PETRO FLANGE LLC. is a manufacturer & wholesale distributor of carbon steel / stainless flanges fittings in different variety: Sizes: 1/2"-72" Type: Weld Neck, Slip-On, Blind, Socket Weld, Lap Joint, Threaded, Etc. Standard: ANSI, ASME , MSS, API, DIN, JIS, BS. AWWA and GB Class: ...