... stainless steel pipe2). Country of Origin: China 3). Grade: 201,202,304,316L,430,etc 4). Standard: Standard JIS, AISI, ASTM, ... test, crystal rot test, heat treatment, NDT8). 316 stainless steel feature:316 is an improved version of 304316 is added with ... stainless steel pipe with perfect surface settlement, strict tolerance, high quality, most reasonable price.2). Material: 201,202,301,304,310S,316, ...