Welded Joint

5 cases · 17 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Standard: ALLOY clear all

Welded Joint — sub-branches

Flat Position 3Horizontal Position 3Overhead Position 3Vertical Up Position 3Welded Joint 4

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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.
96
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 4 1/2" nominal diameter seamless pipe internally overlaid with Alloy 625. This pipe corresponds to a 90° curve. The overlaid pipe was heat treated before and after bending. The final quenching and tempering heat treatment was conducted to meet API 5L X70 properties.
113
VIEW
ML00132 / May.2018
Seamless Pipe Overlaid with Alloy 625
M - LAS / Ni AlloyP - Seamless PipeAp - Oil and GasCd - Welding
Cm - Aspect Before AnalysisDf - Welded Joint
Summary of the welding conditions and qualification test results. NON QUALIFIED WPS. The individual parameters for each welding position are presented in the legend of each macrography, that also presents the amount of beads.
117
VIEW
ML00118 / Jan.2018
Non qualified GMAW of Aluminum Plates
M - Aluminum Magnesium ManganeseP - Welded Testpiece for QualificationAp - ShipCd - Non qualified
Cm - WPS summaryDf - Welded Joint
Macrography of the tubular forging, butt welded using a LAS filler metal, and overlaid using Inconel 625 filler metal. The micrographic characterization was conducted for the HAZ of the overlay and for the HAZ of the butt weld, at the root position (with several welding cycles) and at the face.
608
VIEW
ML00102 / May.2018
AISI 4130 Forging Welded and Overlaid
M - Low Alloy SteelP - CladdingAp - Oil and GasCd - Welding
Cm - Electrolytically Etched MacroDf - Welded Joint
Detail of the welded joint between the 316 tubing (left side) and the nitronic fitting (right side). The through wall cracking is transverse to the line, in the fitting, 10 mm far from the weld, where the fitting was slightly bent to be assembled (cold bent).
65
VIEW
ML00095 / Sep.2017
MIC of a Riser Control Line
M - Austenitic Stainless SteelP - Fabrication WeldAp - Oil and GasCd - Brittle Behavior
Cm - Aspect Before AnalysisDf - Welded Joint

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ML00118 — Non qualified GMAW of Aluminum PlatesM - Aluminum Magnesium ManganeseP - Welded Testpiece for QualificationAp - ShipCd - Non qualified
Macrography of the flat position welded joint. It was welded in three passes, with the following parameters. Root pass - 157A, 21V, 146mm/s (wire speed), 3.2 mm/s (welding speed), 1090 J/mm. Second pass - 161A, 21V, 146mm/s (wire speed), 4.2 mm/s (welding speed), 833 J/mm. Third pass - 155A, 21V, 146mm/s (wire speed), 5.1 mm/s (welding speed), 664 J/mm.
48
VIEW
ML00118 / Jan.2018
Non qualified GMAW of Aluminum Plates
M - Aluminum Magnesium ManganeseP - Welded Testpiece for QualificationAp - ShipCd - Non qualified
Cm - Keller Etched MacroDf - Flat Position
Macrographic detail of the flat position welded joint, showing the three passes. The large extension of the heat affected zone in the root reveals the too high imposed energy, melting out of the root gap. The shining spots are pores.
42
VIEW
ML00118 / Jan.2018
Non qualified GMAW of Aluminum Plates
M - Aluminum Magnesium ManganeseP - Welded Testpiece for QualificationAp - ShipCd - Non qualified
Cm - Keller Etched MacroDf - Flat Position
Macrography of the horizontal position joint. It was welded in three passes, and one additional pass from the root. Root pass - 153A, 20V, 156mm/s (wire speed), 3.5 mm/s (welding speed), 933 J/mm. Second pass - 162A, 20V, 156mm/s (wire speed), 5.8 mm/s (welding speed), 592 J/mm. Third pass - 155A, 19V, 156mm/s (wire speed), 5.9 mm/s (welding speed), 523 J/mm. Additional at the root - 161A, 23V, 187mm/s (wire speed), 8.5mm/s (welding speed), 467J/mm.
47
VIEW
ML00118 / Jan.2018
Non qualified GMAW of Aluminum Plates
M - Aluminum Magnesium ManganeseP - Welded Testpiece for QualificationAp - ShipCd - Non qualified
Cm - Keller Etched MacroDf - Horizontal Position
Macrographic detail of the horizontal position welded joint, showing the three passes welded from one side and the fourth pass welded after removing the ceramic backing. Big pores and liquation were identified.
40
VIEW
ML00118 / Jan.2018
Non qualified GMAW of Aluminum Plates
M - Aluminum Magnesium ManganeseP - Welded Testpiece for QualificationAp - ShipCd - Non qualified
Cm - Keller Etched MacroDf - Horizontal Position
Macrography of the vertical up position welded joint. It was welded in three passes, with the following parameters. Root pass - 115A, 21V, 162mm/s (wire speed), 2.6 mm/s (welding speed), 1090 J/mm. Second pass - 143A, 21V, 162mm/s (wire speed), 5.5 mm/s (welding speed), 594 J/mm. Third pass - 144A, 21V, 162mm/s (wire speed), 6.1 mm/s (welding speed), 979 J/mm.
39
VIEW
ML00118 / Jan.2018
Non qualified GMAW of Aluminum Plates
M - Aluminum Magnesium ManganeseP - Welded Testpiece for QualificationAp - ShipCd - Non qualified
Cm - Keller Etched MacroDf - Vertical Up Position

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