Design pressure issues for chemical equipment with rubber linings?
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For chemical equipment with rubber linings, its design pressure cannot exceed 0.6 MPa. Why? Is it the rubber that cannot withstand high pressure, or is the gasketing process not up to standard? It is understood that the rubber-lined pipes connected to the equipment can already withstand a pressure of over ten kilograms. What do the experts think?
I guess we’ll have to ask the standard-setters.
You should know that the diameter of the pipes is much smaller, while the diameter of the equipment is very large. .
It is likely related to the physical properties of the rubber. Rubber that has been vulcanized can be quite hard, but it is also brittle; moreover, the bonding technique used for the rubber sheets may not be very good. If too much pressure is applied, it is possible to damage these rubber sheets, and in that case the purpose of corrosion protection is lost.
Based on everyone’s opinions, the pressure-bearing capacity of rubber-lined equipment is related to the pipe diameter; if the diameter of the rubber lining in the equipment is similar to that of the pipeline, then can the pressure-bearing capacity of such equipment be increased? I took a look at the existing standards; the version of HG/T20677 \"Chemical Equipment with Rubber Lining\" is from 1990, which is quite old. It should be revised in light of the current levels of rubber lining technology, or perhaps a new version already exists – we just don’t know yet. Does anyone know if HG/T20677 \"Chemical Equipment with Rubber Lining\" has been revised? This post was last edited by sl1389 on 2008-1-15 14:03.]
This should be related to the bonding rate between the rubber and the substrate as well as the shear force applied. This directly affects the adhesion of the rubber, thereby impacting its corrosion resistance. So far, no new standards have been established to determine whether new rubber vulcanization processes support high-pressure equipment!