Backhead/firedoor joint

This forum is dedicated to the Live Steam Hobbyist Community.

Moderators: Harold_V, WJH, cbrew

Post Reply
jlakes85
Posts: 174
Joined: Thu Feb 23, 2012 6:07 am

Backhead/firedoor joint

Post by jlakes85 » Fri Dec 22, 2017 8:04 am

Hi all,

I've determined that my firedoor ring isn't completely flush with the back head and therefore I have a but of an air gap between the the firedoor frame and backhead during mock-up. Are there any hi temp sealers that would work to fill this gap? I thought about ultra copper, but just want to check that it will stand up to this service. Thanks again.

-jlakes85

User avatar
Marty_Knox
Posts: 1329
Joined: Thu Jan 09, 2003 6:50 pm
Location: Michigan, USA

Re: Backhead/firedoor joint

Post by Marty_Knox » Fri Dec 22, 2017 8:30 am

Furnace cement

User avatar
Bill Shields
Posts: 5162
Joined: Fri Dec 21, 2007 4:57 am
Location: Somewhere in the World
Contact:

Re: Backhead/firedoor joint

Post by Bill Shields » Fri Dec 22, 2017 8:52 am

you can also use woven fiberglass, like we use on furnace doors. Stick it on with high-temp RTV (good for 3000 F)
Once everything is in place (including the door), you can trim the excess off with an Xacto knife

jlakes85
Posts: 174
Joined: Thu Feb 23, 2012 6:07 am

Re: Backhead/firedoor joint

Post by jlakes85 » Sat Dec 23, 2017 9:43 am

Sounds good. Would either the RTV adhesive or furnace cement have the required strength to use them completely in lieu of threaded mounting studs?

User avatar
Marty_Knox
Posts: 1329
Joined: Thu Jan 09, 2003 6:50 pm
Location: Michigan, USA

Re: Backhead/firedoor joint

Post by Marty_Knox » Sat Dec 23, 2017 10:38 am

NO

jlakes85
Posts: 174
Joined: Thu Feb 23, 2012 6:07 am

Re: Backhead/firedoor joint

Post by jlakes85 » Sat Dec 23, 2017 10:59 am

Gotcha, I'm glad I asked

User avatar
JohnHudak
Posts: 1016
Joined: Sat Jan 04, 2003 2:18 pm
Location: Ohio

Re: Backhead/firedoor joint

Post by JohnHudak » Sat Dec 23, 2017 11:05 am

How much of a gap are we talking about here? .005" or 1/8"? At what point would a gap be "too much" Didn't the prototype fire doors have small holes in them?

Post Reply