How Is Steel Pipe Graded?
ASTM Standards Steel pipe is graded based on the ASTM (American Society for Testing Materials) standards and ASME standards. ASTM International is the company that issues the standards for most of the steel pipe manufactured and ASME generally issues standards for pressure bearing pipes. ASTM is a large organization that develops standards for different materials which are manufactured and generally used in construction or industry. The organization is what is called a voluntary standards development company and they are independent of the manufacturers. Standards for each type of pipe can be downloaded or purchased in print from ASTM and several other website which host their documentation. Manufacture Steel pipe is manufactured in many different ways including seamless pipe, welded pipe, cast pipe. In addition, there are subcategories for each type of pipe. For instance there is single welded pipe, or diagonally (continuously welded pipes) made by welding the edges pf a single strip
