Weld Fit-Up Inspection Employee Training

Employee Training

Weld Fit-Up Verification steps to success

Just leave the gap at ¼”. The welder will be able to weld across that!

Let’s see… the WPS calls for a 1/8” MAX gap!

This is a Required ASME Code Verification Verification

Is this what we call teamwork?

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Employee Training Weld Fit-Up Verification

Good fit up of the joint is crucial for high quality welding. Poor fit up can make it difficult for the welder to fuse both sides s ides of the weld root. An unfused root can be a

stress riser for fatigue cracking and/or a site for deposit formation and corrosion. Large diameter vessel shells, pipe and fittings are often out of round and require adjustment during fit-up. Joint alignment can be done with mechanical devices and should be free of depressions, hammer marks, and arc strikes. st rikes. Heat is not used in

the alignment of joints where it has been determined that the corrosion resistance






Definitions Backing

A material or device placed against the back-side of the joint to support and retain molten weld metal.

Base metal

The metal to be welded.

Bevel angle

The angle on one side or surface of the member.

Groove angle

The total included angle of the groove that makes up the weld joint.

Crack

A fracture in the weld or base metal.

Complete penetration

When the weld metal or tack weld metal extends through to the bottom of the weld joint.

Filler metal

The metal or alloy to be added in making a welded joint.

Lack of fusion

A non-standard term indicating indicating a weld weld defect in which fusion did not occur between weld metal and fusion faces or adjoining weld beads.






Tasks of Fit-Up Verification ● Material ID Traceability Verification ● Welder Qualification Verification ● Weld Joint Preparation Check ● Weld Joint Fit-Up Verification ★ Alignment

Check






Material ID Traceability Traceability Verification ● Material Specification and Grade ● Heat No. / Plate No. Part No. Identificati






Welder Qualification Qualification Verification Verification ● Welder is currently qualified ★ Welding Process Qualification ★ Base Metal Qualification








Weld Joint Preparation Check






Weld Joint Fit-Up Fit-Up Verification Verification






Tack Weld Condition Verification






Documentation Completion ● Head Fit-Up Documentation

Weld Fit-Up Inspection Employee Training

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