GB 50015-2019 第3.5.3条
| **** | Hot water pipes (hotel central hot water supply system) shall be made of high-temperature-resistant and corrosion-resistant materials, such as thin-wall stainless steel pipes, copper pipes, and plastic hot water pipes (PP-R, PB, etc.). The nominal pressure of hot water pipes shall not be less than 1.0 MPa, and the pipes shall meet the long-term service requirements at the maximum working temperature of the system. |