Transcription of API Standard 520 - Sizing, Selection, & Installation …
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API Standard 520 - Sizing, Selection, & Installation …
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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