Weld metallurgical qualification Standards and other welding Standards

There are two main sets of "qualifications" in guaranteeing weld quality:

• Weld metallurgical qualification Standards, which show that the metallurgy of the weld will give the properties required; of strength, toughness, etc.
• the welder (the-person) qualification ("Coding") which shows that the welders employed on the project are able to produce sound welds without flaws large enough to be classified as defects, which possess the properties desired and proven in the Weld metallurgical qualification Standard tests

The Standards governing the Weld metallurgical qualification are a completely different set / family (in ISO's, from ISO15607 through to ISO15614-series) from the Standards governing welder-the-person Qualification (ISO9606)

This article is about solely the Weld metallurgical qualification and its Standards (ISO15607 up to and including the ISO15614 series).

(R. Smith, 06Oct2015)