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03531 TECHNICAL REVIEW ON THE WELDING CONDITION OF STEEL PIPES FOR SULFIDE STRESS CRACKING RESISTANCE

Picture for 03531 TECHNICAL REVIEW ON THE WELD1NG CONDITION
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Product Number: 51300-03531-SG
ISBN: 03531 2003 CP
Author: H.I. Lee, C.H. Lee, K.K. Baek
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The sulfide stress cracking (SSC) resistance of structural materials is one of the critical concerns for the operators, material designers, and fabricators of oil-field equipment, especially'treating sour gas (H2S) containing fluids. As far as its fabricators concerned, the systematic care of welding technique should be taken to obtain comparable SSC resistance of their weldment to that of its base material. In this respect, every different type of welding joint design for this use should be verified to be SSC-proof with relevant test procedures. In this study, the welding conditions to secure a proper SSC resistance of steel pipe's weldments were reviewed on the actual welding procedure qualification records (WPQR) of an offshore project. The guideline of welding process, heat input, and consumable for Y.S. 65 ksi class steel pipe material was proposed in terms of the NACE criteria for SSC resistance. Keywords: sulfide stress cracking, sour gas, welding process, heat input, consumable, steel pipe, WPQR, Y.S. 65 ksi
The sulfide stress cracking (SSC) resistance of structural materials is one of the critical concerns for the operators, material designers, and fabricators of oil-field equipment, especially'treating sour gas (H2S) containing fluids. As far as its fabricators concerned, the systematic care of welding technique should be taken to obtain comparable SSC resistance of their weldment to that of its base material. In this respect, every different type of welding joint design for this use should be verified to be SSC-proof with relevant test procedures. In this study, the welding conditions to secure a proper SSC resistance of steel pipe's weldments were reviewed on the actual welding procedure qualification records (WPQR) of an offshore project. The guideline of welding process, heat input, and consumable for Y.S. 65 ksi class steel pipe material was proposed in terms of the NACE criteria for SSC resistance. Keywords: sulfide stress cracking, sour gas, welding process, heat input, consumable, steel pipe, WPQR, Y.S. 65 ksi
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Picture for Modeling and Experimental Insights of Sulfide Stress Cracking Corrosion Mechanism
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Modeling and Experimental Insights of Sulfide Stress Cracking Corrosion Mechanism

Product Number: 51317--9328-SG
ISBN: 9328 2017 CP
Author: Daniella Sales
Publication Date: 2017
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A model was built that describes stress field and hydrogen activity at the direct vicinity of a crack tip. A second model was based on the cohesive zone simulates the kinetic of a crack growth. Experiments using hydrogen permeation under stress on flat un-notched & notched specimens yielded data comparable to the simulations.
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