WELDING PROCEDURE SPECIFICATION

TM 5-5420-279-23

WPS No. 0070

WILLIAMS FAIREY ENGINEERING LTD.

APPROVAL REPORT:

WELDING PROCEDURE SPECIFICATION - WPS NO: 070

W.P.A.R. No: 52

Approved by:

Sheet No: 1

Issue: 1

Date: 16-09-98

K.L. No: 10813

Primary Specifications:

Material Specification:

Material Dimensions.

BS EN 729

BS EN 10115S 355NL

Thickness: 6.25 to 25mm

BS 7191 1989 355EM

Pipe Dia: N/A

Type Of Joint:

Welding Process:

Welding Position:

Single bevel butt weld

Flux cored M.A.G.

PA/PB

Run Sequence & Weld Dimensions:

Joint Preparation:

Preparation Method: Machining/Grinding. Remove paint and scale

Welding Details:

Wire feed

Travel

Heat

Size of

Type of

Run No.

Process

Current A

Voltage

Speed

Input

filler metal

Current

M/Min

mm/Min

J/mm

Flux cored

1.2mm

270 - 300

27 - 33

DC + VE

9.5 - 12.0

M.A.G

Additional

Flux cored

1.2mm

270 - 290

28 - 33

DC + VE

9.5 - 11.5

runs

M.A.G

Filler Metal Classification & Trade Name: AWA A5. 29. 80. E80T5 - G.

OERLIKON FLUXOFIL 40

Gas Type Shielding:

Gas flow Shielding:

Tungsten Electrode Type:

Specshield 20%

30 - 40 cu/ft/hr

N/A

Backing: N/A

Size: mm N/A

Details of Back Cutting / Backing: N/A

Preheat Temperature:

Interpass temperature:

Transfer Mode: Spray

Min +5C

Max 150C

Other Information:

Ensure that the joint is free from surface contamination.

All unsound tack welds must be removed or dressed.

For a combined joint thickness of 36mm to 75mm, and plate thickness of 20mm to 75mm a

70C preheat must be used for tack welding and welding.

For plate and combined joint thickness over 75mm a 100C preheat is to be used for tack

welding and welding

Appendix K Page 77