GB 50974-2014 第5.1.13条
| **** | Fire pump discharge pipe and pressure gauge: The discharge pipe of a fire pump shall be provided with a check valve and an OS&Y gate valve; when butterfly valves are used, they shall be equipped with a locking device. A pressure gauge shall be installed on the discharge pipe, with a range not less than twice the rated working pressure of the pump and not less than 1.6 MPa. |