How to prevent the metal from sticking to the gasket?
The gasket sealing surface than the flange diameter should be small, the gasket diameter should be slightly larger than the inner diameter of the pipe diameter, two difference 2 times the thickness of the gasket, to ensure that the gasket is compressed, not into the inner edge of a container or a pipe, in order to prevent the fluid flow in the vessel or pipe.
It is better to use torque wrench when sealing gasket is pressed. For large bolts and high strength bolts, it is better to use hydraulic tightening devices. The tightening torque shall be calculated by calculation according to the given gasket. The size of the hydraulic pressure of the hydraulic tightening device shall also be determined by calculation.5. When installing the gasket, tighten the nut in sequence. However, the design value should not be screwed once. Generally should be recycled at least 2~3 times so that the gasket can be evenly distributed.6, the flammable and explosive medium pressure vessel and piping, replacing gasket should be used to avoid security tools, tool and flange bolts or collide, sparks, causing a fire or explosion accident.
Gasket and flange sealing surface should be cleaned, must not have any influence on the sealing performance of scratches, spots and other defects exist.
