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J Weld Join. 2014;32(5):431-436. Published online October 30, 2014.
DOI: https://doi.org/10.5781/JWJ.2014.32.5.1
- Evaluation of HIC/SSCC Resistance for API-X70 Pipe Manufactured by JCO Bending Process and SA Welding
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Hoi-Soo Ryoo*, Hee Jin Kim*, Dong-Eon Lee**
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- Corresponding author: Hoi-Soo Ryoo ,Email: hsryoo@kitech.re.kr
- Abstract
- This study aims at manufacturing SA welded API-X70 line-pipe with sour gas resistance. A pipe was manufactured by JCO bending process and SA welding using the API-X70 plate guaranteed HIC resistance. SA welded pipe was expanded in order to reduce the residual stress. The evaluation of a pipe for resistance to HIC and SSCC were performed by the RS D 0004 and RS D 0005 standards. For verification that a pipe has acceptable resistance to HIC, fullscale test was carried out. Results showed no cracking for the HIC and SSCC.
Keywords :API-X70, JCO(J-ring, C-ring, O-ring) bending, SAW(submerged arc welding), HIC(hydrogen induced cracking), SSCC(sulfide stress corrosion cracking), Fullscale HIC test
