Metal spiral wound gasket installation and purchase requirements
2020-07-11 15:14:04
Cautions for installation and use 1. The winding part of the gasket must be interposed between the flange sealing surfaces. The width of the winding part must not be arbitrarily widened. This will inevitably affect the pressing force of the bolt and thus affect the sealing performance of the gasket.
2, the basic type of gasket is best not to use on the concave and convex surface flange, this is because the basic type of gasket in the axial force of the flange under pressure, the gasket inner ring welding point is easy to open welding, resulting in gasket failure .
3, in the high temperature, cold or hot and cold frequent alternating, vibration, strong corrosive media and Other harsh working conditions, flanges for flat flange and convex flange is best to install the inner ring of reasonable material.
4, can not use low material gasket to replace high material gasket. To avoid material corrosion or other reasons caused gasket failure.
Option 1. Select the gasket according to the operating conditions and flange sealing surface type.
2. It is best to use the products of manufacturing companies that have a sound and effective quality management system to operate and have the manufacturing licenses for special equipment (pressure piping components) and valid type test reports.
3, compression rate, rebound rate and sealing performance are important performance indicators of the gasket, in general, under the premise of meeting the compression rate requirements, the higher the rebound rate the better; and in meeting the requirements of the rebound rate standard Under the premise, the test value of the compression ratio is also larger. Choose a product that has good sealing performance, moderate compression ratio, and a high rebound rate.
4, the surface of the gasket body does not allow the impact of the sealing performance of the scars, voids, uneven and rust defects. The nonmetallic strip on the surface of the gasket main body should be evenly and appropriately higher than the metal strip. The interlayer texture should be clear, but the metal strip should not be exposed. The distance between solder joints of metal spiral wound gaskets should be uniform and there should be no defects such as unfused or over-melted. The surface of the reinforcing ring should not have defects such as burrs, unevenness, rust, etc. The distance between the upper and lower sealing surfaces of the gasket main body and the upper and lower surfaces of the reinforcing ring should be equal. The reinforcing ring and the gasket main body should be tightly fixed and cannot be loosened; the outer reinforcing ring is The gasket body should be positioned and properly loosened.
Wound gasket
2, the basic type of gasket is best not to use on the concave and convex surface flange, this is because the basic type of gasket in the axial force of the flange under pressure, the gasket inner ring welding point is easy to open welding, resulting in gasket failure .
3, in the high temperature, cold or hot and cold frequent alternating, vibration, strong corrosive media and Other harsh working conditions, flanges for flat flange and convex flange is best to install the inner ring of reasonable material.
4, can not use low material gasket to replace high material gasket. To avoid material corrosion or other reasons caused gasket failure.
Option 1. Select the gasket according to the operating conditions and flange sealing surface type.
2. It is best to use the products of manufacturing companies that have a sound and effective quality management system to operate and have the manufacturing licenses for special equipment (pressure piping components) and valid type test reports.
3, compression rate, rebound rate and sealing performance are important performance indicators of the gasket, in general, under the premise of meeting the compression rate requirements, the higher the rebound rate the better; and in meeting the requirements of the rebound rate standard Under the premise, the test value of the compression ratio is also larger. Choose a product that has good sealing performance, moderate compression ratio, and a high rebound rate.
4, the surface of the gasket body does not allow the impact of the sealing performance of the scars, voids, uneven and rust defects. The nonmetallic strip on the surface of the gasket main body should be evenly and appropriately higher than the metal strip. The interlayer texture should be clear, but the metal strip should not be exposed. The distance between solder joints of metal spiral wound gaskets should be uniform and there should be no defects such as unfused or over-melted. The surface of the reinforcing ring should not have defects such as burrs, unevenness, rust, etc. The distance between the upper and lower sealing surfaces of the gasket main body and the upper and lower surfaces of the reinforcing ring should be equal. The reinforcing ring and the gasket main body should be tightly fixed and cannot be loosened; the outer reinforcing ring is The gasket body should be positioned and properly loosened.
Wound gasket
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