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