This category of articles only focus on welder qualification in accordance with ASME Section IX, for coded jobs.
In this article I have discussed how to write a WPQR – short for Welder Performance Qualification Record. This discussion is in reference to Section IX of ASME BPVC. A WPQR is a record of actual events that occurred during a welder’s performance qualification in accordance with ASME Section IX. Below is the suggested format … Read more
ASME Section IX considers that depositing corrosion resistant overlay requires a different skill than the skill required to weld on groove welds, fillet welds, build ups, etc. Thus, in QW 381, Section IX provides for the stipulations governing the welding performance qualifications for corrosion-resistant weld metal overlays. In this article, we shall discuss various aspects … Read more
When a welder is qualified in accordance with ASME BPVC Section IX, he is only eligible to weld within the qualified ranges of the variables followed in his qualification test coupon. The qualified ranges of only a few variables (that are laid out under QW-350 in Article III of Section IX) need to be reckoned. … Read more
In this article, we shall explore the matter of preheat and PWHT for welder qualification as per ASME Section IX. Is it necessary to do preheat and/or PWHT? Can a WPS qualified with preheat be used for preparing a welder qualification coupon without preheat? Likewise, can a WPS qualified with PWHT be used for preparing … Read more
This article addresses a couple of questions surrounding the subject of weld reinforcement in welder qualification. I have tried to explore the intent of Section IX on this. Should the weld reinforcement be removed once welding of the welding performance qualification coupon is over? Must it be removed? Is it permitted to remove it? Read … Read more
When the production welding involves a lot of welding of pipes, it is best to qualify your welder on a pipe test coupon. Although, welder qualification for pipe welding need not be necessarily be done on a pipe; a welder qualified on a plate is qualified to weld on pipes too, with some restrictions, as … Read more
In this article we shall discuss about the subject of base metal for welder qualification. What grade of base metal, what thickness of base metal should be used for qualifying a welder in accordance with Section IX. What grades and thicknesses of base metals would he be qualified for in production welding – will also … Read more
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