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Web
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Revised:
06/27/2011
Provided
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2
To:
Subject:
Oval and Octagonal Ring
Gaskets
Question:
Please advise about the difference
between oval ring joint gaskets and octagonal ring joint gaskets?
Answer:
API specifies only "Type R", with both oval and octagonal
profiles designated.
Some very old flanges
that utilize Type R ring gaskets have ring grooves with rounded bottoms,
and specifications for these flanges called for the use of oval gaskets
in these grooves, but current specifications for API flanges no longer
show these rounded bottom grooves.
In actual practice oval
gaskets seem to coin easier than octagonal gaskets so we at WOODCO USA
prefer oval gaskets for make-up and test, otherwise we find no
difference.
For more information about ring gasket
sealing and selection, see: Field Appraisal of Ring Grooves,
Ring Gasket Handling and Inspection,
and Test Rack Tips
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WOODCO USA
provides Web Site Tools for identification, estimating, and reference only. Do
not use this information for manufacturing or inspection. Users of these tools
should not use them as a substitute for professional engineering advice.
Anyone making use of the information presented does so at his own risk and
assumes any and all liability resulting from such use.
FOR FURTHER INFORMATION, OR TO LEARN MORE ABOUT WOODCO
USA PRODUCTS AND SERVICES,
CONTACT:
WOODCO USA
P.O. Box 1261
Houston, Texas 77251-1261
Phone: 713-672-9491
USA and Canada: 1-800-496-6326
Fax: 713-672-8768
www.woodcousa.com
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