Flanges -ANSI B16.5 Welding Neck Size:1/2"-24",24''-80'' ... -XXS Material:Carbon Steel,Stainless Steel Flanges -ANSI B16.5 Welding Neck size 1/2" to 24" ASME B16 ... PN25,PN40/ Class A, B, C, D, EstandardASME B16.5, ASME B16.47, ASME B16.36,DIN 86341-2000, ... A182 F12,F11,F22,F5,F9,F91,F1ECT)qualificationISO9001:2008 Quality Mangement System Certificate,ISO 14001 Environment Mangement System Certificate ...