... spcial specification and special material products.The exact information about stainless steel Flange as fellows :Quality First,Customer Foremost!Production Details ... :Certification: ISO9001.Standard: AISI, ASTM,DIN,GB,JIS,EN,Etc.Grade:201,202,304 ... ,309S,310S,316,316L,321,430F,Etc.Size: 40mm-1500mm, Or As Your ...