welder qualification
saleem manhappulath
Manikandan J
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Karunakaran Karan
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Amol Betkar
Dear Saleem,
As per the AWS D1.1/D1.1M:2020 Structural Welding Code – Steel, the qualification range for a welder who qualifies on a 6" diameter pipe with a wall thickness of 10.97 mm using the specified electrodes (E6010 for root and hot pass, and E7018 for the fill and cap passes) would be as follows:
Diameter Qualification Range
- When a welder qualifies on a pipe with a diameter of 6 inches, they are qualified to weld pipe diameters ranging from 2-7/8 inches (73 mm) and larger.
Thickness Qualification Range
- If the test coupon has a thickness of 10.97 mm (approximately 7/16 inches), the welder would be qualified to weld material thicknesses ranging from 3/16 inches (5 mm) to 2 times the thickness of the test coupon. This results in a qualification range of 3/16 inches to 21.94 mm (approximately 7/8 inches).
Summary
- Diameter Range: 2-7/8 inches (73 mm) and larger.
- Thickness Range: 3/16 inches (5 mm) to 7/8 inches (21.94 mm).
These ranges are determined based on the requirements set forth in AWS D1.1, which provides the necessary guidelines to ensure welders are properly qualified for a range of diameters and thicknesses beyond their test coupon. It is important to note that these qualification ranges are contingent on the specific procedure and test details as outlined in the AWS D1.1 code. Always refer to the latest edition of the code for the most accurate and detailed information.
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