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03532 HYDROGEN INDUCED CRACKING FAILURE OF SA 516 GRADE 70 STEEL IN NEAR NEUTRAL TO HIGH PH SOLUTION: PART 1 FIELD INVESTIGATION

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Product Number: 51300-03532-SG
ISBN: 03532 2003 CP
Author: T.G. MARTIN, G. WILKEN
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During a major turn around at a sour gas treating facility, routine vessel entry revealed that a high- pressure amine contactor was apparently cracked. Follow up detailed ultrasonic inspection revealed severe cracking of the vessel, which was removed from service. A detailed failure investigation showed that the vessel had experienced severe hydrogen induced cracking ( HIC ), the cause of this cracking has been traced to high hydrogen fluxes brought on by a combination of operating conditions, poor metallurgy for the service and a tendency for the alkanolamine to charge hydrogen at very high acid gas Ioadings. Key Words: Hydrogen induced cracking, alkanolamines, sulfinoI-M, hydrogen permeation, sour service, pressure vessels
During a major turn around at a sour gas treating facility, routine vessel entry revealed that a high- pressure amine contactor was apparently cracked. Follow up detailed ultrasonic inspection revealed severe cracking of the vessel, which was removed from service. A detailed failure investigation showed that the vessel had experienced severe hydrogen induced cracking ( HIC ), the cause of this cracking has been traced to high hydrogen fluxes brought on by a combination of operating conditions, poor metallurgy for the service and a tendency for the alkanolamine to charge hydrogen at very high acid gas Ioadings. Key Words: Hydrogen induced cracking, alkanolamines, sulfinoI-M, hydrogen permeation, sour service, pressure vessels
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