AWS D9.1M D9.1 pdf free download

AWS D9.1M D9.1 pdf free download.Sheet Metal Welding Code.
5.5 Responsibility for Qualification5.5.1 Each Contractor shall be responsible for the qualification of procedures, whether the qualification testing is conducted by the Contractor or an independent third party, subject to the following conditions:(1) The Procedure Qualification Record (PQR)shall meet all of the procedure qualification requirements of this code, and(2) The Contractor shall assume specific responsibility for the procedure qualification work completed by Signing and dating the W elding Procedure Specification (WPS) and Procedure Qualification Record (PQR). 5.5.2 Records of welding procedures qualified in accordance with this code shall be maintained by the Contractor and shall be available for inspection as required by the Engineer, the Owner, or their representative (see Annexes D and E for suggested forms).5.6 Duration of Procedure Qualification5.6.1 Welding procedures qualified to a previous editions of AWS D9.1 remain qualified in this edition except as required by5.6.2. AWS D9.1 5.6.2 Procedures shall be requalified whenever a change is made in an essential variable that is outside the range allowed by the variable (see5.3).  6. Qualification of Arc Welders and Arc Welding Operators  6.1 Prior Welder and W elding Operator Qualification  6.1.1 The Engineer, exercising proper discretion, may accept evidence of previous qualification of welders and welding operators to be used on work being performed under this code.6.1.2 Welders and welding operators performing procedure qualification test welds meeting the procedure qualification acceptance criteria in Clause 5, Arc Welding Procedure Qualification, shall be considered as qualified to perform welding without additional qualification testing, subject to the limitations defined in 6.3. 6.2 Required Welder and Welding Operator Qualification Tests 6.2.1 General. All welders and welding operators permitted to weld under this code shall be qualified. Welding shall be performed in accordance with a WPS qualified under Clause 5, Arc W elding Procedure Qualification. Contractors, at their option, may administer a general knowledge test of the welder S and welding operator s general welding knowledge (see Annex J).6.2.2 Groove Welds. Test coupon dimensions and test positions for qualification of groove welds are given in Figure 2.6.2.3 Fillet Welds. Welders and welding operators who qualify for groove welds under 6.2.2 are automatically granted qualification for fillet welds (see Figure 3 or Annex G). Qualification testing using either a lap joint fillet, T-joint fillet, or the actual joint fllet conflGuration is permitted at the option of the Contractor, unless otherwise specified in the WPS. Test positions for qualification of fillet welds are given in Figure 3. 6.2.4 Typical Joints. Qualification of any groove weld shown in Annex G provides qualification for any groove or fillet weld. Qualification of any fllet weld shown in Annex G provides qualification for any fillet weld. Qualification of a fillet weld does not provide qualification for a groove weld.  6.3 Limitations of W elder and Welding Operator Qualifications.The limits of essential variables governing welder and welding operator qualification are described in 6.3.1 through 6.3. 10.6.3.7 A change in the type of welding current from AC to DC, or vice versa, requires requalification. 6.3.8 For GMAW and FCAW, a change in the mode of metal transfer, as indicated below, requires requalification:(1) Short circuiting transfer to any other mode of metal transfer. (2) Any mode of metal transfer to short circuiting transfer.  6.3.9 Shielding Gas 63.9.1 Deletion, but not the addition, of backing gas requires requalification.6.3.10 Position Qualification. Changes in the welding position (see Figures 2 and 3) require requalification other than listed below:(1) Qualification in the 1G or 1F position shall qualify the welder or welding operator only in the flat position.AWS D9.1M D9.1 pdf download.