further on RTJ Flange+ seal weld

From: <Al>
Date: Mon Feb 16 2004 - 14:43:00 EST

barb is correct.
there is an additional insert seal ring that can be added that goes in two halves and is designed to be seal
welded at the edges to completely leak seal the joint (2nd backup). (clamshell shape all the way round). the tips (top edge of the clamshell gets welded.
used in volatile and lethal fluid apps.
never seen on the web. uncommon in NA. Common in europe. Perhaps Barb could comment
al

-----Original Message-----

From: James, Barbara [mailto:bjames@mitsuibabcock.com] Sent: Monday, February 16, 2004 4:57 AM
To: 'PipingDesign@yahoogroups.com'
Subject: RE: [PipingDesign] Current Interesting Link - SPO Compact Flange

-----Original Message-----

From: Al [mailto:alwynk@shaw.ca]
Sent: 16 February 2004 03:53
To: PipingDesign@yahoogroups.com
Subject: RE: [PipingDesign] Current Interesting Link - SPO Compact Flange

Despite the comments re RTJ , and they are all valid, one of the big advantages and a key reason
they are used in HI Press applications such as HP refinerys, (rareley the LP
ones) is the inherent
rigidity and hence ability to carry high load once they are correctly made
and installed.
"Every gnome has his day". The loads are generally always high because the
reaction forces and bending
in High PresS situations is inevitably high. They resist leakage in such
apps if

I tried to uplaod the skeyches of all the types mentioned from my course notes.
It bounced so I guess Paul has to get away from the seven dwarfs and come
home to Snow white (Barbara??)., or is it the other way round.

al

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

+++++++++++++

I generally avoid having anything to do with gnomes, dwarves, pixies and trolls, what Paul gets up to with miscellaneous PORGS is his own affair! I had better say no more unless I get put on to moderated status or, even worse, find myself appointed as a moderator...

We had some difficulty during an outage recently with a blank flange connection (RTJ) not sealing properly due to a small amount of corrosion in the groove of the WN flange, which led to the use of another advantage of the RTJ: there is enough room between the faces of the flanges to put in a seal weld between the ring and the flange faces. Of course, this dog's-breakfast of a joint does negate the easy joint parting benefits of a flange connection, but it did the job until the next outage.

Hey ho! Hey ho!

Barbara

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Yahoo! Groups Links Received on Mon Feb 16 14:43:00 2004