The pressure API 5L Large Diameter Spiral Steel Pipe

　　The pressure API 5L Large Diameter Spiral Steel Pipe involved in all walks of life, it is the basic requirement of "safety and service", in order to use safety, security must be used, use also relates to economic problems, namely investment, long service life, which is related to many factors. The material is the basis of the project, we must first understand the special requirements of pressure piping metal materials. In addition to withstand the pressure of the pipeline, due to the different environment, temperature and media work, but also bear a special test.