Welding Procedure Qualification As Per ASME Section IX

In this article, I have discussed various aspects related to welding procedure qualification in accordance with ASME BPVC Section IX. These observations are borne out of almost a decade long personal experiences on this subject. What is a Welding Procedure Specification? Simply put, a WPS, short for Welding Procedure Specification, is a document (generally not … Read more

How to Address Groove Design and Root Spacing on a WPS

This article discusses about the subject of root spacing and groove design. How to address these variables on a WPS made in accordance with ASME Section IX? Let’s begin right away. Groove Design Groove design is a non-essential variable for most processes, except EBW. So a change from one groove type to another does not … Read more

Dissimilar Base Metal Thicknesses

This article discusses in some detail the subject of dissimilar base metal thicknesses for welding procedure qualification in the context of ASME Section IX. A couple of ASME Interpretations have been made use of to explain some points. What Constitutes Dissimilar Base Metal Thickness? QW 451 sets the limits for qualified base metal thicknesses for … Read more

Commonly Asked Questions On WPS With Toughness Requirement

This article covers only a couple of the questions that get commonly asked pertaining to qualification of WPS with toughness testing. Surely many more interesting issues can be explored around the subject. Do feel free to add your own insights in the comments section below. Using a PQR Qualified With Toughness For Joints Not Requiring … Read more

Supplementary Essential Variables As Per ASME Section IX

This article addresses the subject of supplementary essential variables on a WPS, in accordance with ASME Section IX. Various supplementary essential variables, that appear under most processes under QW 250, have been discussed in some detail. At the end, a small portion is included to explain how to carry out requalification of a PQR when … Read more

Filler Metal On A WPS

This article some of the issues related to the subject of filler metal on a WPS. The entire discussion is done in the context of ASME Section IX, and might not be relevant to other codes. The article focuses special attention on use of unassigned filler metals on a WPS, and also rules regarding filler … Read more

A-Number On A WPS

This article discusses about the subject of A-Number on a WPS. The article begins with an introduction of A-number, then explains how to apply it vis-à-vis the rules of ASME Section IX. It goes on to explain various methods of determining A-number. Towards the end of the article, it explores a little the question of … Read more

WPS Qualification For Pressure Retaining Fillet Welds

This article lets you know about WPS qualification for fillet welds – pressure retaining as well as non-pressure retaining ones. At the end, a couple of paragraphs also address the subject of performance qualification for pressure retaining fillet welds. Procedure Qualification For Fillet Welds We know that, ordinarily, the WPS qualification for a fillet joint … Read more