Materials Failures in Sour Gas Service

Abstract

Abstract Three analyses of materials failures in sour gas service are reviewed. The failures include: stress-corrosion cracking of a duplex stainless steel wireline, sulfide stress-cracking of moderate hardness L-80 casing, and sulfide stress-cracking of two forged carbon steel, gathering system fittings. The failures demonstrate the significant effects of stress level, environmental aggressiveness and localized hard zones in promoting stress-corrosion cracking and sulfide stress-cracking.