we are manufacturer of stainless steel flange and low alloy flange, the type of flanges: WELDING NECK, SLIP ON , SOCKET WELDING ,BLIND ,PLATE, THREAD FLANGE , THE Main materials are A182 F304, F304L,F316,F316L, F321 ,316Ti, F5,F9,F11,F22,A350 CL2 AND F51,website: http://www.stainless-flange.com