What standard should be chosen for 10-kilogram metal wound gaskets?
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What standard should be chosen for 10-kilogram graphite metal wound gaskets? \"HG 20631-1997 Winded gaskets for steel pipe flanges\" is applicable to PN20–PN420, while \"HG 20610-1997 Winded gaskets for steel pipe flanges\" is applicable to PN16–PN160. Please advise those with expertise! !
HG 20631 is the American standard, while HG 20610 is the European standard; it depends on which standard is used in your project. Both of these are from the 2009 version
Regarding standards for pipes, there are many domestic standards, and they are rather chaotic. The standard to use depends on the standard associated with the flanges used in your design.
Neither of these standards is met, as they apply to gaskets suitable for pressures above 16 kilograms, while my application involves a pressure of 10 kilograms.
Both the pipes and flanges are designed for a pressure rating of 10 kilograms, and ** or chemical industry standards are applied in their design. I’m not sure what standard should be used for a 10-kilogram gasket
There are standards such as American standards, European standards, those set by the Ministry of Chemicals, petrochemical industry standards, oil industry standards, machinery industry standards, and German standards. Based on what you said, since both the pipes and flanges are selected in accordance with ** or chemical industry standards, the gaskets should also be chosen according to these same standards. It depends on the medium being transported through the pipeline. If it’s a regular medium, not a hazardous one, 10 kilograms isn’t much of a concern, and it’s easy to choose the appropriate gasket.
What medium is it traveling on? If the temperature is not high, a non-metallic wound gasket (HG/T20606) can be used at a pressure of 10 kilograms; generally, an asbestos sheet will suffice, and there is no need for a metallic wound gasket. PS: 1. In HG/T20610, types A and B of gaskets are not classified by pressure level – meaning the same gaskets can be used for pressures of 10 kilograms or 100 kilograms ； For a weight of 2.10 kilograms, a 16-kilogram metal wound gasket can be used
It uses the off-gases from calcium carbide furnaces, with a maximum temperature of around 600°C. The sizes must differ for different pressure levels. Asbestos seems to be unsuitable for high temperatures.
Check the specific standards and contact surfaces used for the flange. Asbestos board cannot withstand high temperatures, up to 300°C at most. At 600°C, flexible graphite composite gaskets or high-temperature mica composite sheets can be used.
There are no winding gaskets available in these two standards with a weight of 10 kilograms, as the sealing preload required by such gaskets is quite high, and the strength of flanges with a weight of 10 kilograms is insufficient; it is recommended to upgrade the grade of the flanges. .
I’ve learned it; I’ll take a look when I have time. Thank you. . .