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Reg. 609

Tests for initial qualification of a welder

 
(B) A welder shall be required to undergo and pass the following practical tests.
  1. Material for tests :

The material of plates, tubes, pipes and electrodes used for these tests shall conform to the requirements of appropriate Regulations as may be applicable in each case.
  2. Test welds for initial qualification (Electric or Gas) :
  (a) Plate Welding.-
  (i) One groove welded joint of two pieces of plates with double Vee or Double U grooves on boiler quality plates over a length of 300 mm in the following positions (size of plates to be welded being not less than 229 mm x 381 mm x 16 mm (9" x 15" x 5/8” each):-
  (1) Flat Position XIII/6.- Plate in a horizontal plate with the weld metal deposited from above.
  (2) Horizontal Position XIII/7.- Plate in a vertical plane with the axis of the weld horizontal.
  (3) Vertical Position XIII/8.- Plate in a vertical plane with the axis of the weld vertical.
  (4) Overhead Position XIII/9.- Plate in a horizontal plane with the weld metal deposited from underneath.
    Qualification in position XIII/7 or XIII/8 shall qualify also for position XIII/6.
    Qualification in position XIII/9 shall qualify for positions XIII/6, XIII/7 and XIII/8 also.

  (ii) One fillet welded joint over a length of 381 mm. (15 inches) using plates of not less than 16 mm. (5/8 inches) in the following positions:-
  (1) Flat Position XIII/10.- Plates so placed that the weld is deposited with its axis horizontal and its throat vertical.
  (2) Horizontal Position XIII/II.- Plates so placed that the weld is deposited with its axis horizontal on the upper side of the horizontal surface and against the vertical surface.
  (3) Vertical Position XIII/12.- Plates so placed that the weld is deposited with its axis vertical.
  (4) Overhead Position XIII/13.- Plates so placed that the weld is deposited with its axis horizontal on the under side of the horizontal surface and against the vertical surface.
    Qualification in positions XIII/11, or XIII/12 shall qualify for position XIII/10.

    Qualification in position XIII/12 shall qualify for position XIII/10, XIII/11 and XIII/12.

  (b) For Pipe Welding.-
  (1) One test on groove weld joint for each of the following welding positions:-
  (i) Horizontal Rolled.-

Pipe with its axis horizontal and rolled during welding so that the weld metal is deposited from above with the axis of the weld horizontal.
  (ii) Horizontal Turned.-

Pipe with its axis horizontal the upper half welded first, the pipe then being turned through 180 degree and the other half then welded.
  (iii) Vertically fixed.-

One test of groove welded joint with the axis of the pipe in a vertical position and the seam welded circumferentially in a horizontal position.
  (iv) Horizontal fixed.

One test of groove welded joint with the axis of the pipe in a horizontal position and the seam welded without rotating the pipe.
    Qualification in positions (ii) or (iii) shall qualify also for position (i), qualification in position (iv) shall qualify for position (i) or (ii).
  (2) One weld of a branch to a pipe.
    The size of pipe to be welded shall be not less than 127 mm. (5 inches) in external diameter and 10 mm. (3/8 inch) thick, and a branch pipe shall not be less than 89 mm. (3-1/2 inches) outside diameter and 6 mm. (1/4 inch) thick.
(c) For Tube Welding.-

A butt welded joint to two pieces of boiler tubes with the axis in a vertical position, and tubes of same size fixed in adjoining positions. This test shall be in addition to the test for pipe welding under clause (b).
     
 
 
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