中华人民共和国住房和城乡建设部公告　第409号

修订说明

中华人民共和国建设部公告　第138号

前言

1　总则

2　术语、符号

• 2.1　术语

• 2.2　符号

3　给水

• 3.1　用水定额和水压

• 3.2　水质和防水质污染

• 3.3　系统选择

• 3.4　管材、附件和水表

• 3.5　管道布置和敷设

• 3.6　设计流量和管道水力计算

• 3.7　水塔、水箱、贮水池

• 3.8　增压设备、泵房

• 3.9　游泳池与水上游乐池

• 3.10　循环冷却水及冷却塔

• 3.11　水景

4　排水

• 4.1　系统选择

• 4.2　卫生器具及存水弯

• 4.3　管道布置和敷设

• 4.4　排水管道水力计算

• 4.5　管材、附件和检查井

• 4.6　通气管

• 4.7　污水泵和集水池

• 4.8　小型生活污水处理

• 4.9　雨水

5　热水及饮水供应

• 5.1　用水定额、水温和水质

• 5.2　热水供应系统选择

• 5.3　耗热量、热水量和加热设备供热量的计算

• 5.4　水的加热和贮存

• 5.5　管网计算

• 5.6　管材、附件和管道敷设

• 5.7　饮水供应

附录A　回流污染的危害程度及防回流设施选择

附录B　居住小区地下管线（构筑物）间最小净距

附录C　给水管段卫生器具给水当量同时出流概率计算式αc系数取值表

附录D　阀门和螺纹管件的摩阻损失的折算补偿长度

附录E　给水管段设计秒流量计算表

附录F　饮用水嘴同时使用数量计算

本规范用词说明

引用标准名录

1　General provisions

2　Terms and symbols

• 2.1　Terms

• 2.2　Symbols

3　Water supply

• 3.1　Rated water consumption and water pressure

• 3.2　Water quality and contamination prevention

• 3.3　System selection

• 3.4　Pipe materials，appurtenances and water meters

• 3.5　Piping layout and laying

• 3.6　Design flow and hydraulic calculation of pipe

• 3.7　Water towers，Water tanks，Reservoirs

• 3.8　Pressurizing equipments，pump stations

• 3.9　Swimming pools and aquatic recreation pools

• 3.10　Cooling water circulation and cooling towers

• 3.11　Waterscape

4　Drainage

• 4.1　Selection of drainage systems

• 4.2　Plumbing fixtures and traps

• 4.3　Piping layout and laying

• 4.4　Hydraulic calculation of drainage pipe

• 4.5　Pipe materials，appurtenances and manholes

• 4.6　Vent pipes

• 4.7　Sewage pumps and pump pits

• 4.8　Small domestic wastewater treatment

• 4.9　Rainwater

5　Hot water and drinking water supply

• 5.1　Rated consumption，temperature and quality of hot water

• 5.2　Selection of hot water supply systems

• 5.3　Calculation of heat consumption hot water consumption and power capability of heating equipment

• 5.4　Water heating and storage

• 5.5　Calculation of pipenet

• 5.6　Pipe materials，appurtenances and piping layout

• 5.7　Drinking water supply

Appendix A　Degree of backflow hazard ＆ the selection of backflow prevention facilities

Appendix B　Minimum clearance between underground pipelines（structure）for residential community

Appendix C　Probability formula calculating water supply fixture unit and peak flow，αc values table

Appendix D　Equivalent length for friction loss of valves and threaded fittings resistance

Appendix E　Calculation table for design flow of water supply piping in L/S

Appendix F　Calculation for the number of simultaneously use drinking water taps

Explanation of wording in this code

List of quoted standards