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Codes and Standards

The following is a list of some of the American Petroleum Institute codes for the storage tank industry.

API Standards for Above Ground Storage Tanks

API-650
Welded Steel Tanks for Oil Storage. This document governs the construction of tanks storing products with internal pressures up to 2.5 psig.

API-651
Lining of Above Ground Petroleum Storage Tanks

API-653
Tank Inspection, Repair, Alteration, and Reconstruction

API-620
Design and Construction of Large Welded Low Pressure Storage Tanks. This covers the construction of tanks with internal pressures up to 15 psig

API-2000
Venting Atmospheric and Low-Pressure Storage Tanks

API-2517
Evaporating Losses from External Floating Roof Tanks

API-2519
Evaporating Losses from Internal Floating Roof Tanks

API-2350
Overfill Protection for Petroleum Storage Tanks

API-2015
Cleaning Petroleum Storage Tanks

API-2550
Measurements and Calibration of Petroleum Storage Tanks