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API 521

M00042261

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API 521 Guide for Pressure-Relieving and Depressuring Systems

standard by American Petroleum Institute, 03/15/1997

Full Description

A guide for plant engineers in the design, installation, and operation of pressure-relieving and depressuring systems. Supplements API Recommended Practice 520, Part I. Guidelines are provided for examining principal causes of overpressure; determining individual relieving rates; and selecting and designing disposal systems, including such component parts as vessels, flares, and vent stacks. Suggested solutions to the immediate design and economic and safety problems involved in pressure-relieving discharge systems are presented. Includes a new section on flare gas recovery.

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Date of Issue: February 15, 1999

Affected Publication: API Recommended Practice 521, Guide for Pressure-Relieving and Depressuring Systems, Fourth Edition, March 1997


ERRATA


This errata corrects an editorial error in the Fourth Edition of RP 521.


Page 64, Equation 30, shown below is incorrect:


= ----------------------------------

Uc 1.15

v C 

The correct version of Equation 30 is as follows:

=

Uc 1.15