API STD 527:2020(R2025) Standard | PDF Download

Seat Tightness of Pressure Relief Valves

Available format(s)

PDF

Language(s)

English

Published date

07-31-2020

Publisher

American Petroleum Institute

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US$143.00

Excluding Tax where applicable

Summarise this standard

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This standard describes methods of determining the seat tightness of metal- and soft-seated pressure relief valves, including those of conventional, bellows, and pilot-operated designs.

DocumentType	Standard
Pages	13
ProductNote	Reaffirmed on Aug 2025
PublisherName	American Petroleum Institute
Status	Current
Supersedes	API STD 527 : 2020

Frequently Asked Questions

API 527 belongs to the topic area of pressure relief systems. It is a United States standard published by American Petroleum Institute (API).

No — API 527 is a United States standard published by American Petroleum Institute (API), with its listed region as United States.

API 527 is published by American Petroleum Institute (API). It is a United States standard.

API 527 is American Petroleum Institute (API)'s standard for pressure relief systems, while API 521 REDLINE covers pressure-relieving and depressuring systems (United States). API 527 provides requirements, guidance or test methods for pressure-relief, depressuring, vent and flare systems. API 521 REDLINE covers sizing, selection, installation, inspection or system design for pressure-relief and depressuring equipment.

API 527 provides requirements, guidance or test methods for pressure-relief, depressuring, vent and flare systems. It is a United States standard published by American Petroleum Institute (API).

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API STD 527:2020(R2025)

Seat Tightness of Pressure Relief Valves

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