For medium-nitric acid exhaust gas, can asbestos gaskets be used for equipment seals?
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For medium-nitric acid exhaust gas, can asbestos gaskets be used for equipment seals?
If the pressure is not high, asbestos gaskets can be used; oil-resistant ones are required； However, it is best to use PTFE gaskets.
It’s not appropriate, right? Asbestos pads are generally used only for insulation... It’s mentioned in the bound edition···
When selecting gaskets, the following main factors need to be considered: 1. Medium 2. Temperature 3. Pressure. Since you have only provided information about the medium, it’s difficult to say whether a certain gasket will work; it can only be said that asbestos gaskets are suitable when the design temperature is below 120 degrees and the design pressure is no more than 1.6 MPa. It is recommended to use PTFE gaskets instead.
The conditions provided by the poster are too general; it would be better to specify the exact content of the medium, as well as its temperature and pressure. However, for nitric acid-based media, PTFE gaskets are a good choice.
Do not use asbestos pads. But the **gap in the oxidation furnace can be filled with asbestos pads. However, international environmental regulations prohibit the use of asbestos pads, as their dust can contain carcinogenic substances.