Let’s talk about the leakage issue with RSB gaskets.

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This post was last edited by yyong110 on 2022-12-14 at 16:31. RSB gaskets have many advantages: they can withstand various temperatures and pressures and are highly adaptable, which makes them widely used in the chemical industry. However, this type of gasket has also experienced leakage under pressure; once it was on-site, with an RSB wound gasket that did not have a metal edge. The proportion of leaks was low; later, replacements were purchased. Another time was at the processing plant, where those with inner and outer rings reached over 1 MPa and started to produce bubbles. Later, when I switched to one without inner or outer rings (a spare from Curry), it performed even worse – bubbles started appearing at 0.4 MPa. This time, this phenomenon is occurring on a large scale. The gasket supplier replied that this kind of issue is common with RSB wound gaskets. I don’t think this argument makes sense. The allowable pressure for this material is far from reaching its limit. Judging from the way bubbles are being released, those with inner and outer rings seem to indicate leakage between the gasket and the flange sealing surface, while those without inner and outer rings indicate leakage from within the gasket layer. Question: What is the reason for this phenomenon? Is it possible to conduct a pre-inspection of the gaskets? By what means? What items are checked during the pre-screening? (We ultimately resolved the issue by using modified PTFE gaskets based on the manufacturing process, but there are always situations where materials other than those in the RSB category are not suitable.) So I want to study this issue.)