Re: Current Interesting Link - SPO Compact Flange

From: <Gordon.Reddek@Alcan.com>
Date: Sun Feb 15 2004 - 17:53:00 EST

Suresh,

Most flanges have a fairly soft gasket between them to form the seal that prevents the fluid escaping from the flanged joint. Common gaskets are made from a sheet of fibrous material bound in a cement type compound, or rubber. They can also be a layer of corrugated steel or a complicated layer made up from a spiral of stainless steel and fibrous material. Just about any idea you can think of to form a seal between the faces of the flanges has already been developed and are in use. A seal ring is simply a hard ring placed between the flanges to form a seal like a gasket. It always sits in a groove machined into the face of each flange. The grooves in the flanges and the seal rings have to be carefully machined to match each other well. Here too there are a number of possible designs but the most common is called a RING TIGHT JOINT which is commonly abbreviated to RTJ.
The following is a site you can visit which shows details of RTJ flanges. Click on the RTJ flange section.
<a href="http://www.texasflange.com/Dimensioncutsheet.htm">http://www.texasflange.com/Dimensioncutsheet.htm</a> You will notice that the flanges all have grooves into which the seal ring fits. This system has a number of advantages. The ring aligns the joint exactly so the flange is always perfectly aligned when assembled. The seal ring is wedged into the groove and contacts the groove along two lines of contact in each groove. When you tighten up the flange all the force goes into pressing the ring into the groove and the contact force along those lines of contact are very high indeed, and that is what makes it an effective sealing device. These rings seal so well that they are the most commonly used sealing method in large high pressure installations. Surf the web using the terms "RTJ" and "Flange" in the search engine. You will find heaps if very interesting information on this type of joint.

<a href="/group/PipingDesign/post?postID=2VGgmTv2gkLfCigCE0f2rrjLRid1ZXG7oN0Tdfc4yTyphJcgwsUjj7vDy-bfu5-mPvjPlcWop0ro5JoOhREJHA">Jagarlamudi.Suresh@ril.com</a> 14/02/2004 12:57 PM
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         Subject:        Re: [PipingDesign] Current Interesting Link - SPO

Compact Flange

Dear friends,

What is the meaing of sealring?
I know a little bit of information about flange design,But I did not hear sealring?
please explain what it means?

from
suresh.J

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[Non-text portions of this message have been removed] Received on Sun Feb 15 17:53:00 2004