1. API 5L (2012) Specification for Line Pipe
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4. Garland JG, Kirkwood PR (1974) The notch toughness of submerged arc weld metal in micro-alloyed structural steels, Sheffield
5. Baumann SF, Sawhill JM, Nakabayashi JM (1977) Wire and flux development for seam welding of HSLA line pipe, in Welding of line pipe steels