Welded Joint

5 cases · 12 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Application: Subsea clear all

Welded Joint — sub-branches

Welded Joint 5

Results

SortNewestOldestTitle A-ZTitle Z-A
Aspect of the valve body after cutting a slice containg the crack and the welded joint of the body to the insert (fillet weld). The cracking was arrested at the position of this welded joint.
56
VIEW
ML00134 / Aug.2020
Brittle Fracture of a Superduplex Valve Body
M - Super Duplex Stainless SteelP - Fabrication WeldAp - SubseaCd - Brittle Fracture
Cm - NaOH Electrolytic Etched MacroDf - Welded Joint
Microstructure of the welded region of the padeye, at the fusion line. The weld metal is dendritic, austeno ferritic, in the left side of the figure. The heat affected zone is in the center of the figure and shows no changes in relation to the base metal. The padeye base metal is to the right side of the figure.
120
VIEW
ML00122 / Feb.2018
Crevice Corrosion in a Subsea System
M - Austenitic Stainless SteelP - CaseAp - Oil and GasCd - Crevice
Cm - Micrography by OM using A262 Method ADf - Welded Joint
Macrography of the welded joint between a forging connector (right side) and a seamless tubing (left side). It was welded in two passes by GTAW process.
168
VIEW
ML00100 / Nov.2017
Superduplex Tubing to Forging Welded Joint
M - Super Duplex Stainless SteelP - Fabrication WeldAp - SubseaCd - Welding
Cm - NaOH Electrolytic Etched MacroDf - Welded Joint
Macrosection transverse to the longitudinal seam weld, presenting the two passes, the first welded from the internal side and the second welded from the external side. It is possible to see the columnar grains of the weld and the heat affected zone (HAZ) from each pass. See the schematic drawing in the next figure
427
VIEW
ML00053 / Mar.2017
SAW Longitudinal Seam of X70 Pipe
M - Microalloyed SteelP - Longitudinal Seam Welded PipeAp - SubseaCd - Welding
Cm - NItal Etched MacroDf - Welded Joint
Macrography of the welded joint upper part. Transverse section showing the different zones studied in this ML. See the schematic drawing in the next image.
454
VIEW
ML00045 / Aug.2017
Subsea Tubular F6NM Martensitic SS
M - Martensitic Stainless SteelP - Fabrication WeldAp - OffshoreCd - Welding
Cm - Kalling Etched MacroDf - Welded Joint

More from these cases

ML00134 — Brittle Fracture of a Superduplex Valve BodyM - Super Duplex Stainless SteelP - Fabrication WeldAp - SubseaCd - Brittle Fracture
Macrographic detail of the valve at the welded joint of the SDSS body (left side of the figure) to the Alloy 625 insert (right side of the figure), by a fillet weld. The cracking was arrested at the position of this welded joint.
49
VIEW
ML00134 / Aug.2020
Brittle Fracture of a Superduplex Valve Body
M - Super Duplex Stainless SteelP - Fabrication WeldAp - SubseaCd - Brittle Fracture
Cm - NaOH Electrolytic Etched MacroDf - Welded Joint
Low magnification micrography of the valve at the welded joint of the body to the insert (fillet weld). The cracking was arrested at the position of this welded joint because the structures of the weld metal, insert and heat affected zones are tough (austenitic in the weld metal and insert, and free from sigma in the HAZ) .
48
VIEW
ML00134 / Aug.2020
Brittle Fracture of a Superduplex Valve Body
M - Super Duplex Stainless SteelP - Fabrication WeldAp - SubseaCd - Brittle Fracture
Cm - NaOH Electrolytic Etched MicroDf - Welded Joint
ML00122 — Crevice Corrosion in a Subsea SystemM - Austenitic Stainless SteelP - CaseAp - Oil and GasCd - Crevice
Micrographic detail of the fusion line of the welded joint of the padeye. The connector where the padeye was installed was welded to the case, but presented no evidences of corrosion.
110
VIEW
ML00122 / Feb.2018
Crevice Corrosion in a Subsea System
M - Austenitic Stainless SteelP - CaseAp - Oil and GasCd - Crevice
Cm - Micrography by OM using A262 Method ADf - Welded Joint
ML00053 — SAW Longitudinal Seam of X70 PipeM - Microalloyed SteelP - Longitudinal Seam Welded PipeAp - SubseaCd - Welding
Schematic drawing presenting the two passes, the first welded from the internal side and the second welded from the external side.
75
VIEW
ML00053 / Mar.2017
SAW Longitudinal Seam of X70 Pipe
M - Microalloyed SteelP - Longitudinal Seam Welded PipeAp - SubseaCd - Welding
Cm - Identification drawingDf - Welded Joint
ML00045 — Subsea Tubular F6NM Martensitic SSM - Martensitic Stainless SteelP - Fabrication WeldAp - OffshoreCd - Welding
Schematic drawing presenting the different zones of the welded joint at the upper part.
49
VIEW
ML00045 / Aug.2017
Subsea Tubular F6NM Martensitic SS
M - Martensitic Stainless SteelP - Fabrication WeldAp - OffshoreCd - Welding
Cm - Identification drawingDf - Welded Joint
Macrography of the welded joint, at the root position, presenting the different zones studied in this ML. Transverse section. See the schematic drawing in the next image.
47
VIEW
ML00045 / Aug.2017
Subsea Tubular F6NM Martensitic SS
M - Martensitic Stainless SteelP - Fabrication WeldAp - OffshoreCd - Welding
Cm - Kalling Etched MacroDf - Welded Joint
Schematic drawing presenting the different zones of the welded joint
35
VIEW
ML00045 / Aug.2017
Subsea Tubular F6NM Martensitic SS
M - Martensitic Stainless SteelP - Fabrication WeldAp - OffshoreCd - Welding
Cm - Identification drawingDf - Welded Joint