关键词: X80, 热轧板卷, 埋弧焊管, 厚壁, 高压输送

Abstract: X80-steel grade submerged-arc welded steel pipes are the main products for the trunk lines of major domestic and foreign pipeline projects, such as the 2nd and 3rd West - East Gas Pipelines, and the Sino - Russian oil (east) pipeline. the main product specifications are: spiral submerged arc welded pipe Ф1219mm×18. 4mm, Ф1219mm×22. 0mm, Ф1422mm× 21. 4mm, submerged arc welded steel pipe Ф1219mm×18. 4-37. 9mm, Ф1422mm×21. 4-33. 8mm. X80 steel grade thick-walled hot rolled coil adopts low C, high Mn, Nb-Mo compound addition alloy design system to realize the low cost, industrialization and mass application of thick-walled X80 hot rolled coil steel. Through the low-stress molding technology, X80 pipeline steel special welding technology and supporting the development of welding and other series of innovative technologies, developed X80 steel submerged arc welded pipe performance indicators are in line with pipeline construction standards. At present, the cumulative sales of X80 steel spiral submerged arc welding pipe 142 million tons, straight seam submerged arc welded pipe 68 million tons, the field application effect is good.