Mechanical Testing (Bend Test)for Welder Performance Qualification as per ASME Section IX

Table QW 452.1 a gives the relationship among thickness of weld metal , types of bend testing and number of test coupons required for positions such as 1G,2G,3G,4G in both pipe and plates.

If the thickness of weld metal is less than 10mm then, the require bend testing method is the face and root bend & the number of the test specimen required is one each.

If the thickness of weld metal is 10mm to less than 19mm then we can adopt either face and root bend or side bends. The number of the test specimen remains unchanged and will be one each.

If the thickness of weld metal is 19mm and over then we can only use side bends for qualification because there is no enough space between the former and the die to perform bending.

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