SECTION 380:20-1-14. Welding procedure specifications for butt weld

(a)   Specifications.

(1)   Number Okla. D.P.-1 (without backing ring)

(2)   Number Okla. D.P.-2 (with backing ring)

(b)   Process.

(1)   S.M.A.W.- Shielded MetalBArc Welding

(2)   G.M.A.W. - Gas Metal-Arc Welding

(3)   G.T.A.W. - Gas Tungsten-Arc Welding

(4)   O.F.G.W. - Oxyfeul Gas Welding

(c)   Base Material. The base material shall conform to the specifications of the following:

(1)   ASME Boiler & Pressure Vessel Code, as applicable

(2)   A.P.I. STD 1104 as applicable

(3)   AWS Part A, as applicable

(d)   Forgings. Filler metal; The filler metal shall conform to the applicable code requirements of specifications under which the welder is being qualified, and restricted to the particular welding process being utilized. Applicable codes: ASME Section IX, current Edition and addenda, ASME B31.1, current Edition and addenda, API 1104, current Edition and addenda, and AWS D1.1, current Edition and addenda.

(e)   Position. The welding shall be done in test position 2G and 5G or 5G or 6G, as described in Section IX of the ASME Boiler and Pressure Vessel Code or positions described in AWS D1.1 or D1.3.

(f)   Preparation of base material. The edges or surfaces of the parts to be joined by welding shall be prepared by being machined, ground or gas cut to form groove design joints, as shown on the attached appendices and shall be cleaned of all oil and grease and excessive amounts of scale or rust. Fillet design joints shall not be used for welder certification.

(g)   Nature of electric current. The current shall be DC, the base metal to be on the negative side of the line.

(h)   Welding technique. The welding technique, electrode size and mean voltages and currents for each electrode shall be substantially as shown on attached appendices.

(i)   Appearance of welding layers. The welding current and manner of depositing the weld material shall have the appearance shown on the attached appendices. There shall be practically no undercutting on the side walls or the welding groove or the adjoining material.

(j)   Cleaning. All slag or flux remaining on any bead of welding shall be removed before laying down the next successive bead.

(k)   Defects. Any cracks or blow holes that appear on the surface shall be removed by chipping, grinding or gas gouging before depositing the next successive bead of welding.

(l)   Heat treatment. The heat treating or stress relieving of completed welds, when required, shall be performed in accordance with the requirements of the specific code under which the work is conducted.

[Source: Amended at 19 Ok Reg 2787, eff 7-25-02; Amended at 23 Ok Reg 2984, eff 7-13-06; Amended at 26 Ok Reg 198, eff 11-1-08 (emergency); Amended at 26 Ok Reg 2254, eff 7-1-09]