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Since 1924, the American Petroleum Institute has been a cornerstone in establishing and maintaining standards for the worldwide oil and natural gas industry. Our work helps the industry invent and manufacture superior products consistently, provide critical services, ensure fairness in the marketplace for businesses and consumers alike, and promotes the acceptance of products and practices globally.

Standards enhance the safety of industry operations, assure quality, help keep costs down, reduce waste, and minimize confusion. They help speed acceptance, bring products to market quicker, and avoid having to reinvent the wheel every time a product is manufactured.

To see our recently published documents, addenda and erratas please click here. 

Important Stds. Announcements

Important Standards Announcements.

Purchase API Standards & Software

Visit the API Publications Store to purchase copies of our standards. Our standards are designed to assist industry professionals improve the efficiency and cost-effectiveness of their operations, comply with legislative and regulatory requirements, safeguard health, and protect the environment.

API Compass Subscriptions

API now offers a direct subscription service to the standards your organization needs via API Compass.

Access standards, mitigate risk with the latest change management tools (including new standard alerts), analyze available standards and make gap analysis notes to reduce reliance on internal standards (increasing efficiencies), and support other API initiatives through this direct licensing platform.

Subscribers can sign up by industry area or for the complete API collection. The most used standards are also available in two convenient formats (PDF and HTML/online).

You can also call toll-free 1-800-730-0250 or email us at

Standards Inquiries

API receives numerous inquiries related to its standards, specifications, recommended practices, technical reports and codes (i.e. documents).

Standards Committees

API’s Standards Committees are made up of subcommittees and task groups comprised of industry experts who develop API standards. See a list of all open ballots.

Downstream Committees

Midstream Committees

Upstream Committees

Program Information

Information on the API Standards Program

Standards Plan

Each year, API updates current standards, creates new standards and adopts existing standards.

Addenda & Errata

Addenda (amendments) and errata for published API standards are available via the API Publications Store.

Educational Outreach

API Global Webcasts and Engineering Partnership Program

Policies & Procedures

API Standards Policy and Procedure Documents


Rights and Usage Policy

The Intellectual Property (IP) Rights and Usage Policy provides information on API's copyrights and trademarks, and outlines the process of requesting to reproduce API-copyrighted material.