The following is my summary bend manufacturing process and use: 1, the elbow is the more primitive production methods, tube filling sand, and then the tube is heated to simmer elbow. The method greater flexibility, but the efficiency is not high, greater energy wastage, high cost. Carbon steel heat bending bends less use of the method, but there are obvious advantages in the non-ferrous metal pipe and plastic pipe simmer bend. The process: filling sand, heating, bending, sand, slightly larger caliber should bend with heat and simmer. If the cold simmer production wall fold, oval phenomenon. 2, steel pipe material in the steel pipe pushing machine part to be bent to put on an induction loop pipe stuck in the head with a mechanical rotating arm, induction loop pass into the intermediate frequency current heating pipe, when the pipe temperature rises to a plastic state in the back of the steel pipe with a mechanical thrust forward, bending steel pipe bending part of the rapid cooling agent, such heating, edge forward, side bending, while cooling will continue to elbow bending. Heat simmer pipe is mainly used for circular steel structure of the building, tunnel support, curved roof beams, subway engineering, aluminum doors and windows, ceiling, package cylindrical skeleton, balcony handrails, shower door, rail lines, fitness equipment and other industries . I long production pipe, heat simmer pipe, large diameter hot simmer elbow Materials include: carbon steel (20 #, Q235, Q345, A105, A106, A516 Gr70, etc.), alloy steel (P11, F11 , P9, F9, 12Cr1MoV, 15CrMoG, 1Cr5Mo, etc.), stainless steel (304,316,321,316 L, 304L ,18-8, etc.), wall thickness grade: SCH5-XXS. Advanced process equipment, detection means complete, thereby ensuring the quality of the output, to allow customers to rest assured that at the time of purchase, the company promised: during the product warranty period, if the product is damaged, I will be compensated or repair, we obligation to assist the demand side, our field service personnel dispatched to meet the needs of the project.