Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
According to the requirements of Document JIANBIAO [2012] No.5 issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China - Notice on printing and distributing the development and revision plan on engineering construction standards and codes in 2012, the drafting group of Standard for building water supply and drainage has revised this standard through extensive investigation and study, careful summarization of practical experience and reference to relevant international and foreign advanced standards and on the basis of widely soliciting for opinions.
The main technical contents of this standard are general provisions, terms and symbols, water supply, sanitary wastewater, rain drainage, hot water and drinking water supply, etc.
The main technical contents revised in this standard are: 1. the average daily rated domestic water consumption for residential and public buildings is supplemented; 2. the dormitory classification and maximum daily hourly variation coefficient are adjusted; 3. the calculation method for the diameter of header pipe for the outdoor water supply in sub-district is adjusted; 4. the provisions on the calculation of design peak flow of water main of the building complex or the different functional parts of the same building are added; 5. the provisions on bottled liquid chlorine disinfection used for swimming pools and aquatic recreation pools are deleted; 6. the provisions on vacuum drainage are deleted; 7. the provisions on ozone disinfection safety for swimming pools and aquatic recreation pools are added; 8. the provisions of arranging grilling covers for water inlet, pool bottom water outlet and drain opening of swimming pools and aquatic recreation pools as well as those on the velocity of water flow passing the grilling are added; 9. the discharging capacity of floor drain is supplemented; 10. the maximum design drainage capacity of the vertical pipe for sanitary wastewater is adjusted; 11. the load of the drainage piping discharging separately without ventilation has been modified; 12. the conditions for setting the air admittance valve in the case that the drainage stack of public buildings is not extended to top for venting are added; 13. the provisions on the minimum width and depth of roof gutter (catchwater channel) are supplemented; 14. the provisions on the maximum design discharge flow of the roof drain and the piping design calculation are separately made for the roof rainwater according to single bucket system, gravity flow multi-bucket system and full pipe pressure flow multi-bucket system; 15. the requirements of sponge city for rainwater design for building and sub-district are added; 16. the calculation of design duration of rainfall of rainwater piping in sub-district is modified according to the current national standard GB 50014 Code for design of outdoor wastewater engineering; 17. the relevant requirements for setting rainwater detention tank in sub-district are supplemented; 18. the provisions on setting sterilization facilities for centralized hot water supply system are added; 19. the technical measures to ensure the effect of the circulation system of centralized hot water supply system are added; 20. the traditional storage type heat exchanger with low efficiency is eliminated and the half storage type heat exchanger with superior performance is recommended; 21. the contents regarding solar heat pump hot water supply system are added; 22. the provisions on various parameters for calculating the total area of solar thermal collector are supplemented; 23. the provisions on the selection of solar hot water system for different types of buildings under different conditions are added; 24. the range of heat loss values for distribution pipes is revised; 25. the flow calculation formula of circulating pump is revised; 26. the provisions on calculating the flow of the hot water supply pump and circulating pump of hot water storage tank are added.
The provisions printed in bold type in this standard are compulsory and must be enforced strictly.
Ministry of Housing and Urban-Rural Development is in charge of the administration of this standard and the explanation of the compulsory provisions, Shanghai Municipal Commission of Housing and Urban-Rural Development is responsible for the specific administration, and Arcplus Group PLC is responsible for the explanation of the specific technical contents. In case of any comment or suggestion during the process of implementing this standard, please send it to Arcplus Group PLC (address: National Standard Standard for design of building water supply and drainage Management Group, No.18, Lane 600, Nanchezhan Road, Shanghai; postal Code: 200011; email: GB50015_2019@163.com).
Standard for design of building water supply and drainage
1 General provisions
1.0.1 This standard is developed in order to ensure the design quality of building water supply and drainage engineering and meet the basic requirements of safety, sanitation, applicability, economy and green.
1.0.2 This standard is applicable to the design of domestic water supply and drainage engineering in civil buildings, industrial buildings and sub-districts and the design of rainwater drainage engineering in sub-districts.
1.0.3 Where the height of the building exceeds 250m, the design of water supply and drainage system of the building shall meet the provisions of this standard, for which special research and demonstration shall be carried out.
1.0.4 The building water supply and drainage design shall not only meet the use requirements, but also provide convenient conditions for construction and installation, operation management, maintenance and check, and safety protection.
1.0.5 For the design of building water supply and drainage engineering, this standard shall be implemented and the requirements of current relevant standards of the nation shall be met.
2 Terms and symbols
2.1 Terms
2.1.1
drinking water
domestic water with its quality meeting the requirements for daily drinking, washing, etc. specified in national standards for drinking water quality
2.1.2
non-drinking water
water, other than drinking water, used for flushing toilets, washing cars, sprinkling roads, watering and afforesting, and supplementing air conditioning circulating water and landscape water
2.1.3
secondary water supply
water supply mode in which water is supplied to users or used by oneself through facilities for storage, pressurization, etc. when the demand of civil and industrial buildings on drinking water pressure and volume exceeds the capability of the water supply network of public or self-constructed water supply facilities
2.1.4
hourly variation coefficient
ratio of maximum hourly water consumption to average hourly water consumption
2.1.5
maximum hourly water consumption
hourly water consumption during the maximum daily water consumption period
2.1.6
average hourly water consumption
average hourly water consumption during the maximum daily water consumption period
2.1.7
backflow pollution
pollution of domestic water supply system caused by back-pressure back flow or siphonage back flow
2.1.8
back-pressure back flow
backflow caused by the change of downstream pressure of the water supply system which causes the water pressure at the water use end to be higher than that at the water supply end
2.1.9
siphonage back flow
backflow of water or liquid mixture from plumbing fixtures or water receiver to domestic water supply system caused by the negative pressure in the water supply piping
2.1.10
air gap
the vertical spatial distance between the lowest point of the outlet of the pipeline or tap outlet and the overflow level of the water equipment in the case of a water supply system or the vertical spatial distance between the lowest point of the building drain opening of an indirect drainage equipment or container and the overflow level of the water receiver in the case of a drainage system
2.1.11
flood-level rim
overflow upper edge of fixtures
2.1.12
backflow preventer
device consisting of non-return components that can prevent the water flow in the water supply piping from flowing back
2.1.13
vacuum breaker
device that is able to introduce atmospheric pressure into the water supply piping to avoid backflow of water in such water supply piping due to siphonage
2.1.14
service pipe
pipe section connecting the municipal piping to the water supply network in sub-district, or pipe section introducing the water supply inter-building pipe in sub-district into the building
2.1.15
inter-building pipe
water supply and drainage piping arranged around the building and directly connected with the building service pipe and building drain
2.1.16
inlet pipe
domestic water supply pipe section from the water supply system to each household
2.1.17
vertical division zone
several water supply zones divided on the building water supply system along its vertical height
2.1.18
parallel water supply
water supply mode with each vertical water supply division zone of building having an independent pressurization (depressurization) system
2.1.19
series water supply
water supply mode with each vertical water supply division zone of building pressurizing (depressurizing) in a cascade stage manner
2.1.20
pressure superposed water supply
water supply mode with the water supply equipment directly absorbing water from a pressurized water supply network for pressurizing
2.1.21
exposed installation
method of laying the indoor piping in an exposed manner
2.1.22
concealed installation, embedded installation
method of installing the indoor piping in wall pipe chase, piping shaft or pipe ditch or concealing it by architectural decorations
2.1.23
manifold
pipe fittings for multi-branch pipeline
2.1.24
self-provided water source
water sources other than drinking water provided by urban water supply network
2.1.25
plumbing fixture, fixture
container or device that supplies water and receives and discharges sewage and waste water or dirt
GB 50015-2019 Standard for design of building water supply and drainage English
Foreword ii
1 General provisions
2 Terms and symbols
2.1 Terms
2.2 Symbols
3 Water supply
3.1 General requirements
3.2 Rated water consumption and water pressure
3.3 Water quality and contamination prevention
3.4 System selections
3.5 Pipes, appurtenances and water meters
3.6 Piping layout and installation
3.7 Design flow and pipe hydraulic calculation
3.8 Water tanks and reservoirs
3.9 Pressurizing equipment and pump house
3.10 Swimming pools and aquatic recreation pools
3.11 Circulating cooling water and cooling towers
3.12 Waterscape
3.13 Outdoor water supply in sub-district
4 Sanitary wastewater
4.1 General requirements
4.2 Drainage systems selection
4.3 Plumbing fixtures, floor drains and traps
4.4 Piping layout and installation
4.5 Hydraulic calculation of drainage piping
4.6 Pipes, fittings
4.7 Vent pipes
4.8 Sewage pumps and sump
4.9 Small sanitary waste treatment
4.10 Sanitary wastewater in sub-district
5 Rain drainage
5.1 General requirements
5.2 Building rainwater
5.3 Outdoor rainwater in sub-district
6 Hot water and drinking water supply
6.1 General requirements
6.2 Rated consumption, temperature and hot water quality
6.3 Hot water supply systems selections
6.4 Calculation of heat consumption, hot water consumption and heat supply of heating equipment
6.5 Water heating and storage
6.6 Hot water supply systems of solar and heat pump
6.7 Calculation for hot water pipe net
6.8 Pips, appurtenances and piping installation
6.9 Drinking water supply
Annex A Hazard degree of backflow & the selection of backflow prevention facilities
Annex B Values of coefficient αc in the formula for calculating simultaneous outflow probability of water supply fixture unit in the water supply pipe section
Annex C Calculation of design peak flow of water supply pipe section
Annex D Equivalent length for friction loss of valves and threaded fittings
Annex E Minimum clearance between underground pipelines (structures) for sub-districts
Annex F Calculation for the discharge volume of roof rainwater overflow facilities
Annex G Maximum design discharge capacity of vertical pipes for gravity flow system
Annex H Distribution of solar energy resources in China and their corresponding characteristics
Annex J Calculation of the number of drinking water taps for simultaneous use
Explanation of wording in this standard
List of quoted standards
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
According to the requirements of Document JIANBIAO [2012] No.5 issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China - Notice on printing and distributing the development and revision plan on engineering construction standards and codes in 2012, the drafting group of Standard for building water supply and drainage has revised this standard through extensive investigation and study, careful summarization of practical experience and reference to relevant international and foreign advanced standards and on the basis of widely soliciting for opinions.
The main technical contents of this standard are general provisions, terms and symbols, water supply, sanitary wastewater, rain drainage, hot water and drinking water supply, etc.
The main technical contents revised in this standard are: 1. the average daily rated domestic water consumption for residential and public buildings is supplemented; 2. the dormitory classification and maximum daily hourly variation coefficient are adjusted; 3. the calculation method for the diameter of header pipe for the outdoor water supply in sub-district is adjusted; 4. the provisions on the calculation of design peak flow of water main of the building complex or the different functional parts of the same building are added; 5. the provisions on bottled liquid chlorine disinfection used for swimming pools and aquatic recreation pools are deleted; 6. the provisions on vacuum drainage are deleted; 7. the provisions on ozone disinfection safety for swimming pools and aquatic recreation pools are added; 8. the provisions of arranging grilling covers for water inlet, pool bottom water outlet and drain opening of swimming pools and aquatic recreation pools as well as those on the velocity of water flow passing the grilling are added; 9. the discharging capacity of floor drain is supplemented; 10. the maximum design drainage capacity of the vertical pipe for sanitary wastewater is adjusted; 11. the load of the drainage piping discharging separately without ventilation has been modified; 12. the conditions for setting the air admittance valve in the case that the drainage stack of public buildings is not extended to top for venting are added; 13. the provisions on the minimum width and depth of roof gutter (catchwater channel) are supplemented; 14. the provisions on the maximum design discharge flow of the roof drain and the piping design calculation are separately made for the roof rainwater according to single bucket system, gravity flow multi-bucket system and full pipe pressure flow multi-bucket system; 15. the requirements of sponge city for rainwater design for building and sub-district are added; 16. the calculation of design duration of rainfall of rainwater piping in sub-district is modified according to the current national standard GB 50014 Code for design of outdoor wastewater engineering; 17. the relevant requirements for setting rainwater detention tank in sub-district are supplemented; 18. the provisions on setting sterilization facilities for centralized hot water supply system are added; 19. the technical measures to ensure the effect of the circulation system of centralized hot water supply system are added; 20. the traditional storage type heat exchanger with low efficiency is eliminated and the half storage type heat exchanger with superior performance is recommended; 21. the contents regarding solar heat pump hot water supply system are added; 22. the provisions on various parameters for calculating the total area of solar thermal collector are supplemented; 23. the provisions on the selection of solar hot water system for different types of buildings under different conditions are added; 24. the range of heat loss values for distribution pipes is revised; 25. the flow calculation formula of circulating pump is revised; 26. the provisions on calculating the flow of the hot water supply pump and circulating pump of hot water storage tank are added.
The provisions printed in bold type in this standard are compulsory and must be enforced strictly.
Ministry of Housing and Urban-Rural Development is in charge of the administration of this standard and the explanation of the compulsory provisions, Shanghai Municipal Commission of Housing and Urban-Rural Development is responsible for the specific administration, and Arcplus Group PLC is responsible for the explanation of the specific technical contents. In case of any comment or suggestion during the process of implementing this standard, please send it to Arcplus Group PLC (address: National Standard Standard for design of building water supply and drainage Management Group, No.18, Lane 600, Nanchezhan Road, Shanghai; postal Code: 200011; email: GB50015_2019@163.com).
Standard for design of building water supply and drainage
1 General provisions
1.0.1 This standard is developed in order to ensure the design quality of building water supply and drainage engineering and meet the basic requirements of safety, sanitation, applicability, economy and green.
1.0.2 This standard is applicable to the design of domestic water supply and drainage engineering in civil buildings, industrial buildings and sub-districts and the design of rainwater drainage engineering in sub-districts.
1.0.3 Where the height of the building exceeds 250m, the design of water supply and drainage system of the building shall meet the provisions of this standard, for which special research and demonstration shall be carried out.
1.0.4 The building water supply and drainage design shall not only meet the use requirements, but also provide convenient conditions for construction and installation, operation management, maintenance and check, and safety protection.
1.0.5 For the design of building water supply and drainage engineering, this standard shall be implemented and the requirements of current relevant standards of the nation shall be met.
2 Terms and symbols
2.1 Terms
2.1.1
drinking water
domestic water with its quality meeting the requirements for daily drinking, washing, etc. specified in national standards for drinking water quality
2.1.2
non-drinking water
water, other than drinking water, used for flushing toilets, washing cars, sprinkling roads, watering and afforesting, and supplementing air conditioning circulating water and landscape water
2.1.3
secondary water supply
water supply mode in which water is supplied to users or used by oneself through facilities for storage, pressurization, etc. when the demand of civil and industrial buildings on drinking water pressure and volume exceeds the capability of the water supply network of public or self-constructed water supply facilities
2.1.4
hourly variation coefficient
ratio of maximum hourly water consumption to average hourly water consumption
2.1.5
maximum hourly water consumption
hourly water consumption during the maximum daily water consumption period
2.1.6
average hourly water consumption
average hourly water consumption during the maximum daily water consumption period
2.1.7
backflow pollution
pollution of domestic water supply system caused by back-pressure back flow or siphonage back flow
2.1.8
back-pressure back flow
backflow caused by the change of downstream pressure of the water supply system which causes the water pressure at the water use end to be higher than that at the water supply end
2.1.9
siphonage back flow
backflow of water or liquid mixture from plumbing fixtures or water receiver to domestic water supply system caused by the negative pressure in the water supply piping
2.1.10
air gap
the vertical spatial distance between the lowest point of the outlet of the pipeline or tap outlet and the overflow level of the water equipment in the case of a water supply system or the vertical spatial distance between the lowest point of the building drain opening of an indirect drainage equipment or container and the overflow level of the water receiver in the case of a drainage system
2.1.11
flood-level rim
overflow upper edge of fixtures
2.1.12
backflow preventer
device consisting of non-return components that can prevent the water flow in the water supply piping from flowing back
2.1.13
vacuum breaker
device that is able to introduce atmospheric pressure into the water supply piping to avoid backflow of water in such water supply piping due to siphonage
2.1.14
service pipe
pipe section connecting the municipal piping to the water supply network in sub-district, or pipe section introducing the water supply inter-building pipe in sub-district into the building
2.1.15
inter-building pipe
water supply and drainage piping arranged around the building and directly connected with the building service pipe and building drain
2.1.16
inlet pipe
domestic water supply pipe section from the water supply system to each household
2.1.17
vertical division zone
several water supply zones divided on the building water supply system along its vertical height
2.1.18
parallel water supply
water supply mode with each vertical water supply division zone of building having an independent pressurization (depressurization) system
2.1.19
series water supply
water supply mode with each vertical water supply division zone of building pressurizing (depressurizing) in a cascade stage manner
2.1.20
pressure superposed water supply
water supply mode with the water supply equipment directly absorbing water from a pressurized water supply network for pressurizing
2.1.21
exposed installation
method of laying the indoor piping in an exposed manner
2.1.22
concealed installation, embedded installation
method of installing the indoor piping in wall pipe chase, piping shaft or pipe ditch or concealing it by architectural decorations
2.1.23
manifold
pipe fittings for multi-branch pipeline
2.1.24
self-provided water source
water sources other than drinking water provided by urban water supply network
2.1.25
plumbing fixture, fixture
container or device that supplies water and receives and discharges sewage and waste water or dirt
Contents of GB 50015-2019
GB 50015-2019 Standard for design of building water supply and drainage English
Foreword ii
1 General provisions
2 Terms and symbols
2.1 Terms
2.2 Symbols
3 Water supply
3.1 General requirements
3.2 Rated water consumption and water pressure
3.3 Water quality and contamination prevention
3.4 System selections
3.5 Pipes, appurtenances and water meters
3.6 Piping layout and installation
3.7 Design flow and pipe hydraulic calculation
3.8 Water tanks and reservoirs
3.9 Pressurizing equipment and pump house
3.10 Swimming pools and aquatic recreation pools
3.11 Circulating cooling water and cooling towers
3.12 Waterscape
3.13 Outdoor water supply in sub-district
4 Sanitary wastewater
4.1 General requirements
4.2 Drainage systems selection
4.3 Plumbing fixtures, floor drains and traps
4.4 Piping layout and installation
4.5 Hydraulic calculation of drainage piping
4.6 Pipes, fittings
4.7 Vent pipes
4.8 Sewage pumps and sump
4.9 Small sanitary waste treatment
4.10 Sanitary wastewater in sub-district
5 Rain drainage
5.1 General requirements
5.2 Building rainwater
5.3 Outdoor rainwater in sub-district
6 Hot water and drinking water supply
6.1 General requirements
6.2 Rated consumption, temperature and hot water quality
6.3 Hot water supply systems selections
6.4 Calculation of heat consumption, hot water consumption and heat supply of heating equipment
6.5 Water heating and storage
6.6 Hot water supply systems of solar and heat pump
6.7 Calculation for hot water pipe net
6.8 Pips, appurtenances and piping installation
6.9 Drinking water supply
Annex A Hazard degree of backflow & the selection of backflow prevention facilities
Annex B Values of coefficient αc in the formula for calculating simultaneous outflow probability of water supply fixture unit in the water supply pipe section
Annex C Calculation of design peak flow of water supply pipe section
Annex D Equivalent length for friction loss of valves and threaded fittings
Annex E Minimum clearance between underground pipelines (structures) for sub-districts
Annex F Calculation for the discharge volume of roof rainwater overflow facilities
Annex G Maximum design discharge capacity of vertical pipes for gravity flow system
Annex H Distribution of solar energy resources in China and their corresponding characteristics
Annex J Calculation of the number of drinking water taps for simultaneous use
Explanation of wording in this standard
List of quoted standards
