PVC-U Spiral Silencing Pipe and Fittings mould manufacture and one-stop plastic service from DF-mold

PVC-U Spiral Silencing Pipe and Fittings compared to cast iron pipelarger coefficient of linear expansion, about 0.07mm / m * ℃, the drain standpipe and a longersuspension cross pipe ends should set a fixed support , and strictly preventthe linear expansion accumulation in the piping system, expansion joints shallbe provided between the fixed support , or in lead pipe rupture or leakage, orlead pipes produce significant bending.

(2)Setuprequirements for expansion joints

A: Whenthe story is less than or equal to 4m , the riser pipe should be located oneach floor an expansion joint ; when the story is greater than 4m, should bedetermined according to the design amount of stretching.

B:horizontal main pipe set horizontal expansion joints shall be determinedaccording to the design amount of stretching

C:Horizontal branch pipe section from confluence fittings to the straight piperiser more than 2m , the expansion joints should be set , but the maximum distancebetween expansion joints shall not exceed 4m; two expansion joints should bebetween a fixed support , in order to control the direction of pipelineexpansion .

D: Pipingexpansion volume should not exceed the maximum allowable amount of stretching expansionjoints

Setting expansion joints should be located close to the water at theconfluence of accessories, riser pipe expansion joints should be set close tothe branch office access , try to make the branch pipe connecting the riserdisplacements at a minimum , to ensure that the system is working properly.