General View

3 cases · 3 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Coarse Structure clear all

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Aspect of the 3 1/2" diameter tube after the water leakage in high temperature.
962
VIEW
ML00180 / Mar.2022
Local Melting of Copper Cooling Tubes
M - Pure CopperP - Cooling TubeAp - SiderurgyCd - Overheating
Cm - Aspect Before AnalysisDf - General View
The carcass was manufactured using niobium stabilized plates, grade AISI 347, with circumferential welds, where the through wall cracks were detected.
300
VIEW
ML00174 / Jul.2021
Carburization of a 347 SS Welded Joint
M - Austenitic Stainless SteelP - Fabrication WeldAp - EnergyCd - Carburization
Cm - Field photoDf - General View
The shaft was removed from service without a failure. It was 4' long and the diameters varied from 2 1/2" to 4 1/2". It was analyzed to be specified for purchasing a new one but properties evidenced bad ductility and brittle behavior even at ambient temperature, associated to a microestruture "as hot rolled".
1238
VIEW
ML00152 / Dec.2018
Low Alloy Steel Pump Shaft
M - High Strength Low AlloyP - ShaftAp - Oil and GasCd - Removed From Service
Cm - Aspect Before AnalysisDf - General View