What are regulations on installing fire hydrant systems in facilities and warehouses in Vietnam?
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What are regulations on installing fire hydrant systems in facilities and warehouses in Vietnam? Thank you!
Installing fire hydrant systems in facilities and warehouses in Vietnam
Pursuant to Section 5.2.3 of the national technical regulations on fire safety for buldings and constructions issued together with the Circular 02/2021/TT-BXD stipulating as follows:
With respect to manufacturing facilities and warehouses constructed from materials that are prone to damage of fire, minimum water flow rate for determining pump capacity and amount of water reserved for firefighting specified in Schedule 12 must be increased in following cases:
- In case of steel structures that do not receive fire protections in buildings of fire-resistance category III, IV (level S2, S3), as well structures made from natural wood or pressed wood (which is wood that have been processed for fire protection), increase by 5 l/s.
- In case of flammable substances surrounding structures of buildings with fire-resistance category IV (level S2, S3), increase by 5 L/s for buildings with up to 10 000 m3 in volume. In case of buildings with more than 10 000 m3 in volume, increase flow rate by 5 L/s for every extra 100 000 m3 or for extra volume beyond the increased 100 000 m3.
Schedule 12 – Number of streams and minimum water flow rate for indoor firefighting in manufacturing facilities and warehouses
Fire-resistance categories of buildings
Fire and explosion hazard level of buildings
Minimum number of streams and water flow rate, l/s, for 1 stream, for indoor firefighting in manufacturing facilities and warehouses up to 50 m in height and by volume, 1 000 m3
≤ 0.5 and ≤ 5
> 5 and ≤ 50
> 50 and ≤ 200
> 200 and ≤ 400
> 400 and ≤ 800
(1)
(2)
(3)
(4)
(5)
(6)
(7)
I, II
A, B, C
2 x 2.5
2 x 5
2 x 5
3 x 5
4 x 5
III
C
2 x 2.5
2 x 5
2 x 5
1)
1)
III
D, E
2)
2 x 2.5
2 x 2.5
1)
1)
IV, V
C
2 x 2.5
2 x 5
1)
1)
1)
IV, V
D, E
2)
2 x 2.5
1)
1)
1)
1) Water flow rate and number of streams must be developed based on special technical documents.
2) No streams required.
NOTE 2: With respect to buildings whose fire-resistance ratings and fire hazard levels are not specified in Schedule 12, water flow rate shall conform to special technical documents.
Schedule 13 - Flow rate of water for firefighting depending on height of solid streams and diameter of nozzles
Height of solid stream, m
Flow rate of nozzles, L/s
Pressure, MPa, of fire hydrants with length of roller, m
Flow rate of nozzles, L/s
Pressure, MPa, of fire hydrants with length of roller, m
Flow rate of nozzles, L/s
Pressure, MPa, of fire hydrants with length of roller, m
10
15
20
10
15
20
10
15
20
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
Diameter of nozzle, mm
13
16
19
DN 50 fire hydrant 1)
6
-
-
-
-
2.6
0.092
0.096
0.100
3.4
0.088
0.096
0.104
8
-
-
-
-
2.9
0.120
0.125
0.130
4.1
0.129
0.138
0.148
10
-
-
-
-
3.3
0.151
0.157
0.164
4.6
0.160
0.173
0.185
12
2.6
0.202
0.206
0.210
3.7
0.192
0.196
0.210
5.2
0.206
0.223
0.240
14
2.8
0.236
0.241
0.245
4.2
0.248
0.255
0.263
-
-
-
-
16
3.2
0.316
0.322
0.328
4.6
0.293
0.300
0.318
-
-
-
-
18
3.6
0.390
0.398
0.406
5.1
0.360
0.380
0.400
-
-
-
-
DN 65 fire hydrant 1)
6
-
-
-
-
2.6
0.088
0.089
0.090
3.4
0.078
0.080
0.083
8
-
-
-
-
2.9
0.110
0.112
0.114
4.1
0.114
0.117
0.121
10
-
-
-
-
3.3
0.140
0.143
0.146
4.6
0.143
0.147
0.151
12
2.6
0.198
0.199
0.201
3.7
0.180
0.183
0.186
5.2
0.182
0.190
0.199
14
2.8
0.23
0.231
0.233
4.2
0.230
0.233
0.235
5.7
0.218
0.224
0.230
16
3.2
0.31
0.313
0.315
4.6
0.276
0.280
0.284
6.3
0.266
0.273
0.280
18
3.6
0.38
0.383
0.385
5.1
0.338
0.342
0.346
7.0
0.329
0.338
0.348
20
4.0
0.464
0.467
0.470
5.6
0.412
0.424
0.418
7.5
0.372
0.385
0.397
1) DN - Stands for Diameter Nominal, in mm
Installing fire hydrant systems in buildings, public buildings and administrative – auxiliary buildings of industrial construction in Vietnam
Pursuant to Section 5.2.1 and 5.2.2 stipulating as follows:
- Buildings, public buildings and administrative – auxiliary buildings of industrial constructions must be equipped with indoor fire hydrant systems, minimum water flow rate for firefighting is determined according to Schedule 11, in case of manufacturing facilities and warehouses, consult Schedule 12.
- When determining necessary water flow rate, rely to height of solid stream and diameter of nozzles in Schedule 13. In that case, calculate simultaneous operation of the nozzles and other fire suppression systems.
- NOTE: In case fire hydrants use equipment with specification not mentioned under Schedule 13, guarantee minimum water flowrate for firefighting of a stream and height of solid stream as per the law.
- For calculation of pump capacity and reserved water for firefighting, number of streams and water flow rate for firefighting in sections of public buildings that are situated at a height above 50 m must be 4 streams and 2.5 l/s per stream. With respect to F5 buildings with A, B or C fire hazard category with volume exceeding 50 000 m3, must be 4 streams and 5 l/s per stream.
Schedule 11 – Number of streams and minimum water flow rate for indoor fire hydrant systems
Residential buildings and public structures
Number streams per storey
Minimum flow rate for indoor firefighting, L/s, of 1 stream
1. Residential buildings, apartment buildings
≥ 5 and ≤ 16 storeys, when main corridors ≤ 10 m
1
2.5
≥ 5 and ≤ 16 storeys, when main corridors > 10 m
2
2.5
> 16 and ≤ 25 storeys, when main corridors ≤ 10 m
2
2.5
> 16 and ≤ 25 storeys, when main corridors > 10 m
3
2.5
2. Administrative buildings
≥ 6 and ≤ 10 storeys and volume of ≤ 25 000 m3
1
2.5
≥ 6 and ≤ 10 storeys and volume of > 25 000 m3
2
2.5
> 10 storeys and volume of ≤ 25 000 m3
2
2.5
> 10 storeys and volume of > 25 000 m3
3
2.5
3. Club rooms containing stages, theatres, cinemas, and rooms equipped with audiovisual devices (conference rooms, seminar rooms, etc.)
≤ 300 seats
2
2.5
> 300 seats
2
5.0
4. Dorms and public buildings (except Section 2)
≥ 6 and ≤ 10 storeys and volume of < 5 000 m3 or < 10 storeys and volume of ≥ 5 000 m3 and ≤ 25 000 m3
1
2.5
≤ 10 storeys and volume of > 25 000 m3
2
2.5
> 10 storeys and volume of ≤ 25 000 m3
2
2.5
> 10 storeys and volume of > 25 000 m3
3
2.5
5. Administrative – auxiliary buildings of industrial structures with volume
≥ 5 000 and ≤ 25 000 m3
1
2.5
> 25 000 m3
2
2.5
Best regards!
- Circular 02/2021/TT-BXD Download
-
Editorial Board of LawNet
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- Số 19 Nguyễn Gia Thiều, P. Võ Thị Sáu, Q.3, TP. HCM.
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