What are the regulations for the installation of sealing gaskets

When the gasket is installed, what are the installation regulations? As a gasket manufacturer, let the editor take everyone to understand together!

1. The sealing gasket and the raised surface of the flange should be clean and tidy, and there should be no other problems such as scratches and stains that endanger the sealing performance of the connection.

2. The diameter of the sealing gasket should be smaller than the outer surface of the flange, and the inner diameter of the sealing gasket should be slightly larger than the inner diameter of the pipe. The difference between the two inner diameters is generally twice the thickness of the sealing gasket to ensure that after compression, the sealing The inner edge of the gasket will not protrude into the vessel or pipeline, so as not to hinder the fluidity of the liquid in the vessel or pipeline.

3. The pre-tightening force of the gasket should not exceed the design requirements, so as not to shrink the gasket too much and lose its resilience.

4. When the sealing gasket is pressed tightly, it is recommended to use a torque wrench. For large and medium-sized anchor bolts and high-strength bolts, it is recommended to use a hydraulic tightener for stainless steel winding pads. The tightening torque should be calculated according to the given sealing gasket compression, and the size of the steam pressure of the tightener of the hydraulic machine should also be determined according to the calculation.

5. When installing the sealing gasket, the nuts should be tightened in sequence. But it cannot be screwed once to reach the design value. Generally, it should be circulated at least 2 to 3 times to facilitate the stress distribution of the gasket.

6. For pressure pipes and pipes with flammable, flammable and explosive substances, safety tools should be used when modifying the gasket to prevent flames and fire accidents caused by special tools colliding with flanges or anchor bolts or an explosion.

7. If the pipeline leaks, it must be depressurized before replacing or adjusting the gasket, and it is forbidden to operate under pressure. When installing a sealing wound gasket that matches the protruding plan flange, care should be taken to ensure that the hydraulic seal is in the same boat as the pipeline. Generally, the outer lifting ring is used to contact the inner circle upper face of the anchor bolt for precise positioning, and the shaft is not allowed. force installation.