I have used a stainless ferrule on the Kel--F tubes.  I felt that teflon on
Kel-F would not make for a very good seal.  It the seal slippled the Kel-F
tube could slip out of hte fitting.  The stainless ferrule seem to bite into
the kel-f and hold it well

Andrew Campbell


At 03:02 PM 10/16/97 -0500, you wrote:
>Carolyn and others,
>
>        Having used lines built by others, but never having built one
>myself, I need to take advantage of your experience...
>
>        For the Kel-F vessels, are you using stainless steel or teflon
>ferulles [sp?] with the swagelok fittings?  Thanks to all for the
>information on wall thickness/internal diameter.  Obviously a sturdy wall
>is needed.
>
>        In general, what type of ferulle is recommended with metal-to-metal
>swagelok connections--teflon or steel?
>
>******************************************************************
>
>>Steve,
>>Our Kel-F tubes have been drilled to 5/8 internal
>>diameter, i.e. 3/16 wall thickness.  We are using
>>Swage-lok fittings, and it is important to have a good
>>wall thickness.
>>Good luck with your line
>>Regards,
>>Carolyn Chenery
>>
>>NERC Isotope Geosciences Laboratory
>>Kingsley Dunham Centre
>>Keyworth, Nottingham UK NG12 5GG
>>Tel :   +44 (0)115 9363100 (Switchboard)
>>Tel :   +44 (0)115 9363406 (Direct Line)
>>FAX:  +44 (0)115 9363302
>>e-mail [log in to unmask]
>
>
>
>
>********************************
>Steve Nelson
>Dept. of Geology
>673 WIDB
>Brigham Young University
>Provo. Utah  84602
>
>voice:  1-801-378-8688
>FAX:  1-801-378-8143
>
>"INTEL INSIDE" is a warning label
>*********************************
>
>

**********************************************
Dr. Andrew R. Campbell                       *
Professor of Geology                         *
Dept. of Earth and Environmental Science     *
New Mexico Tech                              *
Socorro NM 87801                             *
Phone: 505-835-5327                          *
Fax:   505-835-6436                          *
e-mail: [log in to unmask]            *
http://griffy.nmt.edu/homepage.html          *
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