High Alloy Steel

1 case · 2 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Product: Piping Detail focus: Welded Joint clear all

High Alloy Steel — sub-branches

Duplex Stainless Steel 1

Results

SortNewestOldestTitle A-ZTitle Z-A
Macrographic detail of the pipe to weldolet weld, and the through wall cracking in the pipe from the margin of the weld. The pipe thickness is only 5 mm (SCH 10S) but the large thickness of the fitting required several weld passes to create a full penetration weld.
84
VIEW
ML00150 / Dec.2018
Vibration Induced Fatigue in a SS Oil Piping
M - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Cm - NaOH Electrolytic Etched MacroDf - Welded Joint

More from these cases

ML00150 — Vibration Induced Fatigue in a SS Oil PipingM - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Macrography of a transverse section of the welded joint, at the fatigue crack position in the pipe. It is very interesting to observe that the crack propagated from the margin of the weld, independently of the defects in the weld (porosity and lack of fusion), and without relationship with the unbalanced structure at the cap (with a large amount of ferrite). These characteristics are detailed in the next figures.
89
VIEW
ML00150 / Dec.2018
Vibration Induced Fatigue in a SS Oil Piping
M - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Cm - NaOH Electrolytic Etched MacroDf - Welded Joint