... : From1/8" to 64" 3,Standard: ANSI,DIN,BS etc. Integral flange Production standard: GB/T9112~9124-2000 JB/T81-94 ... EN1092.1 Material: Carbon steel: 20# Q235 A234 WPBTypes: Welding Neck Flanges, Slip on Flanges, Threaded Flanges, Socket Welding Flanges, Blind ... , Orifice Flanges, Lap Joint Flanges, Ring Joint Flanges, Long Welding Neck Flanges, Figure 8 Blanks Stainless steel: 304 321 304L 316 ...