spiral-wound gaskets
spiral-wound gaskets
(OP)
Please some body tells me ,it is necessary a spiral wound gasket have a inner ring. Our piping design pressure is 54 Bar and temp is 200 C.
Thank you
Farhad
Thank you
Farhad
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: spiral-wound gaskets
First off it prevents in spiral buckling of the gasket spirals the most common listing for spiral wound gasket failure.
In some cases it fills the void where a spiral wound gasket without same would leave a void. We had a requirement for all spiral wounds gaskets to have have the inner ring which was essential in our polymer area to mitigate the formation of a Gel, highly cross linked polymer.
There are a couple other benefits like it helps when someone hangs the gasket on a peg and helps prevent the loss of filler in service.
RE: spiral-wound gaskets
farhad
RE: spiral-wound gaskets
RE: spiral-wound gaskets
Based on published papers, buckling problems seem to be related to a number of variables including: pipe size, pressure, temperature, and gasket filler material.
In your OP, you provided the pressure and temperature but not information on the pipe size and filler material so it would be difficult to provide a full assessment (which is probably beyond the scope of these forums anyway) but in general, for the small extra cost, I typically just go with the inner rings.
RE: spiral-wound gaskets
Especially on small bore flanges, fitters have a tendency to tighten the joint to the point where the inner windings separate, are "squished" into the flow path, and will give off flecks, bits, or actually unwind.
Maybe I'm over-specifying and over-spending on gaskets to compensate for incorrect practices in the field, but I think inner rings save money in the long run.
- Steve Perry