1.Stainless steel seamless pipes 2.Standard :JIS, AISI, ASTM, GB, DIN, EN 3. ... , 321, 317L We are specilized in supplying those stainless steel seamless pipes in China. The main markets are South Amercia, Middle ... inspection, such as SGS, LIoydis, DNV and so. Stainless Steel Seamless Pipes