Metal hose joint is divided into threaded, flange disc type, fast type. Shared by carbon steel pipe nipple supplier.
Metal hose joint: the role of the joint is to connect the mesh sleeve and bellows into one, at the same time, the joint is the metal hose and metal hose or other pipe fittings, equipment connected parts. It ensures that the medium works normally in the pipeline system. The joint is usually made of the same material as bellows and mesh, mainly stainless steel. In order to reduce production costs, some of the larger diameter of the metal hose in the transmission of corrosive medium is not strong or non-corrosive, the joint can be made of carbon steel; For corrosive medium working conditions of the metal hose joints, if the design to take appropriate measures to avoid contact with the medium, can also be made of carbon steel. The joint structure is generally divided into three categories: spiral type, flange disc type and fast type:
1, threaded: diameter of 50 mm or less of the metal Hose Nipples, in the case of higher working pressure, most of the screw type, when the screw thread, the two joints on the inner and outer taper surface closely cooperate, achieve sealing. Cone Angle is 60 degrees commonly, also useful 74 degrees. The structure has good airtightness, but the installation must ensure the concentricity of the two butt pieces. In order to solve the problems of repeatedly disassembling, assembling and not being concentric, the joint can also be designed into the conical surface and ball head.
2, flange disc type: diameter of 25 mm or more of the metal hose joints, under the condition of general working pressure, to flange disc type, it in the form of tenon groove to seal. The sleeve flange, which can rotate in radial direction or slide in axial direction, connects the two bodies under the action of tightening bolt tension. The sealing performance of the structure is good, but it is difficult to process and the sealing surface is easy to be damaged. In special occasions requiring quick discharge, the hole through which the fastening bolt passes can be cut open to make a quick discharge flange.
3, fast type: diameter of 100 mm or less of all kinds of metal seamless steel pipes Hose Nipples, in the requirements of rapid loading and unloading of the use of conditions, the general use of fast type. It is usually made of fluoroplastic or special rubber "O" seal ring seal. When the handle is moved at a certain Angle, the claw fingers equivalent to multiple threads are locked; The more tightly the O ring is pressed, the better its sealing performance. The structure is suitable for fire, battlefield and other occasions where quick loading and unloading are necessary. In a matter of seconds, a set of joints can be connected or disassembled without any special tools.
