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Developing Welding Procedure Specification

29 May 2020

Different industries usually utilise welding in joining and fusing materials. And for these industries to perform welding effectively, they must follow a set of procedures that are intended to give the best welding results possible. This set of procedures is typically indicated in a document called Welding Procedure Specification (WPS).

WPS is a written document that describes welding procedures and provides directions to the welder or welding operators. The presence of this document helps welders know the accepted procedures for the welding process. It also enables them to stick with repeatable and verified welding techniques that are deemed effective and efficient.

If you are dealing with demand critical welds or with hard-to-weld metals, then having a fully developed WPS can make things simple. To develop your own WPS, you may want to follow the following approaches.

Use a Previous Welding Procedure

If you have successfully welded metal materials before, then you may want to use that specific welding procedure again. When you encounter the same metal material that you have welded before, what you can do is to copy and use the same welding procedure you have used before. You can also perform additional verification tests like the macro-etch test and bend test to determine if there are some elements that you should modify on your existing welding procedure.

Follow Recommendation from the Manufacturer

Filler metals are typically used for securing joint between two adjacent surfaces. Usually, manufacturers of filler metals publish typical operating procedures for their products. Following these procedures can be a good start, especially if you do not have a lot of experience in developing welding procedures or lack some knowledge on the specifics of welding. But remember, you can still modify or simplify the recommendation of the manufacturer for safer and more productive welding.

Develop Procedures from Scratch

Developing a new WPS usually happens when the materials or the variables involved are not common and typical. This type of approach also happens whenever you are limited by your equipment. And given the complexity of this approach, you are required to perform a lot of tests and evaluations for you to gain the most optimal welding performance and results. Tests like macro-etch tests and bend tests can also be applied when performing procedure applications.

Use a Standard Welding Procedures Specification

There is a difference between standard WPS and prequalified welding procedures. A prequalified welding procedure specification can only be used by certain welding codes and is not widely published. Therefore, you still need to develop the procedures on your own. Standard WPS, on the other hand, can be used right away without determining all the needed procedures and variables for your welding. Standard WPS is best for fabricators that lack proficiency in welding.

Hire a Professional Welding Consultant

If you have the resources to hire a professional welding consultant, then hire one. However, you must be very careful since some welding consultants tend to recommend welding procedures that are not appropriate for your welding materials and other elements. Work with a consultant that has amazing background and experience in welding so that he or she can come up with great welding procedures. He or she must also help you in qualifying your welders for excellent welding results.

Whatever approach you intend to choose, you can expect great welding results if you appropriately evaluate every element and conduct every test possible. If you need help with the development of your WPS, feel free to contact us at Warco Engineering. We have accredited welding inspectors and supervisors that have extensive knowledge and experience to follow specific welding techniques that guarantee high-quality weld results.

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