API RP 521 ERTA Guide for Pressure-Relieving and Depressuring Systems

	Purchase Information Use this form to request purchase information on API online subscriptions. API Collections First Name: Last Name: Email address:

Document API RP 521 ERTA is offered by IHS as part of an online subscription. This subscription contains many documents on the same topic.

You may also purchase this document alone from the IHS Standards Store.

API RP 521 ERTA Document Information:

Title
Guide for Pressure-Relieving and Depressuring Systems

American Petroleum Institute

Publication Date:
Feb 15, 1999

Scope:

1.1 Scope

This recommended practice is applicable to pressure-relieving and vapor depressuring systems. 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 recommended practice is intended to supplement the practices set forth in API Recommended Practice 520, Part 1, for establishing a basis of design.

This recommended practice provides guidelines for examining the principal causes of overpressure; determining individual relieving rates; and selecting and designing disposal systems, including such component parts as vessels, flares, and vent stacks.

Piping information pertinent to pressure-relieving systems is presented in 5.4.1, but the actual piping should be designed in accordance with ASME B31.3 or other applicable codes.

Health risks may be associated with the operation of pressure-relieving equipment. The discussion of specific risks is outside the scope of this document.

About IHS
IHS (NYSE: IHS) is a leading global provider of critical technical information, decision-support tools and related services in a number of industries including aerospace and defense, automotive, construction, electronics, and energy. IHS serves customers ranging from large governments and multinational corporations to smaller companies and technical professionals in more than 100 countries. IHS been in business for more than 45 years and employ more than 2,300 people around the world.