ＮＫＫ开发成功薄壁焊管，由于采取了先将带钢加热后以高功率激光焊接的新工艺，强度达无缝钢管水平。无缝钢管强度较高，但由于采用穿孔轧制工艺生产，生产薄壁管较困难。管线用钢管作为大用户既要求强度高、又希易焊的薄壁管。故这样将有利于煤气输送等管线用管市场的扩... NKK successfully developed thin-walled welded pipe, due to take the first strip heated to high-power laser welding new technology, the strength of seamless steel pipe level. Seamless steel pipe with high strength, but due to the use of perforated rolling production, production of thin-walled tube more difficult. Pipeline steel pipe as a large user both require high strength, but also easy to thin-walled tube. Therefore, it will be conducive to gas pipeline and other pipeline market expansion ...