Surface Lamination

Main Member Type: Base Metal
Attached Member/ Detail Type: Plate Girder
Error Type: Surface Lamination
Description of Error: Laminar discontinuity in the base metal apparent on the surface of the base metal.
Solution Recommended:

Sketch

The recommended solutions are based on the description of the discontinuity:

1) for any discontinuity 1 inch in length or less, no plate repair is required, and need not be explored.

2) For any discontinuity over 1 inch in length and 1/8 inches maximum depth, no plate repair required, but the depth should be explored.

3) For any discontinuity over 1 inch in length with depth over 1/8 inches but not greater than 1/4 inches, removal is required, but not need weld.

4) For any discontinuity over 1 inch in length with depth over 1/4 inches but not grater than 1 inch, completely remove and weld are required.

Aggregate length of the welding shall not exceed 20% of the length of the plate edge being repaired.

5) For any discontinuity over 1 inch in length with depth greater than 1 inch, see AWS 3.2.3.7.

Required Final Checks / Verification: If welding is required, use a single arc semi-automatic submerged arc weld(S.A.W.) after preparation. Magnetic particle inspection (M.T.) and/or ultrasonic inspection (U.T.) are require for the final checks.
Other Possible solutions: Yes.
Was Repair Successful ?: N/A
Remarks: N/A.

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