Non-metallic expansion joint selection

Non-metallic expansion joint selection
The corrugation of the non-metallic expansion joint changes (whether the wave height and distance of the corrugation is uniformly deformed); whether there is any leakage in the weld between the pipe and the ring plate; whether there is any tensile displacement; whether the corrugated part produces pitting corrosion. Usually the project will generally purchase 2 more non-metallic expansion joints of the same type, in case they are damaged and can be replaced at one time, so as not to delay the normal operation of the heating pipes. Emergency replacement of non-metallic expansion joints pay attention to tighten the flanges on both sides, local pipeline first do not work. For non-metallic expansion joints used in heating pipes, choose to select axial external pressure type non-metallic expansion joints, such expansion joints have the advantages of drainage and easy insulation compared to other products. The selection of non-metallic expansion joints is the key, the later maintenance is also quite important, do not be careless.
The overall design of non-metallic expansion joints is based on many factors such as location, media composition (corrosion and scouring), temperature and pressure, installation requirements (installation length, connection method and size restrictions, etc.). After selecting the structure, the internal structure is designed according to the requirements of the compensation volume (relative position of each component, assembly method, etc.); if needed, the compensator scheme is established and the design of each part of the compensator is carried out, namely: the selection and size of the non-metallic expansion joint, the material and size of the metal components, the establishment of the structure of the dustproof heat insulation layer under different temperature levels, the choice of material and other design work.