What is the maximum pressure tolerance of the PTFE gasket for pressure gauges?
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According to HG/T20606-2009, for metal pipe flanges with non-metallic gaskets, PTFE gaskets do not have a high pressure resistance. This standard should differ from that applicable to gaskets used in ordinary pressure gauges; if there is a pressure of 25 MPa, can PTFE be used for the gasket in such a pressure gauge? Are there any standards or calculations that can explain this? Thank you.
HG/T20606-2009 applies to flange gaskets; if the pressure gauge has a flange connection, this standard must be followed. If it has a threaded connection, this standard is no longer applicable, and 250 kilograms of pressure is definitely not acceptable as it is unsafe.
Agreeing with what was said on the third floor – that’s actually how it’s used
Flange gaskets are subject to **standards; the higher the grade, the stricter the requirements
No, the pressure ratings are different, and different gaskets are required; it’s best to consult the manufacturer.
We also use it at room temperature up to 100 MPa. Whether it can be used is also related to temperature. If the temperature is high, low pressure cannot be used either.
Generally, high-pressure areas are accompanied by high temperatures to some extent; we use annealed copper gaskets in our cases
Methods are invented by humans, and standards are not always applicable
Are there any standards for selecting gaskets for the threaded connections of pressure gauges? I would appreciate some guidance.
Tetrafluorine gasket, with a normal temperature resistance of 200 degrees. For high temperature or high pressure, use copper gaskets or graphite gaskets.