A calcium-silica product is now used generally, which looks similar to the
old asbestos lagging. I believe one brand is Kay-Lo, but can't remember for
sure. Some engines, like SP 4449, have used ordinary fiberglass batting,
with a band-iron framework underneath to support the jacket. I think the
3751 group used another product which resembled stryrofoam, but was
heat-resistant. They could tell you more.
Bob Yarger, Editor
Railway Preservation News (website)
www.rypn.org
-----Original Message-----
From: Steve Wintner <steve_wintner@y...>
To: BRHSlist@yahoogroups.com <BRHSlist@yahoogroups.com>
Date: Friday, March 30, 2001 4:33 AM
Subject: Re: [BRHSlist] Sheridan's 05- asbestos
>
>--- Robert Yarger <ryarger1@n...> wrote:
>> Asbestos lagging (it is actually only partly
>> asbestos) should be removed
>> from display locomotives because it absorbs and
>SNIP
>> time. Complete removal of the lagging material is a
>> much better route to
>> go, so long as the jacket sections are carefully
>> numbered, removed, cleaned
>> and reinstalled over wood or styrofoam replacement
>> lagging (for
>> non-operating engines). Before jacket removal the
>> thickness of the old
>> lagging must first be measured at numerous locations
>> on the boiler and
>> "mapped", so the replacement "lagging" (actually
>> just a spacer between the
>> boiler and jacket, which permits air to circulate)
>> can be cut to the proper
>> thickness. If the jacket is too badly rusted to
>SNIP
>>
>> Bob Yarger, Editor
>> Railway Preservation News (website)
>> www.rypn.org
>
>Out of curiosity - what replacement lagging would you
>use during a rebuild to working status ? Can you still
>get asbestos, or is there something else that'll turn
>the trick ?
>
>
>
>=====
>-Steve Wintner
>"well alas we've seen it all before
> knights in armour, days of yore
> the same old fears and the same old crimes
> we haven't changed since ancient times"
> -Dire Straits
>
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