1) OD: up to 5,500mm 2) Standard: ASME, ANSI, API, JIS, JPI, DIN, UNI, BS, AS ... -2008. Stainless Steel Flanges SpecificationASTM A 240,AI82DimensionANSI B 16.5GradeTP304,304L,304H,316, 3I6L,316H,317,317L ... 4" to 48" Carbon Steel Flanges SpecificationASTM A 105DimensionANSI B 16.5Grade RangeSORF, BLRF, SWRF, WNRF, SCREWED. ... 900, 1200, 1500,2500.Size1/4" to 48" asme b 16.47 carbon steel forged flange