... Size:1/2"-24",24''-80'' Thickness:SCH10-XXS Material:Carbon Steel,Stainless Steel Flanges -ANSI B16.5 Welding Neck size ... 1/2" to 24" ASME B16.524"to 80" ASME ... PN25,PN40/ Class A, B, C, D, EstandardASME B16.5, ASME B16.47, ASME B16.36,DIN 86341-2000, ... as the requirement of customer Flanges -ANSI B16.5 Welding Neck