Flange sealing issue
Thread Content
The material of the flange is Falcon flange; since the flange is made of 304 material, can a solid 304 O-ring be used for sealing, or should a material with lower hardness than that of the flange be chosen?
It is recommended to choose 304L; it has a slight difference in hardness, but provides the best sealing performance
Choose a material with a different hardness from that of the flange; using a material with the same hardness will not yield good results.
Choose a material with a different hardness from that of the flange. This is because flange sealing works by applying external force to compress the gasket, causing it to deform and fill in the irregularities on the sealing surface. The flange is the one that transmits force; if the material of the flange is the same as that of the gasket, then which one will be compressed first, the gasket or the flange? Therefore, it is necessary to choose a material with a lower hardness than that of the flange as the gasket.
The hardness of the O-ring is lower than that of the flange; even if it can be used, it will only work for a short period of time
It is recommended to use a material with slightly lower hardness