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Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Design Code for Building Water Supply and Drainage
GBJ15—88
1988 Beijing
Engineering Construction Standard Full-text Information System
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National Standard of the People's Republic of China
Design Code for Building Water Supply and Drainage
Editing Department: Shanghai Civil Architectural Design Institute Approving Department: Ministry of Construction of the People's Republic of China Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Notice on the Release of the National Standard "Design Code for Building Water Supply and Drainage"
(88)Jianbiaozi No. 196
According to the requirements of the former State Construction Commission's (81)Jianfashezi No. 546 document, the "Design Code for Indoor Water Supply and Drainage and Hot Water Supply" revised jointly by the Shanghai Construction Commission and relevant departments has been revised. After review by relevant departments, the revised "Code for Design of Building Water Supply and Drainage" GBJ15-88 is now approved as a national standard, which will be implemented on April 1, 1989. The original "Code for Design of Indoor Water Supply and Drainage and Hot Water Supply" TJ15-74 is abolished at the same time.
This code is managed by the Shanghai Construction Committee, and the specific interpretation and other work is the responsibility of the Shanghai Civil Building Design Institute. The publication and distribution is the responsibility of China Planning Press. Ministry of Construction of the People's Republic of China
August 24, 1988
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Announcement on Partial Revision of Engineering Construction Standards
No. 6
The national standard "Code for Design of Building Water Supply and Drainage" GBJ15-88V has been partially revised by Shanghai Architectural Design Institute in conjunction with relevant units. It has been reviewed by relevant departments and the partially revised provisions are now approved for implementation on January 1, 1998. The provisions of the corresponding provisions in the code are abolished at the same time. This is hereby announced. Ministry of Construction of the People's Republic of China
September 1, 1997
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Engineering Construction Standards Full Text Information System
Revision Notes
This specification is based on the notification of the former National Construction Commission (81) Jianfa Shezi No. 546 document, and is revised by the Shanghai Civil Architectural Design Institute and relevant units to the original "Indoor Water Supply, Drainage and Hot Water Supply Design Specification" TJ15-74. During the revision process, a relatively extensive investigation and research was conducted, the experience since the implementation of the original specification was carefully summarized, some scientific research results were absorbed, and the opinions of relevant units were solicited. After review organized by our commission, the draft for approval was completed. This specification is divided into four chapters. The main contents of the revision are: water quota, calculation formula for design second flow of domestic water supply pipes for residential and public buildings, calculation method for design second flow of domestic sewage drainage, and design method of rainwater channels. This code also adds the content of water supply and drainage of high-rise buildings, ventilation system of drainage pipes and disinfection of hospital sewage, and adds two sections on swimming pools and fountains. Other aspects such as prevention of water pollution, water and energy conservation, safe water supply, and new pipe materials have also been modified and supplemented. In the process of implementing this code, if you find that there are places that need to be modified or supplemented, please send your opinions and relevant materials to Shanghai Civil Architecture Design Institute and copy to our committee for reference when revising it.
Shanghai Municipal Construction Committee
March 1983
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Main symbols
Flow rate, flow rate
1 Water supply flow
Sewage flow
1 Rated flow rate of sanitary ware water supply
-Sanitary ware drainage flow
Fire extinguishing jet water flow
Daily hot water consumption per person
Hourly water consumption of hot water for sanitary ware
Circulation flow
Circulation additional flow
-Maximum flow| |tt||Water output of the pump
Design flow of rainwater
Rainfall intensity for 5 minutes
Flow capacity of water meter
Characteristic flow of water meter
Average water flow velocity in the pipeline
Water pressure, head loss
R——Hydraulic radius
I——Hydraulic slope
Az——Specific resistance of water hose
HFor example, the required water pressure at the outlet of a fire hydrant
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Engineering Construction Standard Full-text Information System
ha——Head loss of water hose
H. 1. The water pressure required for the nozzle of a water gun to create a water column of a certain height i - the head loss per unit length of the pipeline
H - the natural pressure value of a circulation pipe
- the head loss of the circulation flow through the distribution network The head loss of the circulation flow through the return network - the head of the pump
Geometric characteristics
Fr - heating area
- catchment area
h, H -
- length of the water belt || tt||One height
One elevation difference
Total volume of air and water in the pressure water tank
V——Water volume in the pressure water tank
d——Calculated inner diameter of the pipe
Calculation coefficient
Coefficient determined according to the purpose of the building
Percentage of sanitary appliances supplying water and draining water at the same time, and percentage of sanitary appliances used at the same time
Water flow characteristic coefficient
Pressure water tank Ratio of minimum working pressure to maximum working pressure inside - safety factor of atmospheric water supply
- additional coefficient of volume of atmospheric water supply tank
pipe roughness coefficient
K - heat transfer coefficient
Kb - water meter characteristic coefficient
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
K - coefficient of design recurrence period of one year and roof leakage capacity e - coefficient of scaling and uneven distribution of heat medium affecting heat transfer efficiency Ct - heat loss coefficient of hot water supply system Heat, temperature and specific gravity
Q - design hourly heat consumption
Q - heat required to prepare hot water
Q: - heat loss of water distribution pipeline
- hot water temperature
- cold water temperature
- temperature difference
specific gravity of water
c - specific heat of water
N. Total water supply equivalent of sanitary appliances in one pipe section Total water discharge equivalent of sanitary appliances in one pipe section Np
Number of sanitary appliances of the same type
Number of water consumption calculation units
nmax——Maximum number of times a water pump starts within one hourFull-text information system of engineering construction standards
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Chapter 1
Chapter 2
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Section 8||tt| |Section 9
Section 10
Chapter 3
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Section 8
Section 9
Section 10
Chapter 4
Section 1
Water quota and water pressure
Water quality and water pollution
Pipeline layout and laying
Pipes, accessories and water meters
Design flow and pipeline hydraulic calculation
Water pumps, suction wells and water storage tanks
Water tank and air pressure water supply equipment
Sanitary appliances, floor drains and traps
Pipeline layout and laying
Drainage pipeline calculation
Pipes, accessories and inspection wells
Sewage pump room and sump
Local sewage treatment
Hot water disinfection treatment in hospitals
Hot water and drinking water supply
Hot water quota, water temperature and water quality
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Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Appendix—
Appendix 2
Additional Notes
Selection of Hot Water Supply System
Calculation of Hot Water Quantity and Heat Consumption
Water Heating and Storage
Pipes, Accessories and Pipeline Laying
Terms Used in This Code
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China Electric Power Center
Engineering Construction Standard Full Text Information System
Chapter 1 General
Article 1.0.1 This specification is formulated to ensure the quality of building water supply and drainage design and make the design meet the basic requirements of applicability, economy, safety, and hygiene. Article 1.0.2 The design of building water supply and drainage should meet the requirements of life, production, and fire protection, and at the same time provide convenient conditions for construction and installation, operation management, maintenance and inspection, and safety protection.
Article 1.0.3 This code applies to the design of water supply and drainage for industrial and civil buildings, but when designing the following projects, it shall also be implemented in accordance with the current relevant special codes or regulations: 1. Buildings in areas with collapsible loess, permafrost and swelling and shrinking soil; 2. Buildings with an earthquake fortification intensity of 10 degrees; 3. Mineral spas, civil air defense buildings and radioactive production processes that cause explosions when in contact with water, etc., with special requirements for water supply, drainage and hot water supply. Article 1.0.4 In addition to implementing this code, the design of building water supply and drainage projects shall also comply with the requirements of the current relevant national standards and specifications. Engineering Construction Standard Full Text Information System
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Chapter 2
Section 1 Water Quota and Water Pressure
Article 2.1.1 The residential water quota and hourly variation coefficient shall be determined according to Table 2.1.1 based on the residential type, building standards, degree of perfection of sanitary appliances and regional conditions.
Residential domestic water quota and hourly variation coefficientResidential category
Sanitary ware installation standard
With toilet, wash basin, no bathing facilitiesWith toilet, wash basin and bathing facilities
Domestic water quota
Unit quota (maximum daily)
85~130
130~190
With toilet, wash basin, bathing facilities and hot water supply170~250 per day
High-end residences and villasWith toilet, wash basin, bathing facilities and hot water supply2.5~2.0
300~4002.3~1.8
Note: When there are specific regulations on residential domestic water quotas locally, they can be implemented according to local regulations. Article 2.1.2 The living water quota and hourly variation coefficient of dormitories, hotels and other public buildings shall be determined according to Table 2.1.2 based on the degree of perfection of sanitary appliances and regional conditions.
Dormitories, hotels and public buildings living water quota and hourly variation coefficient Table 2.1.2bzxZ.net
Building name
Dormitories
Washing room
Washing room and bathroom
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Per person per day
Per person per day
Living water quota
(maximum day)
50~100
100~200
Hourly variation
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