Fabrication Defect

1 case · 1 image

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Ferritic Bainitic Capture method: Surface Aspect clear all

Fabrication Defect — sub-branches

Not according to spec 1Welding Defect 4

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Aspect of the butt welded joint surface, after grinding to remove the reinforcement, polishing and macro etching. There are multiple cracks, transverse to the weld and restricted to the weld metal. The surface hardness are 167HB for the tube (left side), 180 HB for the Forged T (right side) and 272 HB for the weld metal, suggesting lack of a suitable PWHT.
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ML00071 / Jan.2019
Reheating Cracking of a CrMo Vessel Weld
M - CrMo SteelP - In Field WeldAp - EnergyCd - Welding Defect
Cm - Surface AspectDf - Cracks