Gasket installation requirements

2014-01-18


Gasket is for machinery, equipment , spare parts pipeline as long as the seal where fluid is used , the use of external , the seal material , the type of gasket that we already know , to tell you today ' gasketed mounting requirements :

1 , with the flange gasket sealing surfaces should be clean , without any impact on the performance of joint seals scratches, spots and other defects .

2 , the outer diameter of the gasket to be smaller than the outer sealing surface of the flange , the inner diameter of the gasket should be slightly larger than the pipe diameter, the inner diameter difference between the two generally take two times the thickness of the gasket in order to ensure that after compression, the gasket will not extend into the inner periphery of the pipe or vessel , container or pipe to avoid affecting the flow of fluid .

3 , gaskets preload should not exceed the design requirements , in order to avoid excessive compression gasket lose resilience .

4 , when the nbr gasket compression is best to use a torque wrench. Large bolts and bolt, preferably using a hydraulic tightening device . Tightening torque should be based on a given compression gasket by calculation , the oil pressure of the hydraulic tensioner size should be determined by calculation .

5 , when installing the gasket , the order should tighten the nut . Primary winding but not the design value is reached . Usually at least 2 to 3 times the cycle , so as to seal the gasket stress distribution.

6 , pressure vessels and piping of flammable , explosive media facelift gasket security tools should be used so as to avoid the tool flange or bolt collide, sparks , causing a fire or explosion.

7 , if the pipeline leaks , must replace or adjust antihypertensive treatment after installing gaskets, non -pressure operation.