API-

620

Design and

Construction of Large,

Welded, Low Pressure

Storage Tanks

Guide for construction of tanks with internal pressures up to

15 psig. For large tanks which are assembled in field and are

used for storage of petroleum intermediates and petroleum

products.

API

650

Welded Steel Tanks for

Oil Storage

This document governs the construction of tanks storing

hydrocarbon products at low operating pressure (up to 2.5

psig).

API-

651

Cathodic Protection for

Above Ground

Petroleum Storage

Tanks

Discussion on corrosion problems in above ground petroleum

storage tanks and associated piping. Plus description of two

commonly used methods of providing cathodic protection

against corrosion.

API-

652

Lining of Above Ground

Petroleum Storage

Tanks

Guide effectively limiting corrosion by lining the tank bottom,

for hydrocarbon storage tank made of steel. Guidelines are

given regarding lining materials, their applications, inspection

of tank bottom lining etc.

API-

653

Tank Inspection,

Repair, Alteration, and

Reconstruction

Guideline for inspection, repair, alteration, and reconstruction

of above ground hydrocarbon and chemical storage tanks,

made of steel. Minimum requirements for maintaining the

integrity of welded or riveted, non-refrigerated, atmospheric,

above ground storage tanks, are discussed.

API-

2000

Venting Atmospheric

and Low-Pressure

Storage Tanks

Guide for normal and emergency vapor venting requirements

for above ground petroleum and petroleum product storage

tanks, above ground and underground refrigerated storage

tanks. The tanks discussed in the document are designed for

low pressures ranging from full vacuum through 15 psig.

API-

2015

Cleaning Petroleum

Storage Tanks

Guide for preparing, emptying, isolating,ventilating,

atmospheric testing, cleaning, entering into, hotwork and

recommissioning activities in, on and around atmospheric and

low-pressure (up to 15 psig) above ground storage tanks

containing flammable, combustible or toxic materials.

API-

2517

Evaporating Losses

from External Floating

Roof Tanks

Guide for estimating the total evaporation losses or

atmospheric hydrocarbon emissions from external floating

roof tanks containing multicomponent hydrocarbon mixtures

or single component storage stocks.

API-

2519

Evaporating Losses

from Internal Floating

Roof Tanks

Summary of performances of internal floating covers to

prevent evaporation losses. Effects of internal floating covers

on tank operation as well as the provisions for gaging,

sampling, and temperature reading are described in the

document.

API-

2350

Overfill Protection for

Petroleum Storage

Tankss

Covers overfill protection for all aboveground storage tanks in

petroleum facilities, including refineries, terminals, bulk plants

and pipeline terminals that receive Class I (flammable) or

Class II (combustible) liquids.

API-

2550

Measurements and

Calibration of

Petroleum Storage

Tanks

Procedures for calibrating upright cylindrical tanks which are

larger than a drum or a barrel. Procedures for making

measurements are discussed in Part I of the document and

methods of calculating the tank volume are given in Part II.