3Alan G, Glover etc: High-strength steel becomes standard on Alberta gas system,Oil & Gas Journal, 1999,97(1).
4Jeremy C, Price etc:Welding needs specified for X-80 offshore line pipe,Oil & Gas Journal, 1993,91(51).
5Frank J, Barbaro etc: Quality and productivity improvements in the field welding of high strength thin walled pipelines , International pipeline conference, 1998, vol 2.
6BY D V, Dorling etc : Gas metal arc welding used on mainline 80 ksi pipeline in Canada.Welding Journal. 1992.71 ( 5 ).
7Chaudhari V, etc. :German gas pipeline first to use new generation line pipe,Oil & Gas Journal ,1995,93(1).
8Takahashi, Aklhiko, Ogawa, et al. Influence of softened heat-affect zone on stress oriented hydrogen induced cracking of a high strength line pipe steel[J]. ISU International, 1995, 35(10):1 190-1 195.
9Alan G Glover. High-strength steel becomes standard on Alberta gas system[J]. Oil & Gas Journal, 1999,97(1):44-50.
10Jeremy C Price. Welding needs specified for X-80 offshore line pipe[J].Oil & Gas Journal,1993,91(51):95-100.
