Discussion on the testing ratio for valves after arrival
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In SH3518-2013: I would like to discuss a few issues with everyone: 1. For \"valves with a design pressure of 1 MPa or higher\", how should the design pressure be understood? (1) Valve design pressure (2) Pipeline design pressure (3) Valve nominal pressure. 2. Is there such a thing as a design pressure for valves? My understanding is that the manufacturer only needs to select the pressure rating based on the operating conditions, and under that pressure rating, the valve’s operating conditions must fall within the rated pressure-temperature range, right? Therefore, there is no such thing as a designed pressure for valves; is that correct?
It should be: Valves for pipeline systems with a design pressure of 1 MPa or greater. For standard valves, there is no such thing as a design pressure; PN is determined solely based on the highest operating pressure of the piping system and the temperature-pressure chart of the valve material ； For non-standard valves, a design pressure must be specified. For your reference