Safety valve calibration
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May I ask whether safety valves for non-pressure vessels and pressure pipelines need to be calibrated? If so, please provide the relevant basis
Since there is no pressure at all, why install a safety valve?
If it is a safety valve on a pressure vessel, it must be calibrated once a year. Other normal, non-pressure components such as the safety valves on foam station connectors are not used frequently, and there are no explicit requirements for calibrating them; however, from a safety perspective, it is still necessary to calibrate them!
The safety inspection requires an annual check, and it is also necessary to purchase their safety valves
It seems that there is no mandatory requirement for calibrating safety valves on non-pressure vessels and pipelines, but calibration is still necessary for safety reasons
For non-pressure vessels and pipes, it refers to the safety valves on equipment. Devices such as air compressors and reciprocating pumps obviously need to be calibrated annually.
I’ll explain in more detail on the 3rd floor: why do pressure valves still be necessary for non-pressure vessels and pipes?
Reply to 7# tjsnow: Please pay attention to the definitions of pressure vessels and pressure pipelines. A vessel is not necessarily one that is under pressure; a pipeline is also considered a pressure vessel. Even if there is high pressure in such a pipeline, like in a cooling water pipeline, it is not considered a pressure pipeline. Pressure vessels: 1. The maximum operating pressure is greater than or equal to 0.1 MPa (gauge pressure); 2. The product of volume and pressure is greater than or equal to 2.5 MPa·L; 3. The medium transported is gas, steam, liquefied gas, or a liquid whose maximum operating temperature is greater than or equal to its standard boiling point. Pressure pipelines: 1. The maximum operating pressure is greater than or equal to 0.1 MPa (gauge pressure); 2. The nominal diameter is greater than 25 mm; 3. The medium transported is gas, steam, liquefied gas, a liquid whose maximum operating temperature is greater than or equal to its standard boiling point, or a liquid that is flammable, explosive, toxic, or corrosive