Weld Procedure Development

Weld Procedure Development

To qualify the procedure, TPS will work with a person within the company, or an agent of the company to weld a given material. Variables will be recorded such as travel speed, amperage, voltage, filler metal, base metal, gas, etc. In short, this piece proves that it “can be done.” The one person that welds it will then be certified to perform that weld (within the allowable limits of the AWS code). This coupon will be subjected to specific testing by TPS, based on the code. It often will include tensile pulls, bends, etc.  The code will say how many samples to test in each method also. TPS will then create a document, called the PQR (Procedure Qualification Report). It will typically contain all the variables you used when you welded that first coupon, along with the reports from the destructive (or nondestructive) testing.

The WPS (Weld Procedure Specification) is then done. It will typically have a range of amperage you must be within, travel speed, tungsten, etc.

Later, other welders must individually test to prove that “they” can do it. They may be given the WPS and let go, or they may just be verbally told what to do. The CWI (or other person authorized by code) will prepare the WPQ (Welder Performance Qualification). This is what your company will retain to show that you have that particular “certification.”

Summary:
1) The procedure must be qualified and documented (PQR)
2) The WPS is created, based off of the PQR.
3) Individual welders must then qualify and the WPQ is made.