Quality requirements are now grouped by specific activity rather than Product Specification Level (PSL), making it easier for manufacturers to locate all relevant standards in one place.
If you are outside the US, your local standards body sells identical copies. Api Specification 6a 21st Edition Pdf LINK
Disclaimer: This article is for informational purposes. Prices and links are subject to change. Always verify you are purchasing the latest edition including errata from authorized resellers. Quality requirements are now grouped by specific activity
API Specification 6A, 21st Edition - American Petroleum Institute 21st Edition - American Petroleum Institute
Quality requirements are now grouped by specific activity rather than Product Specification Level (PSL), making it easier for manufacturers to locate all relevant standards in one place.
If you are outside the US, your local standards body sells identical copies.
Disclaimer: This article is for informational purposes. Prices and links are subject to change. Always verify you are purchasing the latest edition including errata from authorized resellers.
API Specification 6A, 21st Edition - American Petroleum Institute