... , ring joint flangeSize1/2”to 72”Pressure Rating150, 300, 600, 900, 1500, 2500 ClassStandardANSI B16.5, ASME B16.47A/B, DIN ... /JISMaterialCarbon Steel, Stainless Steel, Alloy Steel Types of faceRF, FF, RJ, Tongue&Groove Facing, etc.Surface treatmentblack painting, anti-rust varnish ...