Mogba Nigeria Ltd
Welding Procedure Specification (WPS)
WPS No: MNL/WPS/01
Revision: 01
Welding Process:
Type: Manual
Date: August, 17th 2023
SMAW
Joint Design Used:
Bevel groove weld
Backing material: N/A
Root Opening: 3mm (+2mm, -3mm)
Groove Angle: 60 deg (+10, -5 deg)
Base Metals
Position
Position of groove:
2G
Welding Position: Horizontal
Electrical Characteristics
Current: DC Electrode Positive
Material Spec: API 650 Grade 50
AWS
Thickness: 6mm, 8mm & 20mm
A 283 Gr. C ASTM
Technique: Stringer or Weave: Both
Multi-pass or Single Pass: Multi-pass
Number of Electrodes: One
Filler Materials
AWS Specification: A5.1
AWS Classification: E7018
Inter-pass Cleaning: Grinding & Wire Brush
Post weld Heat Treatment
Temp: N/A
Preheat
Time: N/A
Minimum Preheat & Inter-pass Temp: 150 F/65 OC
Maximum Inter-pass Temp: 250 OC
Weld
Pass
Sequence
Process
Root Pass
SMAW
Hot Pass
Joint
Designation
Base
Metal
Thickness
Filler Metal
Current
Volts
Travel
Speed
110-145
24-28
N/A
T1
Class
Dia.
B-U2a
U
E7018
3.25mm
Type &
Polarity
DC-EP
SMAW
B-U-2a
U
E7018
4.00mm
DC-EP
140-180
24-28
N/A
Fill Pass
SMAW
B-U-2a
U
E7018
4.00mm
DC-EP
140-260
24-28
N/A
Capping
SMAW
B-U-2a
U
E7018
4.00mm
DC-EP
140-260
24-28
N/A
Joint Design
Amps
Note: T1 = base metal thickness, , R = 3mm α = 60O, backing strip = 6mm
Prepared By: THEOPHILUS
Sign:
E’OSATH
Date: 17/08/2023