Chongqing Exhibition kun wholesale various model specifications, material flange. Socket flange, welded flange, flange cover, upright tube flange, threaded flange, welded flange, weld rigid pipe flanges, loose flanges, carbon steel flanges, stainless steel flanges. Specification DN15-1200 has, special specifications can be customized. According to its specifications into the pipeline working pressure: 0.25Mpa, 0.6Mpa, 1.0Mpa, 1.6Mpa, 2.5MPa five kinds. Tel: 15123295084 [Zhang] flanges which of these categories? What are the commonly used flange? [Answer]: flange with steel and cast iron two categories, round, square, ingot-shaped variety of shapes, widely used in steel round flange. The most common flange are: (1) threaded flange: generally cast iron flanges, and pipe connection of its threaded connection, mainly for the galvanized steel with a flanged accessory. Installation, in processed flax wrapped around the pipe threads lead wipe oil, internally threaded flange tighten. (2) Flat welding steel flanges: Is the professional pipe installation project the most common type of flanges. Flange and the pipe connection, using electrically welded. According to its specifications into the pipeline working pressure: 0.25Mpa, 0.6Mpa, 1.0Mpa, 1.6Mpa, 2.5MPa five kinds. Mostly flat welding steel flanges with smooth sealing surface, a few rigor demanding pipeline (such as ammonia pipe, ammonia valves, etc.) using the bump-type sealing surface. Smooth sealing surface machining accuracy and should have 2-4 ring seal groove (commonly known as the waterline). In addition to the above two flanges, the Shang Youping Loose welding steel flanges, welded steel flanges, crimping loose flanges etc.. Flange and pipe assembly, ensure that flange and the vertical centerline, and should be the first spot in the assembly, then flange vertical scale test, it does not exceed a vertical deviation of ± 1 ~ ± 2mm after the final welding. Tube end into the flange from the flange sealing surfaces should be 1.3 to 1.5 times the distance between the wall thickness to keep doing welding seams. These contents are based on actual student work gathered from the problems encountered, for reference, any questions please timely communication, correct me. Tel: 15123295084 [Zhang]