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07114 Stress Corrosion Cracking of Nitronic 60 STAB

Case Study: These lines, which are operating in about 500 Completion Risers Joints for more than 3 years exposed to a mixture of seawater, mud, oil and eventually products of acidification in the annular space , have shown good performance except for an unusual case of cracking of the Nitronic stab.

Product Number: 51300-07114-SG
ISBN: 07114 2007 CP
Author: Fatima Cunha and Annelise Zeemann
Publication Date: 2007
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The need for galling resistance in corrosion resistant stabs of hydraulic lines determined the selection of Nitronic 60 alloy as the material to be joined to 316 SS tubing by autogenous orbital GTAW process. These lines, which are operating in about 500 Completion Risers Joints for more than 3 years exposed to a mixture of seawater, mud, oil and eventually products of acidification in the annular space, have shown good performance except for an unusual case of cracking of the Nitronic stab.

Keywords: Nitronic 60, galling resistance, 316 steel, stress corrosion cracking, stagnant conditions

The need for galling resistance in corrosion resistant stabs of hydraulic lines determined the selection of Nitronic 60 alloy as the material to be joined to 316 SS tubing by autogenous orbital GTAW process. These lines, which are operating in about 500 Completion Risers Joints for more than 3 years exposed to a mixture of seawater, mud, oil and eventually products of acidification in the annular space, have shown good performance except for an unusual case of cracking of the Nitronic stab.

Keywords: Nitronic 60, galling resistance, 316 steel, stress corrosion cracking, stagnant conditions

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