Study of verification and validation of standard welding procedure specifications guidelines for API 5L X-70 grade line pipe welding
Author(s): Qazi H. A. A.
Affilation(s): Crescent Steel and Allied Products Ltd., Latifabad, Hyderabad, Sindh, Pakistan
*Corresponding Author’s Address: [email protected]
Issue: Volume 4; Issue 2 (2017)
Dates:
Paper received: September 29, 2017
The final version of the paper received: November 25, 2017
Paper accepted online: November 28, 2017
Citation:
Qazi H. A. A. Study of verification and validation of standard welding procedure specifications guidelines for API 5L X-70 grade line pipe welding / H. A. A. Qazi // Journal of Engineering Sciences. — Sumy : Sumy State University, 2017. — Volume 4, Issue 2. — P. B11-B14.
DOI: 10.21272/jes.2017.4(2).b11
Research Area: Investigation of Operating Processes in Machines and Devices
Abstract: Verification and validation of welding procedure specifications for X-70 grade line pipe welding was performed as per clause 8.2, Annexure B and D of API 5L, 45th Edition to check weld integrity in its future application conditions. Hot rolled coils were imported from China, de-coiling, strip edge milling, three roller bending to from pipe, inside and outside submerged arc welding of pipe, online ultrasonic testing of weld, HAZ and pipe body, cutting at fixed random length of pipe, visual inspection of pipe, Fluoroscopic inspection of pipe, welding procedure qualification test pieces marking at weld portion of the pipe, tensile testing, guided bend testing, CVN Impact testing were performed. Detailed study was conducted to explore possible explanations and variation in mechanical properties, WPS is examined and qualified as per API 5L 45th Edition.
Keywords: welding procedure specification WPS, welding procedure qualification record WPQR, submerged arc welding SAW, american petroleum institute API, american society for testing materials ASTM, tensile test, guided bend test, charpy V-notch impact test.
References:
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