API Std 527 (R2025) ✓ Most Recent

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Seat Tightness of Pressure Relief Valves, Fifth Edition

standard by American Petroleum Institute , 07/01/2020

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Full Description

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

The maximum acceptable leakage rates are defi ned for pressure relief valves with set pressures from 103 kPa gauge (15 psig) to 41,379 kPa gauge (6000 psig). If greater seat tightness is required, the purchaser shall specify it in the purchase order.

The test medium for determining the seat tightness—air, steam, or water—shall be the same as that used for determining the set pressure of the valve. For dual-service valves, the test medium—air, steam, or water—shall be the same as the primary relieving medium.

To ensure safety, the procedures outlined in this standard shall be performed by persons experienced in the use and functions of pressure relief valves. See more

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Document History

  1. API Std 527 (R2025)

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    viewing


    Seat Tightness of Pressure Relief Valves, Fifth Edition

    • Most Recent

  2. API Std 527


    Seat Tightness of Pressure Relief Valves, Fourth Edition

    • Historical Version

  3. API Std 527 (R2007)


    Seat Tightness of Pressure Relief Valves

    • Historical Version

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Product Details

Edition:

5th

Published:

07/01/2020

Number of Pages:

13

File Size:

1 file , 819 Bytes

Redline File Size:

2 files , 819 Bytes

Product Code(s):

C52705, C52705, C52705, C52705

Note:

This product is restricted and cannot be purchased in the following countries Ukraine, Russia, Cuba, Syria, Belarus, Iran, North Korea