Damage

2 cases · 5 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Product: Finished Product Standard: A Capture method: Kalling Etched Macro clear all

Damage — sub-branches

Brittle Behavior 4Corrosion 6Ductile Behavior 1Fabrication Defect 3Fatigue 4High Temperature 2Hydrogen 1Repair Defect 1Wear 1

Results

SortNewestOldestTitle A-ZTitle Z-A
This macrography shows a longitudinal section of the tubular cast fitting. The external side is to the top and the internal side to the bottom. The buttering layer is evident in the groove that would be welded to the centrifugall cast tube (right side) and part of the ID and OD. During the buttering welding of the casting the cracks were not detected because they were formed in the center of the thickness and some have propagated to the internal diameter, but not to the external diameter. They opened only when the buttered casting was welded to the tube.
21
VIEW
ML00173 / May.2021
Welding Cracks in an Aged HP Cast Fitting
M - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding
Cm - Kalling Etched MacroDf - Longitudinal Section
17-4 PH rod, tubular, OD 10.6mm, wall thickness about 3.5 mm. Macrography of the rod in a transverse section showing the pitting in a position where it is almost through wall.
86
VIEW
ML00121 / Feb.2018
Pitting Corrosion in a Subsea System
M - Austenitic / MartensiticP - Rod & CylinderAp - SubseaCd - Pitting Corrosion
Cm - Kalling Etched MacroDf - Pitting

More from these cases

ML00173 — Welding Cracks in an Aged HP Cast FittingM - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding
Macrographic detail close to the internal diameter (ID in the bottom), where the cracks were detected by dye check (after removal of the damaged part of the cast fitting). Close to the surface it is possible to see the layers of the weld metal that corresponds to the cast fitting buttering.
21
VIEW
ML00173 / May.2021
Welding Cracks in an Aged HP Cast Fitting
M - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding
Cm - Kalling Etched MacroDf - Cracks
Welding Cracks in an Aged HP Cast Fitting
2
VIEW
ML00173 / May.2021
Welding Cracks in an Aged HP Cast Fitting
M - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding
Cm - Kalling Etched MacroDf - Cracks
Welding Cracks in an Aged HP Cast Fitting
1
VIEW
ML00173 / May.2021
Welding Cracks in an Aged HP Cast Fitting
M - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding
Cm - Kalling Etched MacroDf - Microhardness identations