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The line pipes with large diameter, thick wall and high steel grade are preferred to meet the requirements of extremely high gas transmission rate (380 × 108 m3/a) in the Sino–Russian eastern route project. In this paper, the technical standards of line pipes at home and abroad were comparatively analyzed after the research and formulation process of technical specifications of X80 line pipes (OD...
High-grade (API 5L X80) and large-diameter (OD 1422 mm) line pipes are used in the Sino–Russian eastern route gas pipeline project for high pressure (12 MPa) transmission, and this can significantly increase the transmission capacity and meet China's energy strategic demand. With the increase of steel grade, transmission pressure, pipe diameter and design coefficient, however, ductile crack of line...
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