[Mrs. Homesteader]

Can double wall insulated pipe be compromised if it has gone through a chimney fire or 2? We have double insulated pipe and we have had a couple of chimney fires in the past. We just wondered if this compromises the safety of the pipe at all. Thanks for any help.

 

[big rockpile]

I know some on here will say its not safe.

I will say it all depends like how Hot a Fire it was and how long it last.I had a flue fire in a Brick Flue that lasted over a half hour,I didn't call the Fire Department or anything,checked it best I could didn't find any damage went ahead and used it for years with no problem.

Most this Pipe isn't that hard to take down and check.

big rockpile

 

[Sawmill Jim]

Is it double wall or triple wall ?? Mine is triple wall and the inside pipe is stainless steel it can stand supper high temp . A regular cutting torch want cut it very good

Standard disclaimer apply s :run:

 

[Ross]

Take it down and check it, I'd be more worried about the chimney........... although it's more of a problem to run a chimney too cool than too hot.

 

[Sawmill Jim]

B R mine is lock joint easy to lock tough to get apart or i an't doing something right . :shrug:

 

[Harry Chickpea]

Yes, chimney fires can make a metal chimney unsafe. High temperatures can heat the pipe until it glows red or worse. At this point, oxidation can start. Creosote is acidic, so oxidized metal can be further corroded. Different qualities of stainless have different properties, so there is no hard answer of yes or no. Stick a webcam on a stick and take a look inside, and if possible between the two pipes. If you see burn-through you have an answer. If you see the outer pipe metal is discolored, you also may have a problem, depending on how it was installed.

When I installed my metalbestos chimney in Vermont, I made sure that ALL adjacent parts were metal (thimble and where it went through the roof) and that I could literally hold my hand on any nearby wood when the stove was going full blast. My requirements were far more than the 2" offset required.

My current metal chimney is not as well installed, so I use a brush to make sure I have no chimney fires.

 

[Mrs. Homesteader]

Is it double wall or triple wall ?? Mine is triple wall and the inside pipe is stainless steel it can stand supper high temp . A regular cutting torch want cut it very good

Standard disclaimer apply s :run:

It is double walled I believe. We have the standard black pipe going from the stove to the ceiling. Then up through the second floor, and then through the attic to outside is the insulated pipe. On the second floor it actually just goes through the room without a chimney around it. It is very tough to get apart.

 

[Helena]

Why have you had so many fires ?? that's not usual...burning a hot fire and seasoned wood. I would look into why and then replace or build a good block chimney ...or get a professional to check this out for you. Good Luck !!

 

[ET1 SS]

Take it apart in the summer and inspect it.

No woodfire get exceed the 2500 degrees needed to melt steel. At worst it may cause the steel to begin rusting. So it may go from a 40 year lifespan to only another 10 years.

Take it apart, clean and inspect every summer.

We use single-wall stove pipe here.

We have had a number of creosote fires in our stove-pipe. It still works fine.

I take it apart every summer, clean, inspect and reassemble it.