... steel pipe 2). Country of Origin: China 3). Grade: 201,202,304,316L,430,etc Abstract:1). Product Name: stainless ... water pressure test, crystal rot test, heat treatment, NDTSpecification:1). Model No.: 201201 stainless steel pipe with perfect surface settlement, strict ... tolerance, high quality, most reasonable price.2). Material: 201, 202, 301, 304, 304L, 316, 316L ,321,317L,310S ...