Understanding the Meaning of Coded Welding

14 February 2019

Coded welding credentials are obtained by passing a series of tests. After all, just like any other profession, fabrication companies want to know whether a hiree is certified to do the job. Do they have the right qualifications? Pulling out a curriculum vitae or a list of credentials, the answer is there in black and white. Of course, for every welding technique, there’s at least one welding test.

Multi-Coded Welding

Think for a moment about all the types of welding techniques. There are MIG (Metal Inert Gas) welding rigs and TIG equipment, which uses non-consumable tungsten. Right away, then, we have the first pair of codes. If the welder wants to add them to his list, he’ll need to pass the tests. During the course of the tests, electrode mastery and filler expertise are demonstrated. The welder shows off an ability to manipulate a weld pool. The quality of a finished weld is visually inspected. It’s even examined by non-destructive test instruments, which identify hidden weld discontinuities. The welder basically works upon a sample plate to create a test-specified joint, as set by a governing body and administered by a weld inspector.

A By-The-Numbers Profession

Random numbers and/or titles aren’t just given out to certified welders. There are European Standards, plus the American Welding Society and the ISO codes to satisfy. The British Standards BS4872 code is popular. Then there are the ASME IX credentials. Some codes are issued so that a welder can lay claim to a specific welding technique. For others, they tell an employer the welder is certified to work on pressure vessels or unfired containers. Offshore work, structural steel or mild steel jobs, the codes cover every imaginable field. Indeed, while many codes are considered general purpose qualifications, others test candidates for particular skills. These are the specialized aptitude tests, which certify advanced qualification levels.

Even pipe welding positions fall under the coded welding prospectus. Using Groove weld techniques (labelled “G”) and Fillet welds (labelled “F”), integers are matched to the codes. They convey important information. For example, a simple 1G groove weld is conducted horizontally. For circumference-covering pipe welds, the numbers climb. The codes go rise as high as 6G. It’s here that inclined pipes joints defeat lesser welders. However, for a coded welding professional, the project is tough but not impossible. That 6G label means a 45-degree pipe inclination is manageable. It slots into place on a resume alongside a series of ISO codes. Or maybe they’re British Standards, with a side of American Welding Society credentials. Either way, the codes demonstrate specific competencies in numerous welding techniques.

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