF SAFE
TECHNICAL TESTING FOR PRESSURE VESSELS
1.
Scope of application
This process
specifies on the order, procedures of safe technical testing at the first,
regular and irregular time for the pressure vessels to be of the list of types
of machinery, equipment and materials with strict requirements on occupational safety
issued by the Ministry of Labor - War Invalids and Social Affairs.
Based on this
process, the testing agencies apply directly or develop specific, detail process
for each shape, type of pressure vessels but not contrary to the provisions of
this process.
2.
The standards forced to apply
Including the
national technical standards for safety as follows:
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
+ TCVN
6154:1996: Pressure vesels - Safe technical requirements for design, structure,
manufacture, method of testing.
+ TCVN
6155:1996: Pressure vesels - Safe technical requirements for installation, use,
repair.
+ TCVN
6156:1966: Pressure vesels - Safe technical requirements for installation, use,
repair, method of testing.
+ TCVN
6008:1995: Pressure equipment – Weld joint with technical requirements and
checking methods.
+ TCVN
7472-2005: Pressure equipment – Joint weld.
3.
The steps of testing
To conduct a review, safe technical
inspection according to the following steps:
- To prepare
the testing: Item 3.1
- To check
dossier: Item 3.2
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
- To check inside:
Item 3.4
- To check the
capability to bear pressure: Item 3.5
- To check the tightness,
only apply to the
vessels working with toxic and flammable solvent-substance: Item 3.6
- To check
the operation: Item 3.7
Note: The following inspections are
conducted only when the inspection results of the previous step
has been satisfactory.
Before conducting the
search: The safety measures
must be taken, pressure vessels must be cleansed; the inspection
door, door for person to creep into (if any) must be
removed; when having doubt
on technical state of the parts bearing pressure of the
vessel, it need to be removed a part or the
whole of the insulation layer to ensure
to the external, internal examination; the establishment must appoint
a person to witness the search.
3.1. Preparation
of testing
3.1.1. To notify the establishment of the plans and requirements
before implementing the testing of vessels.
3.1.2. To
define and agree on the
safety measures with the establishment before
implementing the testing. To prepare fully the instruments, facilities,
checking equipment used for the testing process.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.2.1. Based on the testing regime
to inspect and review dossier of vessel.
3.2.1.1 When testing the first time, it must consider the following
records:
a, Profile of vessel (including
the norms of fabrication metal, welding metal, strength calculations of pressure
elements; drawing of structure written fully the main size and guidance of the operation,
maintenance and repair …).
b, Factory profile of vessels (including certificates of fabrication metal, weld metal, testing results of weld quality; minutes of trial …).
c, The minutes of the testing of mesurement unit; The minutes of checking ground, anti-lightning, protection device (if any).
d, Profile of installation:
only applies to the
fixed vessel
3.2.1.2 When testing periodically, it must review the following documents:
a, History, testing minutes
and the results of previous testing.
b, Records on the management and
use, operation and maintenance; minutes
of inspection, testing (if any).
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
a, In case of repair: repair design dossiers, minute of acceptance
testing after repair with weld and replacement
of parts under pressure.
b, In case of changing the location of installation: it
needs to be considered to supplement the installation dossier.
c, If, after testing, equipment does not work from 12 months or more, it shall be reviewed dossier as for periodical testing.
Note: For the pressure
vessels having clear origin, but the technical dossier is incomplete, then it must be supplemented.
3.3. Outside
and inside inspection
The outside
and inside inspection is implemented according to the order of steps as follows:
3.3.1. When
searching the indise and outside of the pressure vessels, the following lacks
need to be paid attention to detect:
- The inside and outside cracked, sunken, bloated marks of the pressure vessel; gas leak
trace at the weld, rivet connection,
pipe stopper.
- Status of
sediment, rust, corrosion of metal parts.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
- Technical status of the insulation layer.
- To check
the tightness of the connection details.
- For the location
that is unable to carry out the inside search when
testing, the inspection of
technical conditions must comply
with the technical documentation
of the manufacturers. It must be written clearly in the
documents: the amount needs to be inspected, methods and order of
inspection.
3.3.2. To check the location of installation
of equipment: lighting system; floors,
stairs, racks ... anti-lightening,
ground system (if any).
3.3.3. To check the number and working situation of the accessories.
3.3.4. For vessels that work with the
toxic, flammable substance, it must take measures to remove
air prior to the inspection;
the persons who direct examine must know
clearly the process of common
troubleshooting.
3.3.5. If the
vessel has shell-and-tube,
if having doubt on the technical state in the shell-and-tube
zone, it must be requested to
remove each part or the whole
shell-and-tube.
Note: If it is unable to conduct the inside search due to the structural characteristics
of the vessel, it is permitted to
replace the inside search by hydraulic test with the prescribed
testing pressure and examine the parts that are able to conduct.
3.5. Inspection
of the capability to bear pressure (hydraulic test)
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.5.1. If the vessel has the
structure of many parts working at the level with different
pressures that may be separated and hydraulic test
for each part
3.5.2. It must take measures to restrain
the effects of the course
of hydraulic test to the automatic protection equipment, testing and measurement equipment
and make sure the devices not
be destroyed during the course of testing. In case of unable to implement, it must be isolated or removed for separate
testing.
3.5.3. Solvent-substance and
temperature of testing solvent-substance,
testing pressure, time to maintain pressure as prescribed in the item 3.11 of TCVN 6156:1996 if
the manufacturer has defined higher testing-pressure, it
shall be in accordance with provisions of the manufacturer.
3.5.4. Where there is no conditions
for hydraulic test due to the expansion on the nail bed,
floor or difficulties in drainage; due
to the inner base coat preventing
water, it is permitted to replace
by gas pressure testing (air or inert gas) and
conduct the inspection of the tightness with
soap solution or
by other means, in the process of testing, it must apply the safety
measures prescribed in 3.16
TCVN 6156:1996.
3.5.5. Using reagents and conducting the slow increase of pressure to avoid
sudden dilatation causing damages for the devices to maintain the testing pressure
within 5 minutes
and prohibit the use of hammer. Monitoring, detecting the phenomenon: deformation, cracks ... during the hydraulic
test.
3.5.6. Decreasing
pressure slowly back to the standard pressure, keeping it during the course of
searching. Using hamber for checking at the location that has been doubt, then decreasing
pressure back to (0); recovering the exist (if any) and rechecking the results
that have been recovered.
3.5.7. Valuating
the testing result: It must satisfy the results at least as prescribed in item 3.4.5
TCVN 6154:1996.
3.5.8. In
case vessels are exempted from hydraulic test in accordance with provisions of
TCVN on current safe technique, it must be written clearly in the testing
minute and attached to the hydraulic acceptance test minutes of manufacturer,
installation acceptance test minute (if any).
3.6. Inspection
of tightness (closed test): It is
applied only when required
by technology or the vessels working with toxic and flammable solvent- substance.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.6.2. Detecting the leaks; proposing
the measures for the establishment to recover, handle and
re-check.
3.6.3. Valuating
the testing result: vessels are considered as satisfactory at this testing when
gas leak is not detected.
3.7. Operating
inspection (operating test).
3.7.1. To
check fully conditions enabling the vessels to operate normally.
3.7.2. Based on the process,
coordinate with the establishment sending vessel for
using; consider the normal
working condition of vessels and accessories; the
work of measuring,
protective devices.
3.7.3. When
the vessels work stably, the increase of pressure for checking and the
adjustment of working pressure of the safe valve, the lead seal for the safe
valve shall be implemented (except for the vessels containing the toxic,
flamable solvent-substance).
The safe
valve may be adjusted and sealed lead not at the same of the process of
operation.
Adjustment
value of the safe valve:
+ 0,05 MPa – When
the working pressure allowed up to 0,3 MPa;
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
+ 10% p - When
the working pressure allowed more than 6 MPa.
4.
Handling of testing result
4.1. Making
the testing minute.
4.1.1. Making
the testing minute as the form provided (issued attached herewith) when it is free
from hydraulic test together with the minute referred to the item 3.5.8 of this
process, recording fully contents of the minute. Stating clearly the standards
applied during the course of testing.
4.1.2. Summarize the results of testing into vessel profile (stating clearly full name
of tester, date, month, year of testing).
4.2. Passing
the testing minute
Participants to pass the
minute of testing required
having at least the following members:
+ Owner of
the establishment or person who authorized by owner of the establishment.
+ Persons who are assigned to participate in and witness
the testing.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
4.3. When the
vessel gets the requirements as provided in Item 3, leader of the testing
agency issues the testing result after the testing minute is publicized on site
within 5 days.
4.4. When the
vessel does not get the requirements as provided in Item 3, the steps 4.1 and
4.2 shall be implemented and leader of the testing agency only issues to the
establishment the testing minute, stating clearly the reason that the vessel is
not satisfactory.
5.
The testing cycle
5.1. Inside
and outside search: 3 years per time.
5.2. Inside
and outside search and hydraulic test: 6 years per time.
5.3. Operating
inspection: 1 year per time.
5.4. For tank
lorry and containers containing metal errosion solvent-substance (clo, sulfua,
hidro…), its time limit of periodical search is not less than two years per
time.
5.5. For tank
lorry and containers containing propan-butan and commonly used
solvent-substance, its time limit of periodical search is not less than four
years per time.
5.6. If the
manufacturer provides for a shorter time limit of search, then applying
according to provisions of the manufaturer.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
5.8. The
cases must be conducted the irregular search:
a, When using
the types of vessels that are stopped using from 12 months or more.
b, When
vessels are transformed or removed to a new installation location.
c, When
repairing the bloated, sunken locations or the repair using the welding method
at the major parts of vessel.
d, When
doubting on vessel’s tecxhnical status.
The causes
leading to irregular search must be stated clearly in the vessel profile.
THE MINISTRY OF
LABOUR, WAR INVALIDS AND SOCIAL AFFAIRS
----------------------
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
GAS
CYLINDERS – PROCESS OF SAFE TECHNICAL TESTING
QTKD
08: 2008/BLDTBXH
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
HANOI - 2008
PREAMBLE
The Process of safe
technical testing for pressure vessels compiled by the Bureau for Safe Work, issued by the
Ministry of Labor, War Invalids and Social Affairs according to the
Decision No.67/2008/BLDTBXH dated December 29, 2008
THE PROCESS OF SAFE
TECHNICAL TESTING FOR GAS CYLINDERS
1.
Scope of application
This process of
testing specifies on the order, procedures of safe technical testing at the
first, regular and irregular time for gas, liquefied gas, dissolved gas
cylinders (hereinafter collectively called as cylinder) to be of the list of
types of machinery, equipment and materials with strict requirements on
occupational safety issued by the Ministry of Labour - War Invalids and Social
Affairs.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
2.
The standards forced to apply
Including the
national technical standards for safety as follows:
+ TCVN 6156:1996: Pressure
vessels - Safe
technical requirements for installation, use, repair - method of testing.
+ TCVN 6292:1997: Gas
cylinders - Gas cylinders made of welded steel which may be refilled... (
< 75 bar
capacity from 1 to 150 liters containing compressed
gas, liquefied gas and dissolved gas at the ambient air temperature)
+ TCVN 6294-1997: Gas
cylinders. Gas cylinders made of welded carbon steel – Inspection and
periodical test. (Not applying to the cylinder containing Axetylen and LPG)
+ TCVN 6295-1997: Gas
cylinders. Gas cylinders without welding – Safety
standards and features (capacity from 0,5
liter to 150 liter, not limiting to pressure)
+ TCVN 6008-1995: Pressure
equipment – Weld with technical requirement and method of inspection.
+ TCVN 7472-2005: Pressure
equipment – joint weld.
3.
The steps of testing
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
- To prepare
the testing: Item 3.1
- To check
dossier: Item 3.2
- To check and
handle preliminarily: Item 3.3
- To check outside,
inside: Item 3.4
- To check the
capability to bear pressure: Item 3.5
- To check the tightness
(only apply to the
cylinders containing toxic and flammable solvent-substance; other cylinders at request) Item 3.6
- Note: The following inspections are
conducted only when the inspection results of the previous step
has been satisfactory.
Before conducting the
search: it must prepare fully human resource, tools, equipment, facility
equipped to protect person necessarily, gas cylinder must be sanitized; the
establishment must appoint a person to
witness the search.
3.1 Preparation
of testing
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
+ Testing for
the first time before putting the new cylinders into use: 5% of total cylinders.
+ Testing
periodically or irregularly : 100% of total cylinders.
Note: Implementation
of taking sample for testing at propability 5% of the cylinders must be ensured
the representation for the groups of cylinder of the cylinder lot.
3.1.2 The
cylinder testing may be implemented at the cylinder testing station or at the
establishment requesting for testing:
+ When
implementing testing at the station: to notify the establishment of the testing plans and requirements before
implementing the testing, coordinate with
the establishment for taking sample (the first testing).
+ When
implementing testing on site: as implemented at the station and raising the
requirements for the establishment to arrage the location for testing, the
location for handling odd gas ... to ensure safety and environmental protection.
3.2 Inspection
of dossier
Based on the
regime of testing, dossier for reviewing includes:
- The first testing: profile of
factory, list of cylinder lot.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
- Irregular testing: The previous
testing result, list of cylinders need to be tested, repair dossier.
3.3 Preliminary
inspection and handling
3.3.1.
To check the technical parameters
stamped on the cylinder’s handle or
neck; to compare with the technical
data in the list of cylinders
need to be tested; to remove the cylinders
not belonging to the testing list and
the cylinders with parameters missed or
blurred.
3.3.2.
To conduct visual inspection of the exterior status of each cylinder to remove the one which has abnormal phenomenom so that it is not enough
qualification for normal work, such as bloated, sunken marks; broken handle, broken support; scratched
by deep grooves,
pit, burning, peeled-off
labels...
3.3.3.It must
conduct the handling of odd gas in the cylinders for periodical or irregular testing:
3.3.4.
The cylinders containing inert, inflammable, non-toxic gas may be directly discharged.
3.3.5. The cylinders containing
flammable, toxic gas must be handled inner
odd gas by the way of discharging, exshausting air by
specially used equipment, later, air may be withdrawed
for use or with safe handling measures, not directly discharged into the environment.
3.3.6. After the inner odd gas has been
handled all, valve in the cylinder’s top
shall be taken by specialized tools and equipment.
3.3.7.To
check the tightness of valves and the safety parts (if any); to remove
unsatisfactory valves.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.4 Inside
and outside inspection
The inside
and outside inspection is implemented according to the following orders:
3.4.1. To check the status of the
surface, welds, threaded neck, support, handle.
3.4.2. To check the volum for molded,
moulded cylinders and for cylinders in accordance with provisions
of the manufacturers and compared
to the volume of factory.
3.4.3. For welded steel cylinders (LPG ...) that the manufacturer specifies on inspection of
volume, the provisions of the manufacturer shall be applied.
3.4.3. To check the inside of
cylinder by specialized flashing device to valuate status of the metal surface, the weld surface.
3.4.4. For
cylinders having foam, the quality of foam shall be tested in accordance with
guidance of the manufaturer.
3.4.5. To
remove the cylinders that are unsatisfactory.
3.5 Inspection
of the capability to bear pressure (hydraulic test)
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
+ To refill
fully reagents.
+ Testing pressure must be determined
in accordance with provisions of the manufacturer
countersunk at the appropriate position
on the cylinder.
+ The time to maintain testing pressure
is kept within a
period of long enough time to
determine the capability to bear pressure of the cylinder according to the provision of manufacturer.
+ The
increase and decrease of pressure must be implemented slowly so that it shall
not make sudden expansion affecting the sustainability of the cylinders.
+ For
cylinders containing foam or testing by liquid not allowed, then testing by
compressed gas, inert gas shall be implemented; when testing by gas, it must
comply with the minimum safety conditions according to provisions in 3.15, 3.16
TCVN 6156:1996.
+ The volume expansion testing of cylinder:
applied to the form of regular or irregular testing of each type of cylinder, the permanent
expansion of the cylinder is expressed by percentage of total expansion volume at the testing pressure and not exceeding
10%. If this
value is exceeded, the cylinder must be removed (provided in
11.2 TCVN 6294:1997).
3.5.2. For
molded, moulded cylinders:
3.5.2.1.To
implement as provided of the step 3.5.1. If the manufaturer provides for the
standard of removing higher, it shall comply with the manaufacturer’s standard.
Seperatly, it shall not be less than one minute for the time to maintain
testing pressure in every case.
3.5.2.2. Based on the volume increase or
the volume decrease of the cylinders to reduce its working pressure or remove them in accordance with
provisions in 4.10 TCVN 6156:1996,
if the manufacturer's specified standard is higher, such standard shall be applied.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.5.4. To insert checked valves into the cylinders with the satisfactory testing results.
3.6 Inspection
of tightness (tightness test)
3.6.1.To
refill compressed gas or inert gas into the cylinder up to the pressure in
accordance with provisions of the applicable standard or the manufaturer’s
provisions.
3.6.2.
To check tightness of connectors, valve joints ...of the cylinder with
soap bubble or in
the dedicated sealed testing
tank. The cyliders
that are leaked must be handled and retested.
3.6.3. When
the testing cylinders are satisfactory, the discharge of
air, the drying of cylinders’ outside,
degerating and aeration of protection
shall be implemented (as required).
4.
Handling of testing result
4.1.
The testing cylinders are satisfactory without the expression reducing
the ability to work and during the trial test; they does not arise the unusual phenomenon.
4.1.1.The
testing agency stamps its seal and date, month, year of following testing into
the cylinder in compliance with size and location as provided (14.4b TCVN
6294:1997 or 4.2 TCVN 6156:1996).
4.1.2.On the
cylinder being reduced working pressure, the new data on volum and working
pressure must be stamped countersunk seal. The new data must be erased by
stamping cross.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
4.1.4.To make
testing minute: The testing minute is made in accordance with form (issued
attached herewith). To record fully the testing result, comments and
requirements for the using establishment. To state clearly the standards
applied during the course of testing.
4.1.5.To
grant the testing result, testing minute to the using establishment.
4.2.To
coordinate with the establishment to handle the removed cylinders in the steps
implemented in the Item 3 according to provisions of the applicable standard.
5. Testing
cycle
5.1.For the
cylinders containing normal gas: to chect overall every 5 years.
5.2.For the
cylinders containing toxic, metal errosion gas (Chlorine,
hydrogen sulphide, chloride Metin, Photden,
Anhydric sulfur dioxide, hydrogen chloride .....): to
check safety overall every 2 years.
5.3. When the
manufacturer provides for a testing cycle shorter than the above mentioned
testing cycle, the testing cycle of manufaturer shall be applied.
5.4.When
shortening the testing cycle, the tester must state clearly the reason in the
testing minute./.
THE MINISTRY OF
LABOUR, WAR INVALIDS AND SOCIAL AFFAIRS
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
GAS
CHARGE PROCESSING SYSTEM - THE PROCESS OF SAFE TECHNICAL TESTING
QTKD
07: 2008/BLDTBXH
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
HANOI - 2008
PREAMBLE
The Process of safe
technical testing for pressure vessels compiled by the Bureau for Safe Work, issued by the
Ministry of Labor, War Invalids and Social Affairs according to the
Decision No.67/2008/BLDTBXH dated December 29, 2008
THE PROCESS OF SAFE
TECHNICAL TESTING FOR GAS CHARGE, PROCESSING SYSTEM
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
This process
specifies on the order, procedures of safe technical testing at the first,
regular and irregular time for gas, liquefied gas, dissolved gas processing
systems (or storage) (hereinafter collectively called as gas charge, processing
systems) charging into vessels, cylinders to be of the list of types of
machinery, equipment and materials with strict requirements on occupational
safety issued by the Ministry of Labour - War Invalids and Social Affairs.
Based on this
process, the testing agencies apply directly or develop specific, detail
process for each shape, type of gas charge, processing systems but not contrary
to the provisions of this process.
2.
The standards forced to apply
Including the
national technical standards for safety as follows:
+ TCVN 6153,
6154,6155 and 6156:1996: Pressure vessels - Safe technical
requirements for design, structure, fabrication, installation, use, repair and
method of testing.
+ TCVN 2622:1995: Fire protection for house and
work - Design
requirements.
+ TCVN 4245:1996: Safe
technical standards in production, use of oxygen,
acetylene.
+ TCVN 6290:1997: Gas
cylinders. Permanent gas cylinders – inspected at the time of charging gas.
+ TCVN 6713:2000: Gas
cylinders - Safety operation.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
+ TCVN 6008:1995: pressure
equipment – Welds: Technical requirements and method of testing.
3.
The steps of testing
To conduct a review, safe technical
inspection according to the following steps:
- To prepare
the testing: Item 3.1
- To check
dossier: Item 3.2
- To check outside,
inside: Item 3.3
- To check the sustainability,
tightness: Item 3.4
- To check the operation: Item 3.5
- Note:
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
+ The following inspections are conducted only when the
inspection results of the previous step has been satisfactory.
3.1 Preparation
of testing
3.1.1. To notify the establishment of the plans and requirements
before implementing the testing of gas charge,
provessing system.
3.1.2. To
define and agree on the
safety measures with the establishment before
implementing the testing. To prepare fully the instruments, personel
protective facilities, checking equipment used for the testing process.
3.1.3 To
check the personel protective, rescue facilities for the testing process.
3.2 Inspection
of dossier
Based on the testing regime
to inspect and review records of the gas charge, processing system
3.2.1 When
implementing the first testing, it must consider the following dossiers:
a, Profile of factory, profile of the gas charge, processing
system; drawing of working principle of
the system, structure drawing of
pressure equipment in the system;
and guidance of operation, maintenance; certificates of quality inspection of fabrication metal,
weld metal, welds.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
c, The process of checking the cylinders before filling,
the process of filling; records of fire protection.
d, Testing card of instrument unit;
anti-lighting, ground checking minute; checking minute of
protection equipment (if any).
3.2.2 When
implementing the regular testing, it must consider the following dossiers:
a, Profile,
testing minute and output card of the previous testing.
b, Operation log book, monitoring book of repair and maintenance;
minute of inspection, examination
(if any).
3.2.3 When
implementing the irregular testing, it must consider the following dossiers:
To consider dossier as for
considering regular testing and
consider the supplementation of repair dossier, inspection
minute for repair quality, changes.
Note: When
implementing the inspection, dossier of the gas charge, processing system must be
prepared fully
and in
accordance with provisions of Regulation, TCVN on current safety techniques.
If
it is not
assured,
the establishment must have
the additional remedies.
3.3 Internal
and external inspection
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.3.1. To
check for determination of technical status of the devices in the gas charge,
processing system in accordance with the current
safe technical Regulation.
3.3.2. The
inside, outside inspection of the pressure vessels in the gas charge,
processing system
must comply with “Pressure vessels – The process of safe
technical testing”.
3.3.3. Before
conducting the uncasing,
inspection of inside parts of the gas
charge, processing system,
it needs to determine firmly that the equipment is no longer the odd pressure
and concentration of toxic and explosive substances
within the allowed scope.
3.3.4. To pay
attention to check the cracked, sunken, floated, rusty marks, abnormal
phenomenom on the parts, details of the gas charge,
processing system.
3.3.5. To inspect and valuate the
safety status of the accessories, testing
measurement unit. Specially, pay attention to the testing equipment of filling level for liquefied gas.
3.3.6. To
check the pineline system, solvent-substance joint tube on the conditions of durability, layout,
installation upon standard.
3.3.7. To check the tighten details
worn, losen, joints
and insulation parts.
3.3.8. To check valves, control valves on the
number, category and the installation location upon standard as well.
3.3.9. To check the number of
safety valves and other safety protection structures of the
system must be ensured upon the
requirements of the standard.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.3.11. To check the cooling system for the
filled cylinder (if any). To check the filling system and the details
of tightening, keeping cylinders during the course of
filling; to check the inspection system and to determine the amount of gas filled.
3.4 Inspection
of durability, tightness
3.4.1.The
pressure testing durability, tightness; testing solvent-substance; time to
maintain the pressure testing durability, tightness for the gas charge,
processing system must be complied in accordance with provisions of the
manufacturer.
3.4.2.For the
acetylene charge, processing system, the oxygen charge, processing system: pressure
testing durability, tightness; testing solvent-substance; time to maintain the
pressure testing durability, tightness is implemented upon item 7 of TCVN
4245:1996.
3.4.3.It must
have the measures to control the impact of the over-pressure protection
equipment and ensure such equipment not to be destroyed during the course of
testing. In case unable to implement, it must be isolated or assembled for
seperate testing.
3.4.4. The
increase, decrease of pressure during the course of testing must be conducted
slowly, ensuring not to cause expansion suddenly affecting the equipment in the
system.
3.4.5.To
recover the impact of the over-pressure protection equipment; to increase the pressure back to check the
impact and working pressure of the safety
valve.
3.4.6. Valuating
testing result: The system is considered as satisfactory of this testing step
when the equipment, pipeline in the system has not got the phenomenom of deformation,
cracking or leakage of testing
solvent-substance during the course of testing.
3.4.7. In
case the gas charge, processing system is exempted from hydraulic test
according to provisions of TCVN on current safety technique, it must state
clearly the reason in the testing minute and attatch the testing minutes of
factory of the technical council of manufacturer.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
It must test
the capability of operation of the gas charge, processing system according to
the following orders:
3.5.1. Based on the process of requesting the
establishment putting the gas charge, processing system into use.
3.5.1. To
check operation of the gas charge, processing system to ensure the design
parameters.
3.5.2. To
check the impact value of automatic equipment; safety valve of the degree of
compression on the compressor; safety valves of the gas admittance are adjusted
with the opening pressure according to provisions of the manufacturer. Safety
valves of admittance must be sealed.
3.5.3. Valuation
of testing results: The system is considered as achieving results while
ensuring the working parameters in accordance with provisions of the
manufacturer.
4. Handling
of testing result
4.1. Making
testing minute.
4.1.1. Making
testing minute upon the provided form (issued attached herewith) attached the
minute of hydraulic test reffered to in 3.4.9 of this process (as the hydraulic
test is exempted), stating fully the contents of the minute. Stating clearly
the standards applied during the course of testing.
4.1.2. Stating
briefly the result of testing into the profile of the system (stating clearly
name of tester, date, month, year of testing).
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
Participants to pass the
minute of testing required
having at least the following members:
+ Owner of
the establishment or person who authorized by owner of the establishment.
+ Persons who are assigned to participate in and witness
the testing
When the
minute is passed, the tester, attandants to witness, owner of the establishment
together sign; the owner of the establishment seals onto the minute.
4.3. When the
gas charge, processing system gets the requirements as provided in Item 3,
leader of the testing agency issues the testing result and the testing minute to
the establishment.
4.4. When the
system does not get the requirements as provided in Item 3, the steps 4.1 and
4.2 shall be implemented and leader of the testing agency only issues to the
establishment the testing minute, stating clearly the reason that the gas
charge, processing system is not satisfactory.
5.
Cycle of testing
5.1. For type
of metal non-corrosive gas charge, processing system:
5.1.1. To
implement all testing steps (except for durability test): 3 years/time.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
5.2. For type
of metal corrosive gas charge, processing system: the cycle of testing is
according to provisions as item 5.1 but reducing 1/3.
5.3. For type
of toxic, metal corrosive gas charge, processing system (Chlorine, hydrogen sulphide...):
To implement all testing steps: 2 years/time.
5.4. When
manufacturer stipulates the cycle of testing shorter than the provisions of the
above mentioned cycle of testing, the manufacturer’s provisions shall be
applied.
5.5. When
shortening the cycle of testing, tester must state clearly the reason in the
testing minute.
5.6. The
cases must be conducted irregular testing:
- After being
repaired, the system was welded the parts of bearing pressure.
- The
location of installation has been changed.
- The system
han been terminated its operation from 12 months or more.
Note: When
replacing the pipes (made in the form of quick assembly), pressure vessels in
the system that the parts have been tested for factory not exceeding 12 months
are not required to try durability for the whole system.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
--------------------
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
PIPELINES
OF STEAM, HOT WATER - THE PROCESS OF SAFE TECHNICAL TESTING
QTKD
04 : 2008/BLDTBXH
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
HANOI - 2008
PREAMBLE
The Process of safe
technical testing for pressure vessels compiled by the Bureau for Safe Work, issued by the
Ministry of Labor, War Invalids and Social Affairs according to the
Decision No.67/2008/BLDTBXH dated December 29, 2008
THE PROCESS OF SAFE
TECHNICAL TESTING FOR PIPELINES OF STEAM, HOT WATER
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
This process
specifies on the order, procedures of safe technical testing at the first,
regular and irregular time for the pipelines systems of steam, hot water
(hereinafter collectively called as pipeline systems) to be of the list of
types of machinery, equipment and materials with strict requirements on
occupational safety issued by the Ministry of Labour - War Invalids and Social
Affairs.
Based on this
process, the testing agencies apply directly or develop specific, detail
process for each shape of pipeline systems but not contrary to the provisions
of this process
2.
The standards forced to apply
Including the
national technical standards for safety as follows:
+ TCVN 6158:1996: Pipelines
of steam and hot water – Technical requirement.
+ TCVN 6159:1996: Pipelines
of steam and hot water – Method of testing.
+ TCVN 6008:1995: Pressure
equipment – Welds, technical requirement and method of testing.
+ TCVN 4395:1986 Non-destructive
testing - Testing of welds by Ronghen and gamma rays.
3.
The steps of testing
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
- To prepare
the testing: Item 3.1
- To check
dossier: Item 3.2
- To check
outside: Item 3.3
- To check the
capability to bear pressure: Item 3.4
- Note: The following inspections are
conducted only when the inspection results of the previous step
has been satisfactory
3.1 Preparation
of testing
3.1.1. To notify the establishment of the plans and requirements
before implementing the testing of pipeline system.
3.1.2. To
define and agree on the
safety measures with the establishment before
implementing the testing. To prepare fully the instruments, personel
protective facilities, tools, equipment used for the testing process.
3.1.3 To
check the personel protective, rescue facilities for the testing process
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
Based on the testing regime
to inspect and review records of the pipeline system:
3.2.1 When implementing the first
testing, it must consider the following dossiers:
a, Dossier of
installation: installation design , pipeline location layout (location of
welds, racks; parts clearing expansion, condensate drain), the overall system
acceptance test minute.
b, The certificates of quality
inspection of fabrication metal, weld metal, inspection minute of welds quality.
3.2.2 When
implementing the regular testing, it must consider the following dossiers:
a, Testing
minute and the previous testing result.
b, Book of
monitoring repair and maintenance, the proposals stated in the minutes of
inspection and testing related to the technical condition of the pipelines (if
any).
3.2.3 When
implementing the irregular testing, it must consider the following dossiers:
As item 3.2.2
and supplement dossiers relating to repair or changes compared with the
pipeline location layout in the initial installation dosier.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.3 Outside
inspection
Before the
outside inspection is implemented, it needs to take the measures to ensure
safety to tester.
To perform
the inspection with eyes and use the necessary tools such as magnifying glass,
test hammer, measure (solid measure, measuring tape, caliper square, pan me
...) and dedicated lights.
+ Before the
outside inspection is implemented, slag, splashed metal marks, rust and other
dirty of the surface of the welds on the width not less than 20 mm and the base
metal parts located close to the welds must be cleaned (in both sides of the
weld).
+ To check
outside on the entire length of pipe and length of welds in accordance with the
technical requirements of pipeline fabrication and process of weld technology;
to check metal surfaces and the degree of corrosion.
+ To check
the parts of the pipeline; to determine the degree of deformation and the
stiffness of the suspension parts, pipe racks; the curvature of the pipe, pipe
bending angle.
+ To check
paint colors and signs as prescribed.
+ To check
the tighness of the joint details.
+ To check
the operational status of the parts and details of expansion; the discharge
point, valve of draining off standing water on the pipeline, the location and
condition of safety for discharge hole.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.4 Inspection
of the capability to bear pressure (hydraulic test)
It must
conduct hydraulic test to consider the capability to bear pressure of the
pipeline system according to the following orders:
The hydraulic
is implemented after the installation has been completed.
3.4.1. Determination
of the testing pressure: testing pressure equal to 1.5 times of maximum working
pressure of such pipeline.
Allowing
hydraulic test for the entire pipeline or each pipeline segment.
3.4.2. To
perform hydraulic test for pipeline when ambient temperature is more than 0o
C. When testing hydraulic, the pipeline has working pressure more than or
equal to 10 MPa, ambient air temperature shall not be less than 100C.
3.4.3. To be
allowed to test by air pressure only when there is not condition to test by
hydraulic or due to the volume of water is too great affecting the pipeline
suspensions, cracks.
3.4.3. In
case of testing with air pressure, the testing pressure and testing period is
similar to hydraulic test. Absolutely, not to hammer onto the welds when
testing the pipeline by air pressure at any pressure.
3.4.4. The
increase and decrease of pressure during the course of testing must be
proceeded slowly so as not to cause sudden expansion affecting the durability
of the pipeline.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.4.6. During
the durability test, it can proceed to calibrate and seal safety valve. safety
valve can be calibrated and sealed not at the same time with the durability
testing process.
Opening
pressure of safety valve depends on the technology process, not exceeding 1.1
times of permitted working pressure of the pipeline in any case.
3.4.7. The
result of testing the pipeline by hydraulic or compressed air is considered as
satisfactory when:
- During the
course of testing, the pressure is not reduced more than 3% compared with
prescribed testing pressure.
- The
pipeline is not deformed, leaked in the joints or welds.
4.
Handling of testing result
4.1. Making
the testing minute according to the prescribed form with full contents of the
minute (issued attached herewith). Stating clearly the standards applied during
the course of testing.
4.2. Recording
brieftly the testing result into the profile of the pipeline (stating clearly
name of tester, date, month, year of testing).
4.3. Passing
the testing minute
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
+ Owner of
the establishment or person who authorized by owner of the establishment.
+ Persons who are assigned to participate in and witness
the testing.
When the
minute is passed, the tester, attandants to witness, owner of the establishment
together sign; the owner of the establishment seals onto the minute
4.4. When the
pipeline system gets the requirements as provided in Item 3, leader of the
testing agency issues the testing result after the testing minute is passed on
site within 5 days.
4.5. When the
pipeline system does not get the requirements as provided in Item 3, the steps
4.1 and 4.2 shall be implemented and leader of the testing agency only issues
to the establishment the testing minute, stating clearly the reason that the pipeline
system is not satisfactory
5.
Cycle of testing
5.1. To
implement all the testing steps (except for hydraulic test): 3 years/time.
5.2. To
implement all the testing steps: 6 years/time.
5.3. When
shortening the cycle of testing, tester must state clearly the reason in the
testing minute.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
THE MINISTRY OF
LABOUR, WAR INVALIDS AND SOCIAL AFFAIRS
----------------------
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
THE
REFRIGERATION SYSTEM - THE PROCESS OF SAFE TECHNICAL TESTING
QTKD
05: 2008/BLDTBXH
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
HANOI - 2008
PREAMBLE
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
THE PROCESS OF SAFE
TECHNICAL TESTING FOR THE REFRIGERATION SYSTEM
1.
Scope of application
This process
specifies on the order, procedures of safe technical testing at the first,
regular and irregular time for the refrigeration systems stipulated according to
the list of types of machinery, equipment and materials with strict
requirements on occupational safety issued by the Ministry of Labour - War
Invalids and Social Affairs.
Based on this
process, the testing agencies apply directly or develop specific, detail
process for each shap, type of refrigeration systems but not contrary to the
provisions of this process.
2.
The standards forced to apply
Including the national
technical standards for safety as follows
+ TCVN 6153, 6154,
6155 and 6156:1996: Pressure vessel – Safe technical requirements for
design, structure, fabrication, installation, use, repair and method of testing.
+ TCVN 6104: 1996: Refrigeration
systems used for chilling and warming – Safety requirements
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
+ TCVN 7472-2005: Pressure
equipment – Joint weld.
3.
The steps of testing
To conduct a review, safe technical
inspection according to the following steps:
- To prepare
the testing: Item 3.1
- To check
dossier: Item 3.2
- To check
outside, inside: Item 3.3
- To check the
capability to bear pressure: Item 3.4
- To check
tighness: item 3.5
- To check
operation: item 3.6
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.1 Preparation
of testing
3.1.1. To notify the establishment of the plans and requirements
before implementing the testing of refrigeration
system.
3.1.2. To
define the safety measures before
implementing the testing. To arrange tester for participation in testing,
prepare fully the instruments, facilities, equipment
used for the testing process and facilities
equiped for personal protection.
3.2 Inspection
of dossier
3.2.1. Based on the testing regime
to inspect and review records of the system.
3.2.1.1 When implementing the first
testing, it must consider the following dossiers:
a, Dossier of
factory, profile of the refrigeration system; schematic drawing of working
principle of the system, structure drawing of parts bearing pressure of the
system, the certificates of weld materials, fabrication materials quality
inspection, welding material.
b, Profile of
installation and installation acceptance minute.
c, The
minutes of the weld inspection, measurement unit testing paper; minute of
checking ground, anti-lightning, protective equipment.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
a, Profile,
testing minute and the previous testing result.
b, Operation
log books, books of monitoring repair and maintenance; minutes of inspection,
testing (if any).
3.2.1.3 When
implementing the irregular testing, it must consider the following dossiers:
a, In case of
repair: repair design dossier, after-repair acceptance test minute with welding
equipment bearing pressure.
b, In case of
changing the installation location: need to consider the supplementation of
installation dossier.
c, In case
equipment does not work from 12 months or more, dossier shall be considered as
regular testing.
Note: When
implementing the inspection, dossier of the refrigeration system must be
prepared fully
and in
accordance with provisions of Regulation, TCVN on current safety national
techniques. If
it is not
assured,
the establishments must have
the additional remedies
3.3 Inside,
outside inspection
3.3.1.
Inside, outside inspection of the pressure vessels of the refrigeration system
complies with “Pressure vessels – The Process of safe technical testing”.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.3.3. Prior to the
inspection of the inside parts of the system, it needs to withdraw gas to
ensure the equipment which is no longer excess pressure and concentrations of
explosive, hazardous substances is within allowed level.
3.3.4.Inspection
to detect the cracked, sunken, floated, rusty, errosive marks on the parts,
details of the system.
3.3.5.
To check
the working status of the accessories, measurement units, the number of safety
valves and the safety protection structures of the system must ensure the
requirements of the standard.
3.3.6.To
check technical status of the pipeline system in the system.
3.3.7. To check the tighten
details worn, losen, joints and insulation
parts destroyed.
3.3.8. To check valves, control valves on the
number, category and the installation location upon standard as well.
3.3.9. Where
the refrigeration system layouts other protection structures such as lead tack,
bursting disk, its integrity need to be determined, when these structures have
been replaced, its working parameters need to be checked and must conform to
provisions of the standards.
3.3.10.
To check the
working status of the cooling systems.
3.3.11. Where the refrigeration system using toxic or explosive solvent-substance, it needs to
check the ventilation system for the compressor room and the exit of the safety valve to ensure upon regulations of the applicable standards.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
It must
conduct hydtaulic test to consider the capability to bear pressure of
the system according to following orders:
- Preparation of
testing: to isolate compressor, to interupt suction head air pressure gauge, to
open valves (except for discharge valves), connect with devices to provide
testing pressure.
- To raise system
pressure slowly up to the durability testing pressure for the low-pressure side,
perform the isolation, then raise to durability testing pressure for high-voltage
side.
- To maintain testing
pressurewithin 5 minutes, then reduce slowly to the tight testing pressure.
3.4.1.Determination
of testing pressure: Testing pressure is under provisions in item 3.1.1.1 and
3.1.1.2 of TCVN 6104 -1996.
3.4.2.
It must
take measures to controll the effects of overvoltage protection devices and
ensure these devices not to be ruined during the testing process. In case of
unable to implement, it must be isolated or dismantled for separate tests.
3.4.3.
Determination of testing solvent-substance is under provisions of manufacturers
and applicable standards.
3.4.4. If
there is not test
condition with water, other liquids, then may use compressed air, inert gas to
test with the conditions that the durability of the device was tested by
calculation; to implement fully the safety regulations for the testing method
by air.
3.4.5.
To check
the working pressure of the safety valves mounted on the trial part of the
system. To reduce testing pressure back to the working pressure and being
maintained during the testing process.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.4.6.Valuation
of testing result: Testing result must meet minimum requirements as provisions
on hydraulic test in “Pressure vessels – The process of safe technical testing”.
3.4.7. Where the
system is free from hydraulic test in accordance with provision of TCVN on
current safety technique, it must state clearly the reasons in the testing
minute and attach the minutes of the hydraulic test of the technical council of
the fabrication and installation establishment into the testing minute.
3.4.8.In the
special cases: When the presure bearing equipment of refrigeration system (the
time limit of testing has not come yet) is replaced and such replacement
equipment has been tested the capability to bear pressure, so when it is
installed into the system, durability test for the entire system shall be
permited free however the system must be conducted tight test.
3.5 Inspection
of tightness (tightness test)
3.5.1.The
tightness test is implemented after the system is mantled completely (due to
the first installation or request to separate the system for hydraulic test
when conducting regular test). It can test the tightness in accordance with
each block of the system and retest at the connections.
3.5.2. The
tightness testing pressure equal to working pressure of the system.
3.5.3.To
maintain testing pressure within 24 hours. In the first 6 hours, testing
pressure is not more than 10% and not reducing later.
3.5.4.Time
for tightness test is according to provisions of applicable standards or of the
manufacturer.
3.5.5. To conduct the test with soapy water. The
possibility of leakage on the pipeline is less likely to occur so should check
the welds, flanges, front valve connections. If the above mentioned test was
implemented without detecting blowed, opened traces however, the pressure is
still reduced, then inspection on pipeline can be implemented.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
Only after
the test was implemented completely without detecting leakage, the insulation
covering for the pipeline and equipment shall be implemented.
Note: The
pressure in the system depends on the ambient temperature, means dependent on
time in day, so it is needed to check in a certain time in day.
3.5.6.Valuation
of testing result: The tightness testing step is considers satisfactory when
there is no leakage phenomenom and pressure in the system is not reduced.
3.6 Operating
inspection (operating test)
It must test
the capability of operation of the refrigeration system according to the
following orders:
Before the
operating test is implemented, the evacuation of vacuum and charging
refrigerant to the system needs to be implemented.
To check
entire system to ensure the operation.
3.6.1.Based
on the process, coordinating with the establishment to put the system into use.
3.6.2.To
check safety valves working pressure on the entire refrigeration system.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.6.4.
To check
the impact parameter of protection, automation equipment (except for safety
valve).
3.6.5. When the
system works well, stably; correction and lead seal for safety valves shall be
implemented. The dischage pressure of the safety valve is implemented as
specified in Table 3 TCVN 6104:1996.
3.6.6.Valuation
of testing result
4.
Handling of testing result
4.1.Making
testing minutes.
4.1.1. Making
testing minutes under provided form (issued attached herewith). When the
hydraulic test is free, the minute of hydraulic test exemption reffered to in
3.4.7 of this process shall be attached, stating fully the contents of the
minute. Stating clearly the standards applied during the course of testing.
4.1.2.
Recording brieftly the testing result into the profile of the system (stating
clearly name of tester, date, month, year of testing).
4.2. Passing
the testing minute
Participants to pass the
minute of testing required
having at least the following members:
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
+ Persons who are assigned to participate in and witness
the testing.
When the
minute is passed, the tester, attandants to witness, owner of the establishment
together sign; the owner of the establishment seals onto the minute.
4.3. When the
system gets the requirements as provided in Item 3, leader of the testing
agency issues the testing result after the testing minute is publicized on site
within 5 days.
4.4. When the
e system does not get the requirements as provided in Item 3, the steps 4.1 and
4.2 shall be implemented and leader of the testing agency only issues to the
establishment the testing minute, stating clearly the reason that the tested
system is not satisfactory.
5.
Cycle of testing
5.1. For
refrigeration systems using cooling agents of metal non-corrosion:
5.1.1. To
implement all the testing steps (except for hydraulic test): 3 years/time.
5.1.2. To
implement all the testing steps: 6 years/time
5.2. For
refrigeration systems using cooling agents of metal corrosion:the cycle of
testing is under the provisions in 5.1 but being reduced 1/3 of time.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
5.4. When
shortening the cycle of testing, tester must state clearly the reason in the
testing minute./.
THE MINISTRY OF
LABOUR, WAR INVALIDS AND SOCIAL AFFAIRS
-----------------------
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
BOILERS
- THE PROCESS OF SAFE TECHNICAL TESTING
QTKD
06: 2008/BLDTBXH
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
HANOI – 2008
PREAMBLE
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
THE PROCESS OF SAFE
TECHNICAL TESTING FOR THE BOILERS
1.
Scope of application
This process
specifies on the order, procedures of safe technical testing at the first,
regular and irregular time for the boilers to the list of types of machinery,
equipment and materials with strict requirements on occupational safety issued
by the Ministry of Labour - War Invalids and Social Affairs.
Based on this
process, the testing agencies apply directly or develop specific, detail
process for each shap, type of boiler but not contrary to the provisions of
this process.
2.
The standards forced to apply
Including the
national technical standards for safety as follows
+ TCVN 7704: Boilers
- Safe
technical requirements for design, structure, fabrication, installation, use,
repair.
+ TCVN 6008-1995: Pressure
equipment– Welds: Technical requirements and method of testing.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.
The steps of testing
To conduct safe technical
inspection according to the following steps:
- To prepare
the testing: Item 3.1
- To check
dossier: Item 3.2
- To check
outside, inside: Item 3.3
- To check the
capability to bear pressure: Item 3.4
- To check
operation: item 3.5
- Note: The following inspections are
conducted only when the inspection results of the previous step
has been satisfactory
Before conducting the
search: The safety measures
must be taken, boiler must be cleansed; the inspection
door, door for person to creep into (if any) must be
removed; when having doubt
on technical state of the parts bearing pressure of the
vessel, it need to be removed a part or
the whole of the insulation layer to ensure to the external,
internal examination; the establishment must appoint a person to witness the search.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.1.1. To notify the establishment of the plans and requirements
before implementing the testing of boilers.
3.1.2. To
define and agree the safety measures with the establishment before implementing the testing. To arrange tester for
participation in testing, prepare fully the instruments,
facilities, equipment used for the testing process and facilities equiped for personal
protection
3.2 Inspection
of dossier
3.2.1. Based on the testing regime
to inspect and review records of the boilers
3.2.1.1 When implementing the first
testing, it must consider the following dossiers:
a, Profile of
the boilers, (includes: criteria on fabrication metal, welding metal, durability
calculation of parts bearing pressure, structure drawing stated fully the major
size and guidance of the operation and maintenance, repair; regime of supplying
water...).
b, Factory profile of boilers (including certificates of fabrication metal, welding metal, testing results of welding quality; minutes of factory trial...)
c, The place
to locate boiler: space to locate boilers, regulations on safe distance, stairs
and operations floor, lighting systems, fuel storage, fuel supply and
discharge, anti-lightning system, the communication system, exits arrangement,
toilets.
d, Installation
minute includes the main items as follows:
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
- Characteristics
of the additional materials when installed.
- Data on the
welding such as welding technology, welding codes, the name of the welders and result
of welds test.
- The testing
minutes of each parts of boiler (if any).
- Documents
on the system inspection by the way of ball or by other methods to ensure the
through system (if any).
- Documents
on the spectral inspection for boiler components, superheater works with a
larger temperature 450o C
- Documents
certifying the quality of boilers after they are transported to the place of
installation.
3.2.1.2 When
implementing the regular testing, it must consider the following dossiers
a, Profile,
testing minute and previous testing results.
b, Operation
log books, book of monitoring maintenance and repair; testing, inspection
minute (if any).
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
a, For
boilers meeting breakdown or overhaul: with replacement, welding ... the
pressure bearing parts of boilers shall be made a record of repair and boilers
which stop operating from 12 months or more, change the installation location must
be conducted irregular testing.
b, Dossier of
inspection includes:
- Design for
repair and after-repair acceptance test minute or installation acceptance test
minutes.
- The other
related records must be checked as in step of regular testing.(3.2.1.2)
Note: For
boilers with clear origin but technical dossier which is insufficient, then they
must be made additional dossier.
3.3 Outside,
inside inspection
Tools for
inspection: magnifying glass, testing hammer, mesurement unit, specialized
lighting ... enough to determine the type and size of defect.
For the
boiler equipment with height of 2m or more, the work (scaffolding) must be set
up to consider all parts of the boiler.
3.3.1. Upon
examination of the boiler’s outside and inside, it needs to note for finding
out the following shortcomings:
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
- Status of
sediment, rust, metal errosion of parts.
- Technical
status of the accessories, measurement units and safety.
- Technical
status of the insulation layer.
- To check
the tighness of the connection details.
- For the
location that is unable to inspect inside when testing, the inspection of
technical conditions must comply with the technical documentation of the
manufacturers. it must be clearly stated in the dossier: the volume needs to be
inspected, methods and inspection order.
3.3.2. To
check equipment of water supply on quantity and the current technical status.
3.3.3. To
check the requirements of water supply regime – boiler water and the status of
water treating equipment.
3.3.4. Upon
detection of defects reducing the durability of pressure bearing rod (to be
thin, the joints worn ...), the working parameters of boilers need to be
reduced. The reduction of parameters must be based on the strength calculation
by the design data.
3.3.5. Where meeting
difficulty in determining the cause of the defects discovered, the establishment
using the boiler is responsible for conducting the necessary testing. Boiler
must be stoped working when the metallicity testing results of water, air bags,
or other essential parts of the boiler are:
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
- Tensile
durability is lower than 3,2MPa;
- The ratio
between conventional
limit of stretching strain (when the residual deformation is 0.2 % ) with
tensile durability is more than 0,75.
- Relative
elongation is lower than 16%.
- Impact
toughness on the sample with sharp heads smaller than 0,25 N/c
When made from
alloy steel upon provisions in the technical materials of the factory:
3.4 Inspection
of the capability to bear pressure (hydraulic test)
It must
conduct hydraulic test to consider the capability to bear pressure of the
boilers according to the following orders:
order of
regular or irregular hydraulic test for boiler equipment after being installed
is stipulated in 10.3.1;10.3.3; 10.3.4; 10.3.5 of TCVN 7704:2007.
3.4.1. Determination
of testing pressure:
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
Design
pressure,MPa
Hydraulic
testing pressure,MPa
p ≤ 0,5
2 p but not less
than 0,2 MPa
p ≥ 0,5
1,5 p but not less
than 1 MPa
Hydraulic
testing pressure of boilers when testing regularly or irregularly depends on
the permitted standard working pressure according to the following table:
Standard working pressure
of boilers,MPa
Hydraulic
testing pressure,MPa
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
1,5 
but not less than 0,2MPa
> 0,5
1,25 but not less than + 0,3 MPa
Note:
means pressure of steam from the
boiler for the boiler only producing saturated steam;
means pressure of steam from
superheater for the boiler only producing superheat steam.
3.4.2. Determination
of time for hydraulic test: time to maintain hydraulic testing
pressure after the installation is 20 minutes; boilers are made upon the type of
intergral (fast installation) and the boilers for regular and irregular testing
is 5 minutes.
3.4.3. To fill fully
water into the boiler (temperature below 50oC and not lower than
ambient temperature of over 5oC), the increasing of pressure in
accordance with provisions on speed and time to avoid the sudden expansion.
3.4.4. To prohibit
the hamber during the time that boiler bears testing pressure.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.4.6. Upon testing,
if detecting cracks on the surface or the connections, rivet connections not
tighten thanking to signs of water, steam leakage; salt ... the using
establishment must find the cause and have measures to handle thoroughly.
3.4.7. When doubting
on the technical status of pressure bearing parts of boilers, the boiler user
needs to remove part or the entire insulation layer, remove number of fire
tubes or cut a portion of water tube for checking.
3.4.8. Boilers made
upon the type of intergral (fast installation), if when being transported to
the place of installation, they are not damaged parts of bearing pressure and
time of factory of less than 12 months are free from hydraulic test. It must be
stated clearly reasons in the testing minute and attatched the
hydraulic testing minutes of factory of the technical council of manufacturer and the installation
testing minutes of the installation unit and using establishment.
3.5 Operating
inspection (operating test)
It must test
the capability of operation of the boilers according to the following orders:
3.5.1. To check the
conditions for the normal operation of the boilers.
3.5.2. Based on the
operating process, the establishment is required to conduct the process of
burning and increasing pressure of boilers.
3.5.3. In the process
of increasing pressure to working pressure of the boiler, the working status of
the boiler, protection, measurement unit, supplementary equipment need to be closely
monitored. If finding out an unusual phenomenom, requesting the establishment
to stop boiler’s working according to procedures, conducting inspection, making
specific conclusions and remedies.
3.5.4. When
increasing up to the working pressure, if there is any unusual phenomenom, then
continuing to increase to check and adjust working pressure of the safety
valves, making the lead seal for checked safety valves.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
3.5.6. Valuation of
testing result: boiler operates normally, gains the standard technical
parameters.
4.
Handling of testing result
4.1. Making testing
minute.
4.1.1. Making
testing minutes under provided form with full contents of minute (issued
attached herewith). When the hydraulic test is free, the minutes reffered to in
3.4.8 of this process shall be attached. Stating clearly the standards applied
during the course of testing
4.1.2. Recording
brieftly the testing result into the profile of boiler (stating clearly name of
tester, date, month, year of testing).
4.2. Passing the
testing minute
Participants to pass the
minute of testing required
having at least the following members:
+ Owner of
the establishment or person who authorized by owner of the establishment.
+ Persons who are assigned to participate in and witness
the testing.
...
...
...
Bạn phải
đăng nhập hoặc
đăng ký Thành Viên
TVPL Pro để sử dụng được đầy đủ các tiện ích gia tăng liên quan đến nội dung TCVN.
Mọi chi tiết xin liên hệ:
ĐT: (028) 3930 3279 DĐ: 0906 22 99 66
4.3. When the
boiler gets the requirements as provided in Item 3, leader of the testing
agency issues the testing result after the testing minute is publicized on site
within 5 days.
4.4. When the
boiler does not get the requirements as provided in Item 3, the steps 4.1 and
4.2 shall be implemented and leader of the testing agency only issues to the
establishment the testing minute, stating clearly the reason that the tested
boiler is not satisfactory.
5.
Cycle of testing
5.1. Outside, inside
inspection: 02 years per time
5.2. Outside, inside
inspection, hydraulic test: 06 years per time
5.3. Inspection of
boiler’s operation: 01 year per time
5.4. When
shortening the cycle of testing, tester must state clearly the reason in the
testing minute.
5.5. The cases must be tested irregularly: according
to provisions in 11.2.5 TCVN 7704:2007