API SPEC 6D:2021+ADD 3:2025 Standard | PDF Download

Specification for Valves

Available format(s)

PDF

Language(s)

English

Published date

03-01-2025

Publisher

American Petroleum Institute

Superseded date

10-21-2026

Superseded by

API SPEC 6D:2021+ERR 4:2026

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US$227.00

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Summarise this standard

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This specification defines the requirements for the design, manufacturing, materials, welding, quality control, assembly, testing, marking, documentation, and process controls of axial, ball, check, gate, and plug valves for application in the petroleum and natural gas industries, and hydrogen gas service.

DocumentType	Standard
Pages	184
PublisherName	American Petroleum Institute
Status	Superseded
SupersededBy	API SPEC 6D:2021+ERR 4:2026
Supersedes	API SPEC 6D:2021+ADD 2:2024

Frequently Asked Questions

No — API 6D is a United States standard published by American Petroleum Institute (API), with its listed region as United States.

API 6D is American Petroleum Institute (API)'s standard for oil and gas equipment and tubular products, while API SPEC 6A:2018+ADD 4:2024 covers valves and wellhead equipment (United States). API 6D specifies technical, material and performance requirements for the oil and gas equipment or tubular product identified by the document. API SPEC 6A:2018+ADD 4:2024 specifies design, manufacture or testing requirements for valves, flanges or wellhead equipment.

API 6D specifies technical, material and performance requirements for the oil and gas equipment or tubular product identified by the document. In practice it is applied by petroleum operators, engineering contractors, manufacturers and inspectors procuring critical oilfield equipment.

API 6D is used by petroleum operators, engineering contractors, manufacturers and inspectors procuring critical oilfield equipment. It is a United States standard published by American Petroleum Institute (API).

API 6D specifies technical, material and performance requirements for the oil and gas equipment or tubular product identified by the document. It is a United States standard published by American Petroleum Institute (API).

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API SPEC 6D:2021+ADD 3:2025

Specification for Valves

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Is API 6D an Australian standard?

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