|
THE
MINISTRY OF INDUSTRY AND TRADE
-------
|
THE
SOCIALIST REPUBLIC OF VIETNAM
Independence– Freedom – Happiness
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|
|
No.
18/2013/TT-BCT
|
Hanoi,
July 31, 2013
|
CIRCULAR
PROMULGATING THE NATIONAL
TECHNICAL REGULATION ON SAFETY OF STEEL CYLINDERS FOR LIQUEFIED PETROLEUM GAS
Pursuant
to the Government’s Decree No. 95/2012/ND-CP dated November 12, 2012, defining
the functions, tasks, powers and organizational structure of the Ministry of
Industry and Trade;
Pursuant
to the Law on Standards and Technical regulations No. 68/2006/QH11 dated July
21, 2006;
Pursuant
to the Law on product
and goods quality No. 05/2007/QH12 dated November 21, 2007;
Pursuant
to the Government’s Decree No. 127/2007/ND-CP dated August 01, 2007, detailing
implementation of a number of Articles of Law on Standards and Technical
regulations;
Pursuant
to the Government’s Decree No. 132/2008/ND-CP dated December 31, 2008,
detailing implementation of a number of Articles of Law on product and goods
quality;
At the
proposal of Director of the Industrial Safety Techniques and Environment
Agency;
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Article
1. To promulgate together with this
Circular the national technical regulation on safety of steel cylinders for
liquefied petroleum gas.
Signal:
QCVN 04:2013/BCT
Article
2. This Circular takes effect on
September 15, 2013.
Article
3. People’s Committees of provinces
and central-affiliated cities, the concerned heads of agencies, organizations
and individuals shall implement this Circular.
FOR MINISTER OF INDUSTRY AND TRADE
DEPUTY MINISTER
Le Duong
Quang
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NATIONAL TECHNICAL REGULATION ON
SAFETY OF STEEL CYLINDERS FOR LIQUEFIED
PETROLEUM GAS (LPG)
Foreword
QCVN
04:2013/BCT is prepared by Drafting Board of the national technical regulation
on safety of steel cylinders for liquefied petroleum gas, submitted by the
Industrial Safety Techniques and Environment Agency, appraised by the Ministry
of Science and Technology, and promulgated together the Circular No.
18/2013/TT-BCT dated July 31, 2013, of the Minister of Industry and Trade.
THE NATIONAL TECHNICAL REGULATION ON SAFETY OF STEEL CYLINDERS FOR
LIQUEFIED PETROLEUM GAS (LPG)
Chapter
1.
GENERAL PROVISIONS
Article
1. Scope of regulation
The
national technical regulation on safety of steel cylinders for liquefied
petroleum gas prescribes the safety technical requirement in design,
manufacture, import, repair, test, storage, transport and use of the refillable
steel cylinders for LPG with volume of between 0.5L and 150 L.
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Article
2. Subjects of application
This
Regulation applies to organizations and individuals that design, manufacture,
import, repair, possess, test, deliver and receive, transport, and use of steel
cylinders for LPG and other concerned organizations and individuals.
Article
3. Interpretation of terms
The terms
in this Regulation are construed as follows:
1. Liquefied
petroleum gas is hydrocarbon product originated from petroleum with main
component including propane (C3H8) or butane (C4H10)
or mixture of both of these kinds. At normal temperature and
pressure, these hydrocarbons are gaseous and change
into liquid upon being compressed to a defined pressure or cooled to an
appropriate temperature.
2. Steel
cylinders for LPG (hereinafter referred to as cylinders for LPG or
cylinders) are the refillable cylinders for LPG with volume not more than 150 L
and manufactured by welded steel meeting technical requirements of this
Regulation.
3. Test
means operation of assessment and confirmation on technical safety
condition of cylinders for LPG as prescribed in this Regulation.
4. Station
for testing the cylinders for LPG means station satisfying the conditions
as prescribed by law for testing kinds of cylinders for LPG.
Article
4. The referenced standards
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TCVN
6111:2009, Non-destructive
testing. Radiographic examination of metallic materials by X- and gamma-rays.
Basic rules.
TCVN
6223: 2011, Liquefied
petroleum gas (LPG) store General Safety Requirements.
TCVN
6294: 2007, Gas
cylinders - Welded carbon -steel gas cylinders - Periodic inspection and
testing (ISO 10460: 2005).
TCVN
6304: 1997, Liquefied
petroleum gas cylinders – Safety requirements in storage, handling and
transportation.
TCVN 6700
-1, Approval
testing of welders - Fusion welding – Part 1: Steel (ISO
9606-1).
TCVN 6834
-3, Specification
and approval of welding procedures for metallic materials - Part 3: Test of arc
welding procedures for steel of all kinds (ISO 9956-3)
TCVN
7762: 2007, Gas
cylinders - Refillable welded steel cylinders for liquefied petroleum gas (LPG)
- Procedures for checking before, during and after filling.
TCVN
7763: 2007, Gas cylinders – Transportable refillable welded steel cylinders
for liquefied petroleum gas (LPG) - Design and construction.
TCVN
7832: 2007, Gas cylinders - Refillable welded steel cylinders for liquefied
petroleum gas (LPG) - Periodic
inspection and testing.
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ISO
1106-1: Recommended practice for radiographic examination of fusion welded
joints - Part 1: Fusion welded butt joints in steel plates up to 50 mm.
ISO
1106-3: Recommended practice for radiographic examination of fusion welded
joints - Part 3: Fusion welded circumferential joints in Steel pipes of up to
50 mm.
ISO 4978:
Flat rolled steel products for welded gas cylinders.
ISO
14732: Welding personnel - Approval testing of welding operators for fusion
welding and of resistance weld setters for fully mechanized and automatic
welding of metallic materials
ISO
17637: Nondestructive testing of welds - Visual testing
ISO
17639: Destructive testing on welds in metallic materials.
Chapter
2.
TECHNICAL PROVISIONS
Article
5. Provisions on materials
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a)
Materials to manufacture bottle jacket must conform to ISO 4978 or satisfy
requirements of table 1;
b)
Details welded on bottles must be manufactured of compatible materials;
c) The
welding materials must make joints with the minimum tensile durability no
less than the tensile
durability prescribed for basic materials for manufacturing bottles.
Table 1 - Requirements on materials
Element
Limit % max
Materials
other than materials provided in ISO 4978 in order to manufacture cylinders
for LPG, must be able to be welded and in analysis of casting, the following
elements do not exceed the allowed limit:
Carbon
0.22
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0.45
Mangan
1.60
Photpho
0.025
Sulfur
0.020
Photpho
+ Sulfur
0.040
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Niobium
0.08
Titan
0.2
Vanadium
0.2
Niobium
+ Vanadium
0.2
When
using other micro-alloy elements, in the material certificate must clarify
ingredients and quantity.
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Producers
must have material dossier of cylinder lot as prescribed at point b Clause 5
Article 9 of this Regulation.
Article
6. Provisions on design
1. General
provisions
a)
Producers must make the manufacture drawings with full size, tolerance of
materials, technical parameters, technical requirements of products;
b) Design
documents must be approved before manufacture;
c) The
producers must be responsible for design, selection of materials and calculate
durability, quality;
d)
Pressure to calculate the thickness of the bottle jacket of cylinders for LPG: Pc
= 3 MPa (30 bar);
dd)
Design of shape of bottom of cylinders for LPG must satisfy the following
requirements:
- For
bottom in shape of sphere frustum: R ≤ D; r ≥ 0.1D; h ≥ 4b;
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D- Outer diameter of bottle (mm).
b - The
minimum calculated thickness of bottle (mm).
H - The
outside height of bottom arch of bottle (mm).
h - The
height of cylinder part of bottle bottom (mm).
R –
Inside disc-lap radius of bottle bottom (mm).
r –
Inside glide radius of bottle bottom (mm).
Note: For
sphere frustum bottom:
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a) The
thickness of body of cylinder bottle is not less that the thickness calculated
under formula:
(1)
The
stress reduction factor, J = 0.9 (bottles with the vertical welded joints)
The
stress reduction factor, J = 1.0 (bottles without the vertical welded joints)
Value of
fluidity stress, R0 = 0.85Rg (Rg the minimum
tensile durability).
Thickness
of bottle body: a (mm)
Outer
diameter of bottle: D (mm)
Pressure
to calculate the thickness of the bottle jacket of cylinders for LPG: Pc
(bar)
b) The
thickness of body of bottle bottom is not less that the thickness calculated
under formula:
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C: Coefficient
of shape, depending on value H/D (table 2, pictures 2 and 3).
c) Do not
apply formula (1) when the length of cylinder part of cylinders for LPG measured
between the starting points of curve sections of two bottoms not more than 
In this
case, the thickness of bottle body is not less that the thickness curve bottom
calculated under formula (2).
Table 2 – Relation between H/D and coefficient of shape C
H/D
C
H/D
C
0.25
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0.38
0.612
0.26
0.931
0.39
0.604
0.27
0.885
0.40
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0.28
0.845
0.41
0.588
0.29
0.809
0.42
0.581
0.30
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0.43
0.576
0.31
0.743
0.44
0.572
0.32
0.713
0.45
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0.33
0.687
0.46
0.568
0.34
0.667
0.47
0.566
0.35
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0.48
0.565
0.36
0.633
0.49
0.564
0.37
0.621
0.50
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Note: The
medium values are defined by linear interpolation method
Picture 2. Values of coefficient of shape C for H/D from 0.2 to
0.25
Picture 3. Values of coefficient of shape C for H/D from 0.25 to
0.5
d) The
minimum body thickness of cylinder, a, and of bottom, b, are not less that the
value defined under any following formulas:
- For
bottles with radius D < 100 mm
amin
= bmin = 1.1 mm
(3)
- For
bottles with radius 100 mm ≤ D ≤ 150 mm
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- For
bottles with radius D > 150 mm
amin = bmin
= (D/250) + 0.7 mm
(5)
(With the minimum value is 1.5 mm)
Formulas: (3), (4),
(5) mentioned above are applied to cylinder and bottom, regardless of whether
they are designed under calculation prescribed in formula (1) or (2).
3. Requirements
on bottle construction
a) Bottle
construction must ensure capability for usual checking status of metal surface,
welded joints of cylinders for LPG; ensure the protection against damages in
respect with valve and the safety upon transport, preservation and use;
b) Bottle
bottoms must be manufactured under ellipse or of sphere frustum shapes and made
of one-piece materials in accordance with technical requirements;
c) The
vertical welded joints and the welded joints along perimeter on bottle body are
only permitted welding adjacent to edges. The welding process must
comply with the approved welding process;
d) Number
of the vertical welded joints on bottle body is not more than 01;
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e)
Position of all holes must be arranged on a top of bottle;
g) Every
hole on bottle must be reinforced by an appropriate welded-steel convex buffer,
welded securely and designed to have enough durability, not cause stress
concentration;
h) Materials
of handle and bracket must be made of appropriate steel and able to be welded;
i) Handle
and bracket must be designed to not obstruct the examination of the welded
joints and to prevent from stagnant water. Space at bracket of bottle
must be ventilated appropriately;
k) Valves
fitted on bottle must have label and be tested before fitting to bottle, must
satisfy technical standards in line with LPG, must be assess appropriately by
organizations of certifying quality in accordance with regulations.
Labels of
valves must be written clearly:
- Name of
producer;
- Model
of valve;
- The
used solvent;
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- Directions
to close and open bottle;
- Production
year of valve;
- Seal of
Conformity with Regulations (CR) on which the certified organization is shown.
Article
7. Provisions on manufacture
1. General
provisions
a) The
bottle producers must have technical officers with appropriate professional
skills. Welders must satisfy provisions in Clause 2 Article 7 of this
Regulation;
b) Bottle
producers must promulgate fully the technological process of manufacture, the
process of testing quality of products and regulations on safety.
2. Requirements
on welders
Parts of
cylinders for LPG must be welded by use of welders who have been passed
examination, accepted according to standard TCVN 6700-1 and drivers according
to standard ISO 14732.
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a) The
bottle producers must approve the welding process according to TCVN 6834-3;
b) Before
welding, the load-bearing details of cylinders for LPG must be tested visually
regarding the shape, size according to design;
c) The
vertical welded joints and the welded joints along perimeter must be welded by
measure of automatic or semi-automatic welding;
d) The
vertical welded joints must be kind of welded joints adjacent to edges; number
of joints is not more than 1, not use non-demountable buffer for vertical
welded joints;
dd) The
welded joints along perimeter must be kind of welded joints with sections which
may be curved into padding (picture 4); number of joints is not more than 2;
e)
Testing of defects of the welded joints on bottle is only performed after
thermal treatment;
g) The
welded joints do not flow over, have no crack, no blister, not ripe, not
reached through, height of the welded joints is not more than ¼ the width of
the welded joints and other defects bigger than the set level;
a-
Optional beveled level
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c – The
depth of curve section = e1
d –
Inside of bottle to prevent from being broken due to sharp
e – The
thickness of metal of curve section
e1
- The thickness of metal not creating curved section
Picture 4: The typical welded joints adjacent to edges with
padding
4. Requirements
on tolerance of manufacture
a) The
non-round extent of cylinder, measured on the basic metal part adjacent to the
welded joints, is not more than 1% for bottles with two pieces and 1.5% for
bottles with three pieces;
b)
Straightness: The maximum error in comparison with a straight of body of
cylinder does not exceed 0.3% of length of cylinder body;
c)
Vertical straightness: When bottle is placed on platform, error of the vertical
straightness does not exceed 25 mm on 1 meter of length of the cylinder body.
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a) All
bottles must be treated thermally after being welded;
b)
Conditions of thermal treatment must be prescribed in technical requirements;
c) Do not
perform the partial thermal treatment.
Article
8. Requirements on testing in manufacture
1. Testing
of mechanical properties
a)
General provisions
- All tests
of mechanical properties must be performed to test properties of basic materials
and joints on bottle jacket of cylinders for LPG on samples collected from the
completed bottles;
- For
bottles that only have joints along perimeter (bottles including two pieces),
samples for test are taken from positions instructed as picture 5, including
samples:
+ 01
sample for longitudinal tensile test of basic materials of bottle (1);
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+ 01
sample for the bending test at position of upper surface of the welded joint
along perimeter (3);
+ 01
sample for the bending test at position of root surface of the welded joint
along perimeter (4);
+ 01
sample for the rough test at position selected randomly on the welded joint
along perimeter.
1. Positions
changed for the tensile-test sample
2. Sample
for tensile test
3. Sample
for the bending test (the upper surface of the welded joints)
4. Sample
for the bending test (the root surface of the welded joints)
Picture 5. The samples taken from bottles including two pieces
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+ 01
sample for longitudinal tensile test of basic materials of cylinder of bottle
(1);
+ 01
sample for tensile test of basic materials from a bottom (2);
+ 01
sample for tensile test at position crossed with the vertical welded joints
(3);
+ 01
sample for tensile test at position crossed with the welded joints along
perimeter (4);
+ 01
sample for the bending test at position of upper surface of the vertical welded
joint (5);
+ 01
sample for the bending test at position of the root surface of the vertical
welded joint (6);
+ 01
sample for the bending test at position of upper surface of the welded joint
along perimeter (7);
+ 01
sample for the bending test at position of root surface of the welded joint
along perimeter (8);
+ 01
sample for the rough test at position selected randomly on the welded joint
along perimeter.
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1, 2, 3, 4. Samples for tensile test 5, 6, 7, 8.
Samples for the bending test
Picture 6. The samples taken from bottles including three pieces
b)
Tensile test
- To
perform the process of tensile test for the basic materials in line with TCVN
197. Do not process two faces of samples.
- Values
of fluidity stress, tensile durability and elongation measured upon test are
not less than the respective values stated in technical specifications of
materials or values disclosed in dossier of the bottle producers.
c) The
tensile test of the welded joints
- It is
required to perform tensile test for the welded joints on samples with the
minimum cross section at width of 25 mm and length expended to 15 mm from the edges
of the welded joints (picture 7), at positions farther than this middle
section, the width of sample must be increased.
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- Value
of tensile durability Rm is not less than the minimum tensile
durability Rg which is ensured by the producers and there is no case
less than the value provided in technical specifications of materials
regardless of positions whether the crack occurs in the cross section of middle
section of sample.
d) The
bending test
- Method
of bending test must conform to ISO 7438. Samples for the bending test must
have width of 25 mm. The bending roller is placed at the middle of the welded joints
when performing test (picture 8);
- Do not
occur cracks on samples when samples curved up angle of 1800
(picture 8).
1. Samples
with the welded joints adjacent to edges
2.
Samples with the tenon welded joints
3. The
repaired convex section of the welded joints
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Picture 8. The bending test
Ratio
between the radius of the bending roller and thickness of sample, depending on
the tensile durability measured practically Rm does not exceed value
n provided in table 3:
Table 3 - Ratio between the radius of the bending roller and
thickness of sample
Rm, MPa
n
≤ 440
2
> 440; ≤ 520
3
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4
2. The
visual test of surface of the welded joints, rough and radiographic
examinations
a) Visual
test of surface of the welded joints
To
perform the visual test of the welded joints according to ISO 17637 when the
welded joint has been completed. Surface of the tested
welded joints must be lighten fully and have no dirt or any cover layer for
protection.
b)
Requirements for rough examination
To
perform the rough examination according to ISO 17639 for all cross sections of
the welded joints in order to ensure that the welded joints must be ripe
completely and the welded joints must reach through completely.
c)
Requirements for radiographic examination
- It is
required to perform on the welded joints along perimeter and the vertical
welded joints (such as pictures 9 and 10) of the first bottle produced after
having:
Changes
on model or size of bottle;
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+ After
stopping production for duration more than 4 hours.
- Bottles
with the outer radius less than 250 mm may perform two rough examinations to
replace for the radiographic examination of the welded joints with buffer along
perimeter, including examination at the position of stopping or starting the
welding line and examination at the opposite site along radius of bottle;
- Bottles
with the vertical welded joints must perform radiographic examination at the
connection of the vertical welded joints and the welded joints along perimeter
(such as picture 10). Ratio of examination is 1/250 bottles produced;
- It is
required to perform the radiographic examination of the welded joints in line
with TCVN 6111:2009 (ISO 5579:1998), ISO 1106-1: and ISO 1106-3: level B;
- Do not
allow to have defects on the welded joints as follows:
+ Cracks,
the welded joints are not reached through or not ripe;
+ There
are the spread impurities or group of round impurities creating rows with the
length of more than 6 mm on length of the welded joint equal to 12 times of
thickness of basic material;
+ Air bubble with size more than 1/3 of thickness of basic materials;
+ Total
area of air bubbles on any 10 mm of length is
more than twice of thickness of materials.
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Picture 9. Size of radiographic examination of the welded joints –
Bottles only have the welded joints along perimeter
Size is calculated by millimeter
Picture 10. Size of radiographic examination of the welded joints
– Bottles have the welded joints along perimeter and the vertical welded joints
3. Test
in hydraulic explosion
a)
Producers must perform the explosion test by the hydraulic pressure with
equipment able to create the increasing pressure until the bottle is exploded. Pressure
at time bottle is exploded must be recorded.
b) The
minimum requirements of test
- The
explosion pressure is not less than 6.75 MPa (67.5 bar).
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+ 20%
when length of the bottle jacket bears pressure (including the boss for fitting
valve/ bottle
necklace) more than radius D of bottle;
+ 17%
when length of the bottle jacket bears pressure equal to or less than radius D
of bottle.
c) Crack
- Crack
does not start in the welded joint;
- The
edges of the crack are not centripetal, must create angles with centripetal
plane and have decrease of the area along their thickness;
- Crack
has no defect in basic metal, example delamination;
- Bottle
is not broken into pieces.
4. Hydraulic
power test
- The
solvent for test: Water;
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- When
perform hydraulic power test, the increase and decrease of test pressure must
be performed gradually. Duration to maintain at the test pressure is 01 min minimally;
- The
hydraulic power test is considered as satisfying requirements when: Pressure
is not decreased when maintaining at test pressure, there is no sign of
deformation, leakage on body of bottle, and the welded joints.
5. The
closed test
- The
solvent for test: Air;
- The test
pressure: At least 1,3 MPa (13 bar);
- When
perform closed test, light and water for test must ensure ability to detect
leakage if any;
- To dip
whole bottle in water at the test pressure. If bottle is leaked at
position of valve, it must be processed for further test. If there
is leakage on body of bottle, such bottle must be removed;
- To
perform discharge of gas, vacuum up - 50 kPa (- 0.5 bar) for bottles satisfied
requirement.
6. The
reversed bend test
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b) The
solvent for test is water;
c) For
this test, to fill 3 bottles with water, which represent for bottles with the
minimum thickness of bottle bottom under design, labeled fully and bear impact
of hydraulic pressure successively increasing and decreasing.
d) To
test at pressure of upper limit according to the cycle or:
- Equal
to 2/3 of test pressure, in this case, bottle must bear 80000 (eighty thousand)
cycles without destruction;
- Equal
to test pressure, in this case, bottle must bear 12000 (twelve thousand) cycles
without destruction.
Value of
the pressure of under limit according to the cycle does not exceed 10% of
pressure of upper limit according to the cycle. Reversed
frequency of pressure does not exceed 0.25 Hz (15 cycles/min). Temperature
on outside surface of bottle does not exceed 500C during test.
Article
9. The process of pre-acceptance test
1. General
provisions
a) All
test and pre-acceptance test as prescribed in this Article must be performed
for bottles before processing surface;
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c) It is
required to perform the radiographic
examination or the rough examination as prescribed at Clause 2 Article 8
of this Regulation;
d) It is
required to perform the test of mechanical properties as prescribed at Clause 1
Article 8 of this Regulation and the test in explosion as prescribed at Clause
3 Article 8 of this Regulation for samples as prescribed at Clause 2 Article 9
of this Regulation; It is required to measure the thickness of body at the thinnest
point and calculate the stress on an appropriate sample of bottle.
2. Test
under product lot
a)
Product lot
The
product lot must include bottles produces consecutively by a same producer, use
of a same technology of manufacture, pursuant to a same construction, size and
technical characteristics of material, on a same model of automatic welding
machine and with a same condition of thermal treatment.
b) Test
according to each lot
For
pre-acceptance test, products must be divided into each lot for examination
which does not exceed 1000 (one thousand) bottles. To select
samples for the explosion test or test in mechanical properties, each lot is
divided into small lots of 250 (two hundred fifty) bottles in 3000 (three
thousand) first bottles of a lot and the next lots are divided into the small
lots of 500 (five hundred) bottles or 1000 (one thousand) bottles depending on
size of bottles (picture 11).
c) Cycle
of taking samples
- General
provisions: When a product lot includes bottles made of materials from many
batches, the producers must arrange samples to represent for each batch of the
used materials.
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a For
bottles with volume ≤ 35 L
a For
bottles with volume > 35 L
Picture 11. Chart to illustrate cycle of taking sample
- Quantity
of less than or equal to 3000 (three thousand) bottles:
+ It is
required to select two bottles randomly from 250 first bottles or a fewer
number in each the tested lot to represent for lot of bottles, one bottle for
explosion test and one bottle for test in mechanical properties;
+ It is
required to select randomly one bottle for explosion test or for test in
mechanical properties from each group of 250 bottles or a fewer number next in
the tested lot.
- Quantity
of less than or equal to 3000 (three thousand) bottles:
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+ For
bottles with volume less than 6.75 L and the explosion pressure more than 10
MPa (100 bar). This bottle with requirement for test in mechanical properties may
put into the explosion test alternately according to decision of producer.
3. Labeling
a) The
following information must be stamped clearly on handle of cylinders for LPG:
- Name of
owner;
- Standards
of manufacture;
- Name of
producer;
- Number
of manufacture;
- Month/Year
of manufacture;
- Volume;
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- The
operating pressure;
- Pressure
of hydraulic power test;
- Bu tan
+ Propan (BU+PR) and weight for filling.
b) Do not
erase, modify information of producer.
c) Sign
of expertising is stamped on handle as prescribed at point 1 Clause 3 Article
11 of this Regulation.
4. Certificate
Each
bottle lot must have a certificate of producer in order to ensure that bottles
satisfy requirements of this Regulation in all aspects.
5. Dossier
Dossier
of producer must be made and kept according to each product lot including:
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b)
Material dossier
- Certificate
of analyzing metal ingredients of the casting batch and mechanical properties
of steel used for manufacture of bottle jacket;
- A slip
for identification of the material origin, including information: The sign
to identify materials, serial number of produced bottle (ensuring for tracing
origin of all materials for manufacturing bottle).
c) The
enclosed written records of examinations and tests include:
- The
written record of test result of sample bottles (volume, weight, the minimum
thickness of bottle body and bottom);
- The
written record of testing in mechanical properties;
- The
written record of hydraulic power test;
- The
written record of explosion test;
- The
written record of closed test;
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- The written
record of result of radiographic examination.
Article
10. Provisions on safety in filling bottles with LPG, transport, storage,
transport, installment and use of cylinders for LPG
1. Provisions
on safety for filling bottles with LPG
a) Do not
filling bottles with LPG, and have to do tests when detecting one of the
following cases:
- Bottles
have been expired for test;
- Bottles
have not yet been tested or not able to identify the expiry for test.
b) Do not
filling bottles with LPG, and have to assess to remove or repair bottles in the
following cases:
- Having
no information on weight of bottle jacket or have information but it is
unreadable;
- Bottles
have defects, faults at handle or base belt;
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- Bottles
are eroded to visible extent;
- Bottles
with burns due to arc, fire;
- Bottles,
valves or structures to reduce pressure (if being equipped) are leaked or
broken.
c)
Strictly banning filling with LPG for bottles of other owners without contract
of filling bottle with LPG with the filling station, bottles not identified
origin.
d) Only
be allowed to fill bottle with LPG at the eligible filling station as
prescribed.
dd) The
assessment to remove bottles when filling must comply with provision at item 5
of TCVN 7762:2007.
e) The
safe weight for filling as prescribed in item 6 TCVN 7762: 2007 and in all
cases not more than 85% of volume of bottle.
2. Provisions
on safe conditions for cylinders for LPG when circulation in the market.
a) Having
origin, conform to contract of purchase and sale, or contract of LPG-business
agents and having full dossiers archived as prescribed.
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c) Being
labeled as prescribed by law on good labeling.
d) Having
registered goods label as prescribed by law.
dd) LPG
bottles are intact as shape of initial design, have been tested and not
expired.
e) Being
sealed properly with standards.
g) LPG in
bottles must ensure to be proper with the designed weight, goods label and
quality standards as announced.
3. Provisions
on safety in storage
a) Safety
on warehouses containing LPG bottles
- Cylinders
for LPG must be preserved in warehouses according to design already approved by
competent agencies;
- Warehouses
must ensure the safe distances as prescribed at item 5.1.7 of TCVN 6304:1997;
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- Warehouses
preserving cylinders for LPG must ensure aeration, have at least two doors being
set to open toward outside, must have equipment to examine, warn LPG leakage,
must have system for protection against thunderbolt;
- All cellars, pits, canals, ditches must be
far at least 2 m from warehouses;
- Fences
of warehouses must be secure, have a height of not less than 1.8m and not cause
affect to natural air ventilation;
- The
foundation of warehouses must be solid, flat, higher than the ground around,
not slippery, and made of fireproof material. Do not
lay pipes, sewer at foundation of warehouses;
- Premises
of warehouses must have way to ensure for trucks and fire trucks to go in and
out conveniently;
- The
pathways and exit doors must be clear, have no obstacles;
- Warehouses
must have water sources for fire-fighting as prescribed;
- - Signboards
such as “no-fire”, “non-smoking”, “no trespassing, authorized persons only”,
“rule of fire prevention and fighting”, regulations on fire fighting
instruction must be hanged at apparent positions, in front of doors of
warehouses;
- Lighting
equipment must be explosion-proof equipment as prescribed;
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- Warehouses
must have air holes arranged on walls and roofs. Total
area of air holes is not less than 2.5% of area of wall; the air holes are not
near thermal sources, power sources;
- Warehouses
containing LPG bottles at stores must comply with TCVN 6223: 2011.
b) Safety
in displaying for sale of bottled LPG at LPG stores
- Arranging
and unloading cylinders for LPG must be performed under each lot, row;
- Kinds
of LPG bottles may be overlapped each other at a vertical and solid position. The
maximum height of each pile is 1.5 m. In case of overlapping LPG bottles with
various sizes, it must comply with principle which small bottle pile is laid
over bigger bottle pile. Distances among rows are not less than 1.5 m;
- Weight
of LPG in all bottles allowed to contain at store is 500 kg for an area of 12
m2 minimally and allowed to contain more 60 kg for each square meter area
increased additionally of area of warehouse or store in generally, not
including area of goods sale;
- In all
cases, total weight of LPG in store does not exceed 1000 (one thousand) kg;
- When
storage, displaying for sale, valves of bottles must be always closed tightly;
- Only
being allowed to display bottles containing no LPG on shelves for
advertisement;
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- Cylinders
for LPG must be intact of sealing, absolutely closed, ensure quality, weight
and label as registered when sell them to customers;
- At
stores, prohibit repairing bottles or filling bottles with LPG.
4. Provisions
on safety in transport of cylinders for LPG
a) Safety
in transport of cylinders for LPG by road
- Bottles
must be arranged vertically, valves of bottles are laid at upon. For
bottles with volume of between 99L and 150L, only arrange a layer. Bottles
with volume of less than 99L may be laid into many layers but not higher than
sides of vehicles;
- Cars
transporting cylinders for LPG do not allowed to use steel floor and must be
licensed for transport of dangerous goods in accordance with current
regulations;
- The
persons who are responsible for driving means of transport, goods owners (or
escorts) must be trained and examined safety techniques periodically and must
recheck the safety conditions of means of transport; only arranging LPG bottles
on means of transport which ensure safety and must observe the concerned
provisions in the Law on road traffic;
- Prohibit
inserting bottles with oil, grease and other flammable materials;
Prohibit
transporting cylinders for LPG together with bottles containing other gas;
prohibit transporting people and cylinders on the same means;
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- Prohibit
transporting cylinders for LPG by vehicles pulled by animals;
- Motorbikes
(two wheels) transporting cylinders for LPG must have secure shelves, bottles
must always be laid at vertical position and valves of bottles must be laid
upward. Quantity of bottles transported does not exceed 02 bottles;
- Prohibit
transporting cylinders for LPG together with persons in elevators.
- Prohibit
transporting cylinders for LPG on means of public travel.
b) Safety
in transport of cylinders for LPG by waterway
- When
transport cylinders for LPG by waterway, the concerned legislations on
transport of dangerous goods by waterway must be executed;
- Cylinders
for LPG in holds of boat must be ventilated naturally or have mechanical
engineering ventilators, mouth of ventilators must be laid at the lowest
position of holds of boat;
- Do not
transport cylinders for LPG in closed containers;
- Holds
containing cylinders for LPG must be equipped automatic fire-alarming and
sprinkler systems.
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- When
transport cylinders for LPG by railway, the legislations on transport of
dangerous goods by railway must be executed fully.
5. Provisions
on safety in installment of cylinders for LPG for user
a) Do not
mount cylinders for LPG in closed rooms or cellars;
b)
Cylinders for LPG must be mounted at vertical positions;
c) On
wall where lay cylinders for LPG must have air-gaps or vents. Bottom
positions of these air-gaps and vents are not higher than 150 mm from the
floor;
d) Areas
to arrange cylinders for LPG must have aeration, ensure that any leakage of LPG
also not cause burn;
dd) All
power equipment in house must be mounted at a distance of 1.5m from LPG bottles
minimally;
e) Any
source causing burn near area of LPG bottles must be removed;
g) Do not
install, preserve cylinders for LPG at area of doors and places often have
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a)
Prohibit all forms of extracting, filling bottles with LPG at families;
b) LPG
bottles, when are sold to user, must satisfy provisions on safety conditions of
cylinders for LPG when circulation in the market at Clause 2 Article 10 of this
Regulation;
c)
Cylinders for LPG, when are installed for users, must be checked the leakage,
operational status of safety valves, conducting wires and pipes;
d) When
supplying cylinders for LPG to users, stores or LPG agents must supply
customers 01 sheet of delivery and keep 01 copy at stores, in which have
information minimally: Serial number of bottle, the time of nearest expertising indicated
on bottle, name, address and contact telephone of store, name and address of
user, day of supplying bottle to user. The sheet of delivery must
be signed for confirmation of user. And they have to hand over
table of instruction of use and measures to overcome malfunction for customers;
dd)
Prohibit all form of extracting, filling bottles with LPG at places do not
allowed extracting bottles with LPG; when detecting cylinders for LPG not
ensuring safety, having risk of leaking LPG out environment, customers must
stop use and inform immediately to LPG store in order to overcome timely, not
arbitrarily repair, replace equipment;
e) When
detect store sells bottled LPG with bad quality, customers must inform traders
of LPG wholesale or general agents, agents, or competent functional agencies to
prevent and handle timely;
g) If
customers change to use LPG bottle of other trader or when customers do not
wish to further use cylinders for LPG, they must notify to the store where sold
LPG for this store to revoke cylinders for LPG.
Article
11. Provisions on expertising of cylinders for LPG
1. Form
of expertising
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b)
Periodical expertising when expiry of the previous expertising.
c)
Irregular expertising when necessary or at the request of competent agencies.
2. Duration
of expertising
Duration
of periodical expertising of cylinders for LPG shall comply with regulation of
producers but the cycle does not exceed 05 years from the nearest expertising
time. For bottles used over 20 years, duration of periodical expertising
does not exceed 02 years.
3. Procedures
for expertising of cylinders for LPG
a)
Inspecting dossier
- To
inspect dossier of the lot of bottle expertized for the first time as
prescribed at Clause 5 Article 9 of this Regulation;
- For
bottles subject to the periodic expertising having abnormal signs: To
consider list of the expertized bottles, the sheet of expertising result of the
previous expertising, reason of irregular expertising.
b) To
determine bottles need to be expertized.
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- The
periodical and irregular expertising (when owner or competent state agency has
doubts on technical status of cylinders for LPG): 100% of
bottles.
c)
Examination and preliminary handling
- Do not
expertize bottles not possessed or not authorized by organizations or
individuals requesting for expertising;
- To
check parameter indicated on handle, to compare with the technical parameter in
list. To supply bottles not in list;
- To remove
bottles without or with unclear parameter indicated on handle, bottles with
defects in excess of assessment such as the grooves crossed together, cracks,
defects due to fire, burn, arc or blowtorch;
- For
case of periodic expertising having abnormal signs: To suck
residual gas in bottle;
- To
remove the head valve of bottle by machine for dismounting valve of bottle. To check
valve of bottle, ensure safety for use;
- To
clean surface of bottles as necessary for the next steps of expertising.
d) To check
outside
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- To
remove bottles with defects in excess of the limit of removal as prescribed at
table 1, table 2, and table 3 of item 5.3 TCVN 7832: 2007.
dd)
Hydraulic test
To comply
with Clause 4 Article 8 of this Regulation.
e) Test
of volume expansion
- Test of
volume expansion must be performed from the fourth expertising.
- Test of
volume expansion is considered as satisfaction of requirements when the
permanent volume expansion level is less than 10% of the total volume expansion
level.
g) To
check inside
- To
discharge water out, clean the bottle after hydraulic test.
- To test
inside by endoscopy equipment to assess surface of metal, the welded joints,
corrosion inside of bottle.
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- Case of
expertise for the first time, the expertising unit must measure the thickness
of bottles in order to check, compare with dossier of bottle manufacture. To use ultrasound machine to measure thickness at points: bottom of
bottle: 3 points, head of bottle: 3 points, body of bottle: 6 points equally
divided on perimeter;
- In case
of periodic expertising, when detect bottle with defect of corrosion, pock-marked
surface, rust, it is required to measure the thickness in order to determine
the remaining thickness of bottle;
- The
thickness measured is not less than the minimum thickness of body and bottom of
bottle as prescribed in Clause 2 Article 6 of this Regulation. Case of
reducing thickness due to corrosion on body of bottle, bottles with reduced
level of thickness of more than the limit of removal prescribed at table 2 item
5.3 TCVN 7832:2007 will be eliminated.
i) To
mount valve, check weight
- To dry
bottle before mount the head valve of bottle.
- To
mount valve of bottle as prescribed at item 7.4 of TCVN 7832: 2007;
- To
check weight of bottle. If weight of bottle is less than 95% of weight of initial bottle,
to eliminate that bottle.
k) The
closed test: To comply with Clause 5 Article 8 of this Regulation.
l) To
handle result of expertising
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- To
stamp sign of expertising:
Bottles
meeting requirement of expertising will be stamped sign of expertising. Case of
expertising for the first time of lot of bottles, if lot of bottles meet
requirement of expertising, to stamp the sign of expertising for 100% bottle of
that lot;
+ To
stamp sign of expertising including the expertising agency, time of expertising
and time of re-expertising on the handle: [1] - [2] - [3] - [4] on a
same row, if length to stamp is not enough, may separate [1] in one row;
[1]: Logo
or sign of the expertising unit.
[2]:
Month, year of expertising (two last numbers).
[3]: the
next year of expertising (two last numbers).
[4]:
Weight of bottle (if weight changes over 0.2 kg).
The
minimum height of letters and numbers is 4 mm. Deadline
of re-expertising must comply with Clause 2 Article 11 of this Regulation. Do not
stamp over available data on handle.
- To make
written record of expertising and result of expertising. Dossier
of the expertising result must be kept at station of expertising and
organizations and individuals owning bottle as prescribed at item 9 TCVN
7832:2007.
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Article
12. Provisions on elimination and repair of cylinders for LPG
1. Requirements
on bottle repair
a) Only
repair bottles at eligible facilities of bottle manufacture and repair already
granted certificate of eligibility for manufacture and repair of cylinders for
LPG as prescribed.
b) Do not
conduct the following repairs:
- To
replace handle of bottle by new handle under any form, erase, change logo of
bottle aiming to occupy bottle of other owners, modify the initial technical
parameter of bottle.
- To
repair cylinders for LPG for other purpose.
- To
conduct concentrated heat treatment at area of body of bottle.
2. Requirements
on bottle removal
To
eliminate bottle as prescribed at item 8 of TCVN 7832:2007 for bottles need to
be eliminated after having performed assessment on removal as follows:
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b) The
assessment to remove bottles when filling complies with provision at item 5 of
TCVN 7762:2007.
c)
Cylinders for LPG already used over 26 years from the day of manufacture.
Chapter
3.
PROVISIONS ON MANAGEMENT
Article
13. Provisions on certification of technical-regulation conformity
1. General
requirement
Cylinders
for LPG, before put into circulation and use, must be announced
technical-regulation conformity in line with provisions in Chapter 2 of this
Regulation on the basis of result of assessing the conformity of the certifying
organizations appointed by the Ministry of Industry and Trade or the foreign
certifying organizations accredited according to International treaties of
which the Socialist Republic of Vietnam is a contracting party or international
agreements which have been concluded by competent agencies of the Socialist
Republic of Vietnam.
2. Assessment
of conformity
Assessment of
conformity for cylinders
for LPG is performed under one of the following methods:
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b) Method
7: Test, assess lot of products, goods;
c) Method
8: Test or expertise all products and goods.
Article
14. Provisions on announcement of technical-regulation conformity and fastening
seal of technical-regulation conformity (CR)
Announcement
of technical-regulation conformity and fastening seal of technical-regulation
conformity (CR) for cylinders for LPG comply with provisions of the Ministry of
Science and Technology and section II chapter 2 Circular No. 48/2011/TT-BCT
dated December 30, 2011 of the Minister of Industry and Trade, on quality management
of group-2 products and goods under the Ministry of Industry and Trade’s
management.
Article
15. Provisions on testing quality of cylinders for LPG
Test of
quality of cylinders for LPG in manufacture, import, circulation on the market
or use shall comply with Circular No. 48/2011/TT-BCT dated December 30, 2011
of the Minister of Industry and Trade, on quality management of group-2
products and goods under the Ministry of Industry and Trade’s management.
Chapter
4.
RESPONSIBILITIES OF ORGANIZATIONS
AND INDIVIDUALS
Article
16. Organizations and individuals
involving design, manufacture, export, import, repair, possession, expertising,
delivery and receipt, transport and use of steel cylinders for LPG and other
relevant organizations and individuals must comply with the safety technical
requirements specified at Chapter 2 of this Regulation, provisions in
Government’s Decree No. 107/2009/ND-CP dated November 26,
2009, on trading
in liquefied petroleum gas and Circular No. 41/2011/TT-BCT dated December
16, 2011 of the Minister of Industry and Trade, on safe management in the field of
liquefied petroleum gas.
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Article
18. Organizations and individuals
producing cylinders for LPG, traders importing cylinders for LPG must perform
certification of technical-regulation conformity and announce of
technical-regulation conformity in accordance with requirements specified at chapter
2 of this Regulation, ensure the safety requirements of cylinders for LPG as
the announced content and perform responsibilities specified in other relevant
legal documents.
Cylinders
for LPG produced domestically, imported from July 01, 2014 must be announced
technical-regulation conformity and fastened the seal of technical-regulation
conformity.
Article
19. Organizations and individuals
producing, importing, trading in cylinders for LPG must ensure quality of
products and goods, and label of goods for cylinders for LPG in accordance with
this Regulation and current legislations.
Chapter
5.
ORGANIZATION OF IMPLEMENTATION
Article
20. The Industrial Safety Techniques
and Environment Agency shall coordinate with relevant agencies and units in
guiding and organizing implementation of this Regulation.
Basing on
requirements of management, the Industrial Safety Techniques and Environment
Agency shall propose the Minister of Industry and Trade for amendments and
supplementations to this Regulation.
Article
21. The Services of Industry and Trade of
provinces and central-affiliated cities shall coordinate with relevant agencies
and units in guiding and organizing implementation of this Regulation in their
localities.
Annually,
the provincial Services of Industry and Trade shall sum up, report to the
Ministry of Industry and Trade (the Industrial Safety Techniques and
Environment Agency) about problems, proposals involving cylinders for LPG in
localities managed by them.
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