What is to be Inspected before Welding?

Before Welding

• Availability of Welding Procedure Specification (WPS), Work Procedure, Quality Assurance Plan, Working Documents (WD)
• Joint identification, fit-up groove design, fit up dimensions
• Method of fit-up (i.e clear requirements)
• Accessibility for welding, welding platforms
• Provision of window opening in fit up groove (if required)
• DE-preservation & cleanliness of joint
• Cleaning of pipe inside
• Proper supporting of joint
• Fit up clearance report

• Availability of calibrated welding machines & baking ovens
• Purging arrangement including dam type and location
• Purity and type of purging gas
• Preheating arrangements (if required)
• Filler material color coding, identification and baking arrangement
• Welding sequence
• Qualified welder
• Separately identified tools & tackles, in case of SS material
• Proper shielding/wind protection arrangements for joint