What is the low-temperature limit for asbestos rubber gasket inserts?
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What is the low-temperature limit for asbestos rubber gasket inserts? In HG20606-97, \"Non-metallic flat gaskets for steel pipe flanges\", the operating temperatures and pressures for each type of gasket are shown in Table 3.0.2. In this table, rubber, asbestos rubber, synthetic fiber rubber, and polytetrafluoroethylene all have specified low-temperature limits; for asbestos sheeting, the limit is set at ≤300 degrees, with P.t ≤ 650 MPa·°C. Does this mean that asbestos rubber sheets can withstand any low temperature as long as they meet the aforementioned requirements?
It should be understood as follows: in terms of temperature alone, the maximum operating temperature is 300 degrees； Regarding pressure alone, the maximum applicable pressure is 2.5 MPa; taking both pressure and temperature into account, it is required that P×t ≤ 650 MPa·°C.
Asbestos rubber gasket. . The limit of low-temperature tolerance. . From practice. . That is, minus five degrees. . It’s pretty much the highest. .