LSAW Steel Pipe

 1. Spiral submerged arc welded steel pipe (SSAW) and longitudinal submerged arc welded steel pipe (LSAW) In the 1950s and 1960s, spiral steel pipes were widely used in oil and gas pipelines. In the 1970s and 1980s, they were severely challenged by longitudinal submerged arc welded steel pipes (LSAW steel pipe) and ERW steel pipes. So far, spiral steel pipes are basically no longer used in oil and gas pipelines in the world. , Many major international oil companies and pipeline companies have not allowed the use of spiral submerged arc welded steel pipes for oil and gas pipelines. This is because the development of the pipeline industry has higher and higher requirements for the reliability of steel pipes, and the spiral steel pipe is difficult to meet the requirements of objective development due to the insurmountable defects of its manufacture. Compared with LSAW steel pipes, spiral pipes have certain deficiencies in quality. Here are seven items for your reference. (1) The manuf...