Limit expansion joint, how to choose materials reasonably?

Limit expansion joint, how to choose materials reasonably?
Limit expansion joint is suitable for connection with flange on one side and welding with pipeline on the other side. When installing, adjust the installation length of both ends of the product and pipeline or flange, tighten the gland bolts diagonally and evenly in turn, and then adjust the limit nut so that the pipeline can expand freely within the expansion range and lock the expansion amount to ensure the safe operation of the pipeline Limit expansion joint, how to choose the material reasonably?
 
Limit expansion joint should be checked before installation for its type, specification and pipeline configuration, which must meet the design requirements. Both sides are connected with flanges. When installing, adjust the length of the connection between the two ends of the product and the flange, tighten the gland bolts diagonally and evenly in turn, and then adjust the limit nuts so that the pipeline can expand and contract freely within the expansion range and lock the expansion volume to ensure the safe operation of the pipeline. The installation of the limit telescope should meet the following requirements: When the limit telescope is installed horizontally, the vertical wall should be placed horizontally and the parallel arm should be the same as the slope of the pipe. When installed vertically, no hole shall be cut in the bend to install the air release pipe and drainage pipe. The pre-deflection of the sliding pipe support at the expander should be in accordance with the design drawings. Material can be selected according to user requirements: The main material of flange type expansion joint is Q235, and the sealing material is corrosion resistant rubber ring, the advantages of which are simple structure, easy installation, convenient maintenance, etc. It is widely used in water supply, drainage, circulating water, waterworks, water pipeline, etc.
 
1、PN=0.25MPa, 0.6MPa, 1.6MPa and 2.5MPa, the structure length is the same as PN=1.0MPa.
 
2、When this pipeline expander is used with the pair of butterfly valve, it is recommended to use the standard type pipeline expander.
 
3、The structure length is the same as PN=0.25MPa, 0.6MPa, 1.6MPa and 2.5MPa for the extension type expander.
 
4、The flange size of the extension type expander is the same as that of the standard type expander.