... ect. Standard Chinese Flange Used in Pipeline,Transport ISO9001-2008. Stainless Steel Flanges SpecificationASTM A 240,AI82DimensionANSI B 16.5GradeTP304,304L,304H, ... , 1200, 1500,2500.Size1/4" to 48" Carbon Steel Flanges SpecificationASTM A 105DimensionANSI B 16.5Grade RangeSORF, BLRF, SWRF, WNRF, SCREWED.Class150,300 ... , 600, 900, 1200, 1500,2500.Size1/4" to 48" asme b 16.47 carbon steel forged flange