... steel: A105Alloy steel: A182 F 1-F 2-F 5-F 9-F 10-F 91-F 92-F 122-F 911-F 11-F 12-F 21-F 22 Stainless steel: A182 304 ... L 5-L 6-L 7-L 8 High performance steel: A694 F 42-F 46-F 48-F 50-F 52-F 56-F 60-F 65-F 70Low ... WPHY 42-46-52-60-65-70 Flange StandardsASME B16.5-2009 ASME B16.47-2006API605-1988MSS SP 44-2006CSA ... CLASS 900, CLASS 1500, CLASS 2500 European Series: PN 2.5, PN 6, PN 10, PN 16, PN 25, PN ...