... or low temperature conditions.SizeWeld neck flange: 1/2"~100" DN10~DN4000PressureAmerican Series: CLASS 150, CLASS ... 900, CLASS 1500, CLASS 2500 European Series: PN 2.5, PN 6, PN 10, PN 16, PN 25 ... : A105Alloy steel: A182 F 1-F 2-F 5-F 9-F 10-F 91-F ... H (O-Ring Groove)Industries ServedElectrical power, petroleum, natural gas, chemical, shipbuilding, heating, papermaking, metallurgy Packingwooden case, ...