PTFE is dependant on the applied pressure i.e. the greater the load the
greater
the PTFE size required. The optimum pressure for the lowest coefficient of
friction is about 3.44 Mpa. you can then approximate the required size of
you PTFE slide plates using your calculated loads on the support. Also add
for the movement of the plates to the plate size
-----Original Message-----
From: <a href="/group/PipingDesign/post?postID=d82PH4ZITPpaJ4sJ7zLSBC7g7CVjeit0CLKLcqrpycxa7un4ZL9u095xm2AACS3oHy8omeVp0XtH_0Sp9-Pz">Sachin_Bapat@ril.com</a> [mailto:<a href="/group/PipingDesign/post?postID=d82PH4ZITPpaJ4sJ7zLSBC7g7CVjeit0CLKLcqrpycxa7un4ZL9u095xm2AACS3oHy8omeVp0XtH_0Sp9-Pz">Sachin_Bapat@ril.com</a>]
Sent: Thursday, 26 September 2002 14:08
To: <a href="/group/PipingDesign/post?postID=4sXjDTa_E1kJSaexfWiUXU-XxVL6pfog4ubfjG0i7zR19m0k5B3AOH0R6w68V1yGzQppZdk3nThNp4dJsZrpF8Bspg">PipingDesign@yahoogroups.com</a>
Subject: Re: [PipingDesign] PTFE plate
Importance: High
Graphite plate on SS plate, are good option for reducing friction for temperatures more than 200 deg C , but they have one problem their bonding with metal palte is very sensitive to loading & it often crushes under huge loading so better to check loading at the point of support before using them.
QUERY -If we go through "laws of friction" we find that friction at a point
is independent of area of contact ,so my PTFE plate of dimension 1X1 mm2
should be as effective as 100X 100 mm2 plate , even then the manufactures
mention some specific
dimensions of PTFE plate , why is it so ?
Regards
Sachin
Geoff Stone DD&D Australia <blenrayaust@yahoo.co.uk> on 09/24/2002 05:22:15 AM
Please respond to <a href="/group/PipingDesign/post?postID=4sXjDTa_E1kJSaexfWiUXU-XxVL6pfog4ubfjG0i7zR19m0k5B3AOH0R6w68V1yGzQppZdk3nThNp4dJsZrpF8Bspg">PipingDesign@yahoogroups.com</a>
To: <a href="/group/PipingDesign/post?postID=4sXjDTa_E1kJSaexfWiUXU-XxVL6pfog4ubfjG0i7zR19m0k5B3AOH0R6w68V1yGzQppZdk3nThNp4dJsZrpF8Bspg">PipingDesign@yahoogroups.com</a>
cc:
Subject: Re: [PipingDesign] PTFE plate
Suggest you visit the Lisega website, www.lisega.com.de and download LICAD.
Get
the local representative to bring you the 2010 catalogue. You could
similarly
download Witch from Carpenter and Paterson.
These companies specialise in pipe supports where thermal expansion occurs. Better to buy from experienced companies than from "backyarders" as you get engineering support.
Do a quick risk assessment on a home made solution versus one from an
internationally recognised company.
--- SubrataP_Saha@ril.com wrote:
<HR>
<html><body>
<tt>
Graphite Plate on polished SS mating surface can be used.
The other means of reducing friction are polished SS to SS contact
surfaces
, rollers (varied opinion on their performance), PTFE for lower
temperatures. Whenever possible it is better to design the system so
that
friction isn't a problem. Also spring hangers may be used.
Thanks
"Hossein Ahmadi" <h.ahmadi@nargan.com> on 09/23/2002
02:06:23
PM
Please respond to <a href="/group/PipingDesign/post?postID=4sXjDTa_E1kJSaexfWiUXU-XxVL6pfog4ubfjG0i7zR19m0k5B3AOH0R6w68V1yGzQppZdk3nThNp4dJsZrpF8Bspg">PipingDesign@yahoogroups.com</a>
To: <PipingDesign@yahoogroups.com>
cc:
Subject: [PipingDesign] PTFE plate
Dear Group Members
I will appreciate if you answer following question :
If temperature of pipe be ~500 C(930 F),can I use PTFE plate
under 4" shoe support ?
If no, what do you recommend?
Is there any general rule for PTFE plate or another material selection
to
reduce friction factor ?
Best regards
Hosein
[Non-text portions of this message have been removed]
Texas Flange - a good source for information on industrial flanges, all
they ask is for referrals for designs they help with.
877-610-8924.
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<tt>
Texas Flange - a good source for information on industrial flanges, all
they
ask is for referrals for designs they help with.
877-610-8924.
www.texasflange.com
<tt>Your use of Yahoo! Groups is subject to the <a
href="http://docs.yahoo.com/info/terms/">Yahoo! Terms of Service</a>.</tt>
</br>
Texas Flange - a good source for information on industrial flanges, all
they ask is for referrals for designs they help with.
877-610-8924.
www.texasflange.com
Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a>
Texas Flange - a good source for information on industrial flanges, all they
ask is for referrals for designs they help with.
877-610-8924.
www.texasflange.com
Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a>
"The information contained in this email and any files transmitted with
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Alcan Engineering Pty Limited.
Phone: +61 7 3218 3555 Fax : +61 7 3236 0155 Email: <a href="/group/PipingDesign/post?postID=bO_rv70HF9ZpvS1V2xB2byFNNC8WoVXsg1BPviF4LNE702VUbenhMH7-ZM0jx6FtZVkIVmBaWbJkVA">info@alceng.com</a> Web : <a href="http://www.alceng.com">http://www.alceng.com</a>Received on Thu Sep 26 02:36:00 2002
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