The American Welding Society (AWS) publishes over 240 AWS-developed codes, recommended practices and guides which are written in accordance with American National Standards Institute (ANSI) practices. The following is a partial list of the more common publications:
Standard symbols for welding, brazing, and non-destructive examination
Standard welding terms and definitions
Specification for carbon steel electrodes for shielded metal arc welding
Specification for carbon steel electrodes and rods for gas shielded arc welding
Guide for the nondestructive examination of welds
Specification for Welding Procedure and Performance Qualification
American Petroleum Institute (API) Standards
The American Petroleum Institute (API) oldest and most successful programs is in the development of API standards which started with its first standard in 1924. API maintains over 500 standards covering the oil and gas field. The following is a partial list specific to welding:
API RP 577
Welding Inspection and Metallurgy
API RP 582
Welding Guidelines for the Chemical, Oil, and Gas Industries
The European Committee for Standardization (CEN) had issued numerous standards covering welding processes, which unified and replaced former national standards. Of the former national standards, those issued by BSI and DIN were widely used outside their countries of origin. After the Vienna Agreement with ISO, CEN has replaced most of them with equivalent ISO standards (EN ISO series).
Qualification test of welders — Fusion welding — Part 1: Steels. Withdrawn and replaced by EN ISO 9606-1 
Execution of steel structures and aluminium structures - Part 1: Requirements for conformity assessment of structural components
Execution of steel structures and aluminium structures - Part 2: Technical requirements for steel structures
Execution of steel structures and aluminium structures - Part 3: Technical requirements for aluminium structures
Welding — Recommendations for welding of metallic materials — Part 1: General guidance for arc welding
Welding — Recommendations for welding of metallic materials — Part 2: Arc welding of ferritic steels
Welding — Recommendations for welding of metallic materials — Part 3: Arc welding of stainless steels
Welding — Recommendations for welding of metallic materials — Part 4: Arc welding of aluminium and aluminium alloys
Welding. Recommendations for welding of metallic materials. Welding of clad steel
Welding. Recommendations for welding of metallic materials. Laser beam welding
Welding — Recommendations for welding of metallic materials — Part 7: Electron beam welding
Welding. Recommendations for welding of metallic materials. Welding of cast irons
Welding personnel. Approval testing of welding operators for fusion welding and resistance weld setters for fully mechanized and automatic welding of metallic materials. (CEN version of ISO 14732)
Welding. Basic welded joint details in steel. Pressurized components.
Welding. Basic weld joint details in steel. Non-internal pressurized components.
Welding. Basic weld joint details in steel. Clad, buttered and lined pressurized components.
Eurocode 3: Design of steel structures – Part 1-8: General – Design of joints
Brazing - Brazer approval
Welded, brazed and soldered joints – Symbolic representation on drawings. (CEN version of ISO 2553)
Additional requirements for welding exist in CEN codes and standards for specific products, like EN 12952, EN 12953, EN 13445, EN 13480, etc.
^"ISO Standards". International Organization for Standardization. Retrieved 7 November 2011.
^"About us". European Committee for Standardization (CEN). Retrieved 7 November 2011.
^The 2004 version of this CEN standard was introduced in place of ISO 9606-1, which was not accepted by the ISO committee due to reactions by USA and Canada. See Davis, A.: "Welder Qualification Standards - Philosophy and Feedback", AWS Welding Journal, July 2003, pp. 14–16. EN ISO 9606-1 was finally published in November 2013 and is gradually introduced in Europe, the deadline for complete replacement being October 2015.