Buy API STD 650:2025

Welded Tanks for Oil Storage

Available format(s)

PDF

Language(s)

English

Published date

07-08-2025

Publisher

American Petroleum Institute

€736.93

Excluding VAT

This standard establishes minimum requirements for material, design, fabrication, erection, and inspection for vertical, cylindrical, aboveground, closed- and open-top, welded storage tanks in various sizes and capacities for internal pressures approximating atmospheric pressure (internal pressures not exceeding the weight of the roof plates), but a higher internal pressure is permitted when additional requirements are met (see 1.1.13).

DocumentType	Standard
Pages	542
PublisherName	American Petroleum Institute
Status	Current
Supersedes	API STD 650:2020 INC ERR 1:2021 API STD 650:2020/ERRATA 1:2021

API RP 577:2020+ERR 1:2025	Welding Processes, Inspection, and Metallurgy
API RP 2350 : 2020 INC ERR 1:2021(R2025)	Overfill Prevention for Storage Tanks in Petroleum Facilities

Frequently Asked Questions

API 650 is used by tank designers, manufacturers, inspectors and operators in petroleum and process industries. It is a United States standard published by American Petroleum Institute (API).

API 650 sets requirements for material, design, fabrication, erection and testing of above-ground welded storage tanks. It is a United States standard published by American Petroleum Institute (API).

API 650 sets requirements for material, design, fabrication, erection and testing of above-ground welded storage tanks. In practice it is applied by tank designers, manufacturers, inspectors and operators in petroleum and process industries.

No — API 650 is a United States standard published by American Petroleum Institute (API), with its listed region as United States.

API 650 is American Petroleum Institute (API)'s standard for welded tanks for oil storage, while ASME B31.3 covers process piping (United States). API 650 sets requirements for material, design, fabrication, erection and testing of above-ground welded storage tanks. ASME B31.3 sets requirements for materials, design, fabrication, examination and testing of process piping.

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API STD 650:2025

Welded Tanks for Oil Storage

Abstract

General Product Information

Standards Referenced By This Book

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Who needs to comply with API 650?

What is API 650?

What is API 650 used for?

Is API 650 an Australian standard?

What is the difference between API 650 and ASME B31.3?