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API STD 521

Pressure-relieving and Depressuring Systems

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Organization: API
Publication Date: 1 June 2020
Status: active
Page Count: 247
scope:

This standard is applicable to pressure-relieving and vapor depressuring systems. Although intended for use primarily in oil refineries, it is also applicable to petrochemical facilities, gas plants, liquefied natural gas (LNG) facilities, and oil and gas production facilities. The information provided is designed to aid in the selection of the system that is most appropriate for the risks and circumstances involved in various installations.

This standard specifies requirements and gives guidelines for the following:

- examining the principal causes of overpressure;

- determining individual relieving rates;

- selecting and designing disposal systems, including such component parts as piping, vessels, flares, and vent stacks.

This standard does not apply to direct-fired steam boilers.

Document History

API STD 521
June 1, 2020
Pressure-relieving and Depressuring Systems
This standard is applicable to pressure-relieving and vapor depressuring systems. Although intended for use primarily in oil refineries, it is also applicable to petrochemical facilities, gas plants,...
January 1, 2014
Pressure-relieving and Depressuring Systems
This standard is applicable to pressure-relieving and vapor depressuring systems. Although intended for use primarily in oil refineries, it is also applicable to petrochemical facilities, gas plants,...
June 21, 2007
Pressure-relieving and Depressuring Systems
This International Standard is applicable to pressure-relieving and vapour-depressuring systems. Although intended for use primarily in oil refineries, it is also applicable to petrochemical...
January 1, 2007
Pressure-relieving and Depressuring Systems
This International Standard is applicable to pressure-relieving and vapour-depressuring systems. Although intended for use primarily in oil refineries, it is also applicable to petrochemical...
January 1, 2007
Pressure-relieving and Depressuring Systems
This International Standard is applicable to pressure-relieving and vapour-depressuring systems. Although intended for use primarily in oil refineries, it is also applicable to petrochemical...

References

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