... size, dn15-1200 type, slip on, plate, welding neck, blind certificate: iso9001-2000 Welding flanges1) Sizes: DN15 to DN1200, 1/2 inch ... , SABS, EN1092, UNI, GOST4) Types: plate, slip on, welding neck, blind, thread, socket weld flange5) Process: free forging, plate cutting, heat treat ... , please don't hesitate to contact me for flange price. WELDING FLANGE