Welding Codes And Standards

In this article I will discuss the subject of qualified weld thickness for welder qualification. This includes the maximum qualified weld thickness and minimum qualified weld thickness. A small section at the end also addresses the qualified base metal thickness for welder qualification, and qualified weld thickness for welding operators as well. Thickness Of Weld … Read more

Welding without backing takes greater skill on the part of welder. Which is why, Section IX has listed deletion of backing as an essential variable for welder qualification. This article will let you know about the various aspects of with and without backing for welder qualification. The latter half of the article gives some attention … Read more

ASME Section IX permits covering multiple welder qualification through single test coupon. In this article, I will discuss various things that must be kept in mind when opting for qualifying multiple welding performance qualifications in a single coupon. A welder must qualify for each of the processes that he intends to use in production welding. … Read more

Generally, the validity of a welder’s qualification is six months, as per ASME Section IX. The welder’s qualification is said to have expired if he has not welded with that process for a period of six months. However, provision has been given in Section IX for renewal of expired welder qualification too. Renewing the validity … Read more

In this article, we shall see about the various aspects related to the matter of validity of welder qualification as defined in ASME Section IX. Validity Of Welder Qualification As Per ASME Section IX? Generally, a qualification is valid for six months. However, the criterion for extending this validity as per Section IX is very … Read more

ASME Section IX provides for immediate retests in welding performance qualification (for both welders and welding operators) if one or more tests do not meet the specified acceptance criteria. The provisions for immediate retesting using mechanical testing, volumetric NDE, and visual examination have been clearly defined in QW 321. This article does not seek to … Read more

This article discusses some of the welder performance qualification FAQs that arise in a welding engineer’s mind in the process of welders’ qualifications in accordance with ASME Section IX. Does A Person Helping The Main Welder Need To Be Qualified As Per Section IX? In my shop, for important joints – often more than one … Read more

In this article, I have discussed some fundamental aspects of a Welder Performance Qualification in accordance with ASME Section IX. The article begins with some of the very basic questions such as what it means to qualify a welder, why should a welder be qualified at all, how to document a welder’s qualification etc. The … Read more