edge preparation shall be as per Figure-.3 For pipe butt welds, details of edge preparation shall be as per. One set of straps is bent with the face of the weld to the outside, and the other set is bent with the root of the weld to the outside. . For the weld procedure that those coupons were used for, there was a series of inspection criteria that must be met before the welder becomes qualified on that procedure. after cutting into 4 pieces considering machining allowance. . The root and face bends are done in a similar fashion, but used to test the ductility of the weld with the base material. . In this case, the 36 butt weld coupons required both NDT and. After successfully completing all these requirements, the welder is determined to be qualified for the procedure being tested. For DT on these coupons, there was a total of 12 straps cut out and prepped for testing. . The pictures shown below are of weld test coupons which were recently used to test a welders skills.
2.0 : test coupons.1 : Depending upon the range to be qualified, choose.
Ref er Table -.2 For plate butt welds, details of edge preparation shall.
Material should be seamless pipe SA106Gr B or equivalent.
Weld coupon preparati.
2 inches pipe test coupon shall be completed in the 6G position.
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First, the welder completes the root pass and it must be visually inspected (VT) and approved by the welding inspector before being allowed to proceed. . For Pipe Welder :3.3.1 The order of removal of test specimens shall be as per Figure-.3.3.2 For width and number of bend specimens, refer table below: OD in mm Width in mmThickness inmmBend specimens requiredRootFace Side 10019T Octual #T 1902 - side bend shall. In Service Sleeves, in Service Backing Bars, in Service End Caps. The strap is then mechanically bent to fracture it and the cross section is visually examined for any imperfections. Procedure FOR mcdonalds free big mac coupon qualification.0: base metals1.1 : The material used for the qualification shall be same as material used on job or equivalent material listed in table QW -422 of asme. To do this, a notch or nick is intentionally made by a cutting the strap on the weld face to help it fracture in the center line of the weld. . Butt Weld Coupons, branch Connection Coupons, in Service Pipe Coupons. Requirement OF tests:.1, for Structural Tack Welders :3.1.1 Break Test as per Figure-4.3.2. After passing the RT criteria, the coupon moved on to destructive testing. .