Transcription of API Standard 520 - Sizing, Selection, & Installation …
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StandardSectionInquiry #QuestionReply520 Part I7th - Jan. 2000 1: Is this a correct interpretation of Section in that the backpressure was specified to not exceed the allowable overpressure?Question 2: If my interpretation of is correct, would relief valve manufacturers be required to test their relief valves at 21% overpressure with 21% backpressure in order to offer a certified and ASME coded/stamped relief valve? My concern here is to clarify under what circumstances this section may be invoked if there is a restricted opportunity to take advantage of its benefits due to lack of capability from relief valve manufacturerReply 1: Yes.
Standard Section Inquiry # Question Reply API Standard 520 - Sizing, Selection, & Installation of Pressure Relieving Devices Part I, Sizing & Selection
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Relief Valve Engineering, Relief, Relief valve, Selection and Sizing of Pressure Relief Valves, Vickers Overhaul Manual Relief Valves Balanced, Valve, SET POINT TESTING An investigation of safety, SET POINT TESTING An investigation of safety relief valve, DOUBLE PILOT OPERATED LOCK VALVES METRO, Engineering