1. Select the gasket according to the working conditions and the type of flange sealing surface.
2. Select products from production enterprises with sound and effective quality management systems, and preferably select products from enterprises that hold special equipment (pressure piping components) manufacturing licenses and valid type test reports.
3. The main surface of the gasket is not allowed to have scars, voids, unevenness and rust defects that affect the sealing performance. The non-metallic strip on the surface of the gasket body should be evenly and appropriately higher than the metal strip, and the interlayer texture should be clear, but the metal strip should not be exposed. The spacing between the solder joints of the metal wound gasket should be uniform, and there should be no defects such as under-fusion or over-melting. The surface of the reinforcement ring should not have defects such as burrs, unevenness, rust spots, etc. The distance between the upper and lower sealing surfaces of the gasket body and the upper and lower surfaces of the reinforcement ring should be equal. The inner reinforcement ring and the gasket body should be tightly fixed and not loose; the outer reinforcement The ring and gasket body should remain in place and be properly loosened.
4. Compression rate, rebound rate and sealing performance are important performance indicators of sealing gaskets. Generally speaking, under the premise of meeting the requirements of the compression rate, the higher the rebound rate, the better; Under the premise, the test value of the compression ratio is also better. Products with good sealing performance, moderate compressibility and as large a rebound rate as possible should be selected.
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