Expansion joint selection goal is to choose a reasonable expansion joint type and arrangement, make its biggest compensation ability, or when a certain compensation ability, choose the least expansion joint, at the same time meet the requirements of the stress of the support designers should according to the network, the direction of the flow medium, working pressure, working conditions, such as temperature, pipe diameter, pipe expansion amount, determine the paragraphs using expansion joint type, specification and quantity, to ensure the reasonable design of pipe network, safe, reliable and economic, the division of typical section in the pipe network in the design of piping systems, due to restricted by various factors, the pipeline network and the direction of the support system is often quite complex piping design A piping arrangement should be orderly, horizontal flat vertical, concentrated rows, easy to support no matter how complex, a network according to the pipeline arrangement, designers can be fixed bracket, times fixed stent pipeline section reasonably, divided into straight section of the above mentioned, Z section, section, section plane form, space L shaped section typical section

 

Straight pipe expansion joint, as shown in the selection of points is on both ends of pipeline to fixed bracket, pipeline compensation amount is not very big adopts universal expansion joint, under the condition of fixed bracket, as shown in the both ends of pipeline to pipe offsets as shown in figure 1 (a) can't satisfy the straight pipe longer cases using compound arrange ushering axial type expansion joint, as shown in both ends of pipeline, for fixed bracket, need expansion joint absorption pressure on the straight pipe pressure balance type expansion joint, as shown