21 Changes to PQR Essential Variables that Require WPS Requalification

​Have you ever seen a welding procedure specification with established amperage ranging from 200 to 550 amps?Or voltage ranging from 21 to 29 volts?Or some other variable with a huge window?This is all too common, but extremely dangerous. Why? Because changes to essential variables beyond that which is reasonable will affect the physical and mechanical […]

The Importance of Accurate Documents to Support Welder Qualifications

When it comes to precision welding and fabrication, it only takes one wrong document to cause a major problem.  Still, many companies operate by the motto: “if it ain’t broke, don’t fix it”.  Assuming you have incredible attention to detail and a lot of luck, that approach might work for a while.  That’s why companies […]

How to Keep Welder Qualifications Active

There is a misconception that welder qualifications are only good for six months.   This is not accurate.  Most codes state that welder qualifications may lapse if the welder is not engaged in a given process for which he or she is qualified for a period exceeding six months. This means that as long as the […]

How to Qualify Welders for Internal Purposes

Whenever we think about qualifying welders we typically think about welding codes such as one of the AWS structural welding codes, API 1104 or ASME Section IX.  In most cases qualifications are carried out to comply with a customer requirement. But what if you simply want to qualify your welders as part of your own […]

Who Can Qualify My Welders?

There is a misconception in our industry that the qualification of welders, and welding procedures for that matter, needs to be done by a certified welding inspector (CWI) or a welding engineer.  Or that it has to be done by a third party.  Although this may be the case if specified in contract documents, more […]

Common Tests for Welder Performance Qualification

The purpose of welder performance qualifications is to ensure that the welder can deposit sound welds.  There are several tests, both destructive and nondestructive, that are used to evaluate a welder’s ability to deposit good welds.  Below are four of the most common test applied for these qualifications:   Visual Inspection (VT) Visual inspection is […]

Pick Your Prequalified Welding Procedures Carefully

If you work with AWS D1.1 you are probably familiar with the use of prequalified welding procedures.  The use of prequalified WPSs provides many benefits to the fabricator, one of which is costs savings due being exempt from having to perform costly testing to qualify the welding procedure.  However, if you are looking to save […]

Fillet Weld Leg Sizes Are Meaningless!

Measuring fillet weld legs is meaningless, well… not really.  Fillet weld leg sizes are very important, but simply measuring the leg of a fillet weld does not tell us if we actually achieved the desired throat dimension.  The strength of a fillet weld is determined by its effective throat.  As you can see in the […]

3 Methods To Keep Track of WPSs, PQRs & WPQRs

Not having a good system to keep track of qualification documents can cost you a lot of money

Keeping track of welding procedure specifications (WPSs), procedure qualification records (PQRs) and performance qualification records (WPQRs) can become a tedious task.  A simple WPS and PQR may not seem like much, but a medium to large contract may require you to qualify 5-10 welding procedures procedures along with 15-20 welders. If this is the case […]

11 Reasons Why Welders Don’t Follow Welding Procedures

The purpose of having welding procedures specifications (WPS) is to ensure quality. This is accomplished by giving the welder a detailed set of instruction on how to deposit weld metal for a specific joint.  Consistent quality can be achieved, but there is one caveat.  The welding procedures must be well written.  A poorly written welding […]