QCVN
27:2025/BNNMT
NATIONAL TECHNICAL REGULATION ON VIBRATION
Foreword
QCVN 27:2025/BNNMT is
compiled by the Department of Environment, proposed by the Department of
Science and Technology, appraised by the Ministry of Science and Technology of
Vietnam, and promulgated by the Minister of Agriculture and Environment of
Vietnam under Circular No. 01/2025/TT-BNNMT dated May 15, 2025.
QCVN 27:2025/BNNMT
replaces QCVN 27:2010/BTNMT.
NATIONAL
TECHNICAL REGULATION ON VIBRATION
1. GENERAL PROVISIONS
1.1.
Scope
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
This Regulation
provides for vibration generated from production, business, and service
facilities, construction works in progress, traffic vehicles, and civic
activities.
This Regulation shall
not be applied to assess vibration encountered in the labor environment or
workplace or in the premises of production, construction, trade, and service
facilities affected by their own vibration.
1.2.
Regulated entities
This Regulation applies
to environmental authorities, organizations, and individuals relevant to vibration
generation in the territory of the Socialist Republic of Vietnam.
1.3.
Interpretation of terms
1.3.1. Vibration in this
regulation refers to strong shaking generated by devices, machinery,
instruments, tools, and other sources, which affects specific areas and causes
discomfort to humans.
1.3.2. Affected areas refer to
areas where vibration measurement, monitoring, and control are carried out.
1.3.3. Production, business,
and service facilities and civic activities that can cause vibration include:
1.3.3.1. Production, business,
and service facilities and civic activities that use devices, machinery,
instruments, and tools that generate vibration by capacity, type, and quantity
are prescribed in the Appendix enclosed with this Regulation.
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
1.3.4. Background vibration
level refers to the vibration level measured at the measurement location of an
affected area when no vibration is generated from the vibration source to be
measured.
1.3.5. Vibration
classification
- Continuous vibration
refers to vibration generated continuously from a determined source within a
specific duration without interruption;
- Impulsive vibration
refers to vibration that peaks and decays abruptly over a short duration (less
than 2 seconds) from a determined vibration source that may recur during the
measurement duration;
- Intermittent
vibration refers to vibration generated continuously from a determined
vibration source that is interrupted for a specific duration, with each
vibration generation lasting at least 2 seconds. Intermittent vibration may be
the combination of multiple impulsive vibrations.
1.3.6. Measurement duration
refers to the duration used as the vibration generation duration during which
the measurement is carried out continuously.
1.3.7. Vibration acceleration
A refers to the time derivative of vibration velocity
1.3.8. Root mean square
(r.m.s) value of vibration acceleration refers to the root mean square value of
acceleration, measured directly using a vibration meter or determined using the
following formula:
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
a(t): vibration
acceleration (m/s2)
T: measurement duration
(s)
1.3.9. Equivalent peak value
(EQ peak) refers to the average of the peak values of vibration acceleration
over a specific duration.
1.3.10. Vibration acceleration
(VLA) refers to the unit in dB, calculated using the following
formula:
A refers to vibration
acceleration measured directly on the meter according to r.m.s or determined
using the following formula:
An(m/s2)
refers to r.m.s vibration acceleration at frequency n (Hz);
an refers to
coefficient at frequency band n (Hz), as guided in the Appendix of TCVN
6963:2001;
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
1.3.11. Calibrated vibration
acceleration level (VLw) refers to the vibration acceleration level
after calibrating influencing factors according to each frequency band.
1.3.12. Integral equivalent
vibration acceleration level (VLeq) refers to the average value of
the calibrated vibration acceleration level over a specific duration. The
equivalent vibration acceleration level shall be measured directly on an
integral meter or determined using the following formula:
Where:
VLw (t)
refers to the equivalent vibration acceleration level over determined
measurement duration (dB);
T: measurement duration.
1.3.13. 90th percentile
vibration acceleration level (L90) refers to the vibration acceleration level
that is exceeded for 90% of the measurement duration.
1.3.14. Maximum integral
equivalent vibration acceleration level (VLmax) refers to the maximum
value of the equivalent vibration level over a determined duration.
2. TECHNICAL PROVISIONS
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
The classification of
affected areas in this Regulation shall be carried out as follows:
2.1.1. Area A includes
the following facilities and works:
- Educational
institutions according to the Law on Education and vocational education
institutions according to the Law on Vocational Education;
- Medical examination
and treatment facilities according to the Law on Medical Examination and
Treatment; senior care facilities according to the Law on the Elderly;
- Museums and
libraries;
- Religious works;
- Offices of agencies
of the CPV, National Assembly of Vietnam, Government of Vietnam, and President
of Vietnam and offices of Ministries, central authorities, People’s Committees,
and affiliates at various levels; headquarters of political organizations,
socio-political organizations, and socio-vocational political organizations and
headquarters and offices of organizations and individuals.
2.1.2. Area B includes
the following facilities and works:
- Houses: apartment
buildings and other types of collective houses; separate houses;
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
2.1.3. Area C includes
the following facilities and works:
- Outdoor and indoor
works of sports;
- Parks;
- Conference centers,
theaters, cultural houses, clubs, cinemas, circuses, dance halls,
amusement/entertaining works, and other cultural works;
- Livestock, cultivation,
and aquaculture facilities.
- Malls, supermarkets,
markets, stores, restaurants, and other similar works.
2.1.4. Area D includes
the following facilities and works:
- Airport, waterway,
and railway terminals, bus stations, and parking lots;
- Concentrated
production, business, and service areas and industrial works according to the
law;
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
- Other works.
2.2.
Permissible maximum value of vibration generated from production, business, and
service facilities and civic activities according to Section 1.3.3.1 measured
in affected areas
The permissible maximum
value of vibration generated from production, business, and service facilities and
civic activities according to Section 1 measured in affected areas is
prescribed in Table 1.
Table
1. Permissible maximum value of vibration generated from production, business,
and service facilities and civic activities according to Section 1.3.3.1
[Unit:
dB]
Affected
area
Period
Day
(06:00 ~ before 22:00)
Night
(22:00 ~ before 06:00)
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
60
55
Area B
65
60
Area C
70
65
Area D
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
70
Where:
It is permitted to
adjust the permissible maximum value threshold for vibration generated from
production, business, and service facilities and civic activities according to
Section 1.3.3.1 as follows:
Table
2. Adjustment values of thresholds according to vibration generation duration
from production, business, and service facilities and civic activities
according to Section 1.3.3.1
Vibration generation duration
Difference in value thresholds in Table
1 allowed to be adjusted
One of the following cases:
≤ 2 hours during the day
≤ 0,75 hour at night
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
One of the following cases:
> 2 hours and ≤ 4 hours during the day
> 0,75 hour and ≤ 1,5 hours at night
+5 dB
One of the following cases:
> 4 hours during the day
> 1,5 hours at night
Apply Table 1
2.3.
Permissible maximum value of vibration generated from other sources
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
Table
3. Permissible maximum value of vibration generated from other sources
[Unit:
dB]
Affected
area
Day
(06:00 ~ before 22:00)
Night
(22:00 ~ before 06:00)
Area A
65
60
Areas B, C, and D
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
65
Note:
Where vibration is
generated from construction sites in progress during the day, it is permitted
to adjust the permissible maximum value threshold for generated vibration
levels as follows:
Table
4. Adjustment values of thresholds according to vibration generation duration
during the day from construction sites in progress
Vibration generation duration
Difference in value thresholds in Table
3 allowed to be adjusted
≤ 2 hours per day
+10 dB
> 2 hours and ≤ 4 hours during the day
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
> 4 hours during the day
Apply Table 3
2.4.
Permissible maximum value for vibration generated from traffic vehicles
The permissible maximum
value for vibration generated from traffic vehicles is prescribed in Table 5.
Table
5. Permissible maximum value for vibration generated from traffic vehicles
[Unit:
dB]
Affected
area
Limit
Day
(06:00 ~ before 22:00)
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
Area A
65
60
Areas B, C, and D
70
65
2.5.
Adjustment value based on background vibration level
Continuous background
vibration level measurement shall be carried out in an affected area for at
least 5 minutes, using results VLeq as the background vibration
level.
- Where the background
vibration level is lower than the vibration level generated from the source to
be measured from 10 dB or more, the vibration level measurement results shall
be used for comparison and assessment according to the prescribed thresholds of
this Regulation.
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
Table
6. Adjustment value of measurement results based on background vibration level
Difference between
the vibration level and background vibration level in the measurement area
(dB)
3
4
÷ 5
6
÷ 9
Adjustment value of
the vibration level measurement results (dB)
-3
-2
-1
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
3.1. Vibration level
measurement locations
- The measurement
location is inside the boundary of an affected area;
- To determine the
effect of vibration on public areas and areas where people live and operate,
conduct measurement at specific points on the ground, floors, walls, road
surfaces, or solid surfaces; it is also permitted to conduct the measurement at
locations that may be most affected;
- The measurement
location shall have the nature of general representativeness, provide accurate
measurement results, and properly reflect the generated vibration.
3.2. Vibration level
meters
- The meters must meet
the technical characteristics for vibration level measurement; measurement
frequency bands of meters must be able to measure vibration levels generated
from the operations of production, business, and service facilities and
activities causing vibration in domestic activities and vibration levels from
traffic vehicles;
- Vibration meters must
display the vibration acceleration A, integral equivalent vibration
acceleration level (VLeq), 90th percentile vibration acceleration
level (VL90), and maximum integral equivalent vibration acceleration
level (VLmax).
3.3. Vibration level
measurement conditions
- When conducting the
measurement, it is necessary to avoid the impacts of other vibration sources
aside from the vibrating subject to be measured, such as magnetic fields,
strong winds, earthquakes, and other sources;
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
3.4. Vibration level
measurement duration
- The measurement
duration must be adequate to ensure statistical accuracy and confirm that the
measured vibration represents the affected subject being assessed. The
measurement duration must be written in the report.
- Vibration levels
shall be measured continuously during the measurement for at least 15 minutes. When
conducting a continuous measurement, use the measurement duration as the vibration
generation duration.
- Regarding impulsive vibration,
the vibration level measurement shall be carried out for at least 15 minutes. Where
a 15-minute measurement does not obtain 10 measurement values, continue the
measurement until there are 10 values.
3.5. Vibration level
measurement methods
Vibration shall be
measured simultaneously in all 3 perpendicular directions, ensuring that the
direction exhibiting the highest vibration level is determined and the
respective value is used for assessment. The methods for measuring vibration
and shock levels shall comply with the following standards:
- TCVN 6963:2001 –
Vibration and shock. Vibration emitted by construction works and factories.
Method of measurement;
- TCVN 6964-1:2001 –
Mechanical vibration and shock – Evaluation of human exposure to whole-body
vibration. Part 1: General requirements;
- TCVN 6964-2:2008 –
Mechanical vibration and shock – Evaluation of human exposure to whole-body
vibration. Part 2: Vibration in buildings (1 Hz to 80 Hz).
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
3.6.1. Regarding continuous
vibration
The measurement results
shall be used as the equivalent vibration acceleration level VLeq during the
measurement duration to calculate and assess conformity with this regulation.
3.6.2. Regarding
intermittent and impulsive vibration
The measurement results
shall be calculated using the arithmetic mean of the peak vibration values from
each occurrence regarding intermittent vibration or from each pulse as
follows:
- Measure the vibration
levels during the duration where measurement is required and record the values
of each occurrence of vibration;
- Determine the peak
measurement value of each occurrence of vibration;
- Calculate the
arithmetic mean of the peak vibration values from each occurrence of vibration.
The calculation results
shall be used to assess conformity with this Regulation.
4. MANAGEMENT PROVISIONS
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
4.2. When conducting the
measurement and assessment of the background vibration level, where the
background vibration level measured in the affected area has VLeq higher than
the respective level prescribed in this Regulation, refrain from conducting the
assessment of vibration generated from the vibration source to be measured and
adopt measures to reduce vibration generated to the affected area. Vibration
generation shall be assessed as complying and conforming with this Regulation
when the vibration level measurement and monitoring results in the affected
area do not exceed the respective permissible value prescribed in Section 2 on
technical provisions.
4.3. When the vibration
level in affected areas exceeds the respective permissible value prescribed in
this Regulation, state management authorities, organizations, and individuals
shall adopt measures to reduce the impacts of generated vibration on affected
areas.
4.4. The results of the
assessment of compliance and conformity with this Regulation shall be the
ground for state management authorities to conduct assessment and handling
according to the law.
5. RESPONSIBILITIES OF ORGANIZATIONS AND
INDIVIDUALS
5.1. Organizations and
individuals that may cause vibration shall ensure that the vibration levels
generated to affected areas do not exceed the permissible limit prescribed in
this Regulation.
5.2. State management
authorities shall conduct vibration level measurement and monitoring in
affected areas and develop comprehensive plans for vibration control, ensuring
compliance with the permissible limit prescribed in this Regulation.
6. IMPLEMENTATION
6.1. Environmental
authorities shall instruct, inspect, and supervise the implementation of this
Regulation.
6.2. Where any document
cited in this Regulation is amended or replaced, comply with its new edition./.
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
APPENDIX
List of types and quantities of devices generating
vibration regarding production, business, and service facilities and civic
activities
1. Non-hydraulic
presses with a capacity of 15kW or more;
2. Grinders (including
coarse and fine grinders) with a capacity of 22,5kW or more;
3. Forging machines with
a capacity of 22,5kW or more;
4. Rice mills with a
capacity of 22,5kW or more;
5. Wood processing
machines (planers, cutters, grinders, CNC machines, and drills) with a capacity
of 22,5kW or more;
6. Extrusion and
injection molding machines with a capacity of 37,5kW or more;
7. Coal briquette
machines with a capacity of 7,5kW or more;
...
...
...
Hãy đăng nhập hoặc đăng ký Thành viên
Pro tại đây để xem toàn bộ văn bản tiếng Anh.
Note: The capacity of
devices, machinery, and tools generating vibration shall be calculated for 1
device.