The use of spiral pipe

　　In recent years, many foreign pipeline design companies in the specification clearly states: oil, gas pipeline in a certain size range prohibit the use of spiral pipe. China and foreign pipeline design companies in oil and gas pipeline design, all or part of the use of straight seam submerged arc welded pipe. Shaanxi-Beijing gas pipeline, for example, in the desert areas, such as river crossing lots difficult to repair lots, densely populated areas and other high security requirements of the lot are used straight seam submerged arc welded pipe.