... .5 Stainless Steel 304L,316L ect. Standard Chinese Flange Used in Pipeline,Transport ISO9001-2008. Stainless Steel Flanges SpecificationASTM ... A 240,AI82DimensionANSI B 16.5GradeTP304,304L,304H,316, 3I6L,316H,317,317L, 321 ... /4" to 48" Alloy Steel Flanges SpecificationASTM A 350DimensionANSIB 16.5GradeLF2,F1,F5,F9,F11,F22RangeSORF, BLRF, SWRF, WNRF ...