Which pipelines should be installed with safety valves
In order to ensure the safety of pressure pipelines, the following pressure pipelines should be equipped with safety valves:
(1) A safety valve should be installed on the outlet pipe of a positive displacement pump such as an electric reciprocating pump, gear pump or screw pump. The vent pipe of the safety valve should be connected to the pump inlet pipeline, and an accident parking interlock device should be installed (except for the equipment itself with a safety valve);
(2) A safety valve should be installed at the outlet of each section of the combustible gas reciprocating compressor, and the vent pipe of the safety valve should be connected to the inlet pipe of each section of the compressor or the population pipe of the compressor section;
(3) Pipelines where the combustible gas and combustible liquid may expand beyond the design pressure when heated should be equipped with safety valves;
(4) Safety valves or other safety measures should be installed on the liquefied hydrocarbon pipelines that may be closed at both ends and cause pressure increase;
(5) When the equipment connected to the outlet of the blower, centrifugal compressor, centrifugal pump or steam reciprocating pump cannot withstand its maximum pressure, the outlet pipe of the above-mentioned pump shall be provided with a safety valve. The above pipelines may cause explosion accidents due to fire, operation failures or water cuts, power outages, etc., causing the pressure in the pipelines to exceed the design pressure, so safety valves or other safety measures should be installed.