Aspect Before Analysis

2 cases · 3 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Product: Welded Joint Microstructure: Granular clear all

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The 6 1/2" nominal diameter longitudinal seam welded pipe is internally cladded with Alloy 625. The pipe was manufactured by forming a cladded plate (probably welded by rolling) and welding it longitudinally. The pipe was heat treated (quenched and tempered) after the seam weld.
97
VIEW
ML00133 / May.2018
Seam Welded Pipe Cladded with Alloy 625
M - LAS / Ni AlloyP - Longitudinal Seam Welded PipeAp - Oil and GasCd - Welding
Cm - Aspect Before AnalysisDf - Welded Joint
The welded joint of the flat position is shown from the root side. It is possible to see that the use of the backing generated the possibility for melting the base metal out of the groove, without detection of this condition during welding, responsible for creating defects and avoiding the WPS qualification.
102
VIEW
ML00118 / Jan.2018
Non qualified GMAW of Aluminum Plates
M - Aluminum Magnesium ManganeseP - Welded Testpiece for QualificationAp - ShipCd - Non qualified
Cm - Aspect Before AnalysisDf - General View

More from these cases

ML00118 — Non qualified GMAW of Aluminum PlatesM - Aluminum Magnesium ManganeseP - Welded Testpiece for QualificationAp - ShipCd - Non qualified
The welded joint of the vertical up position is shown from the root side. It is possible to see that the use of the backing generated the possibility for melting the base metal out of the groove, without detection of this condition during welding, responsible for creating defects and avoiding the WPS qualification.
122
VIEW
ML00118 / Jan.2018
Non qualified GMAW of Aluminum Plates
M - Aluminum Magnesium ManganeseP - Welded Testpiece for QualificationAp - ShipCd - Non qualified
Cm - Aspect Before AnalysisDf - General View