AWS D1.1 2015 – Type of qualification tests required – Welder and welding operator performance qualification

Type of qualification tests required in groove weld

  • Visual inspection, Clause 4.22.1
  • Guided – bend test,
    • Clause 4.16.2 (non-tubular) and Table 4.11
    • Clause 9.17.1 (tubular)
  • Substitution of RT (except GMAW-S process),
    • Clause 4.22.3 (non-tubular) and Table 9.13
    • Clause 9.18 (tubular)

Type of qualification tests required in fillet weld

  • Visual inspection, Clause 4.22.1
  • Macroetch, Clause 4.22.2, Clause 9.22
  • Fillet weld brack, Clause 4.22.4, Clause 9.21

Tack welders

  • For non-tubular, Clause 4.16.2
  • For tubular, Clause 9.17.2

Test specimens

  • Non-tubular
    • Welder: min. 180 mm in length for all positions, discard 32 mm both side for RT test.
    • Welding operator: min. 380 mm in length for all positions, discard 75 mm both site for RT test.
  • Tubular
    • Test coupon, OD >= 100 mm: min. one-half of pipe, see 9.22.2
    • Test coupon, OD < 100 mm: 100% RT, see 9.22.2

Guided bend test method

  • Preparation of test specimen,
    • See Figure 4.8, 4.9, 4.10 or 4.14 (non-tubular)
    • See Figure 9.28 (Tubular)
  • T < 10 mm, 2 specimens of face- and root- bend test.
  • T > = 10 mm, 2 specimens of side bend test.

RT procedure

  • Clause 4.22.3.1 (non-tubular)
  • Clause 9.22.2 (Tubular)
    • RT Test Procedure and   Welded test pipe or tubing 4 in [100 mm] in diameter or larger shall be examined for a minimum of one-half of the weld perimeter  selected  to  include  a  sample  of  all  positions welded.

For example,

  • A test pipe or tube welded in the 5G, 6G, or 6GR position shall be radiographed from the top centerline to  the  bottom  centerline  on  either  side.
  • Welded test  pipe  or  tubing  less than  4  in  [100  mm]  in diameter shall require 100% RT.

Macroetch test

  • T-Y-K connection, Clause 9.20.1.

Acceptance Criteria

Guided bend test, Clause 4.9.3.3

RT acceptance criteria, Clause 6.12.2, except 6.12.2.2 shall not apply

Fillet weld break, Clause 4.22.4.1

Essential variables, Clause 4.19  and Table 4.12

Qualification

  • Suggest form: Annex M or get free template here.
  • The welder and welding operator who passed WPS qualification, he also qualified the requirement in Clause 4.15. Read more range of qualification in 6GR position for pWPS, here.

Period of effectiveness

  • Within six months, Clause 4.2.3
  • Retest, Clause 4.24.1

Common questions

  • Qualification responsibility, see Clause 4.2.2.2.
  • Change F-Number are not allowed, see able 4.12 line 2.
  • Omission of backing is not allowed, see Table 4.12 line 6.
  • Thickness of test coupons are recommended at least 25,4 mm (plate) or OD > 100 mm, T > 10 mm (tubular) to maximum thickness range, see Table 4.11 (plate) and Table 9.14 (Tubular).
  • Test specimens are recommended DN 200 12.7 mm.
  • Third party should invite to endorse the documents, such ABS, DNV, LR, BV or other international society classification.

 

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Nguyen Duy Bien
 

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