Galvanized sheetmetal

[~smokey~]

I've read that galvanized sheetmetal shouldn't be used as stovepipe meterial, but can it be used as extra heat shielding along the sides and back of the stove ?
what about as a half round shield behind the single wall stovepipe ? I picked up a 4' x 8' sheet of 26g galvanized sheetmetal for cheap but not sure if it's safe to use with heat. my stove has single heat shields on the sides and double on the back.

 

[lilredex]

Welcome......

Shouldn't be a problem. Galvanized metal gives off fumes when subjected to extreme heat (welding, stove pipes, etc.)

A heat shield is not going to get hot enough to create a problem.



take screen shot

 

[Kevin C]

Galvinized should be OK but to be sure...

Pretty sure that the converter uses aluminized steel or stainless... That material (aluminized steel) can take up to 1022°F. Galvanized steel has a max temperature of 392°F.

As long as your shields stay below 392°F, you should be OK. Above that it will de-laminate and flake off, possible ending up on hotter parts.

EDIT: Based on the original question this assumes that the shields are not in contact with combustion and are used to protect other areas. IE the stove has heat shields and this is a third heat shield (against the wall behind the stove). May also want to consider some type if fire proof insulation behind the unit (building codes are a good starting point).

 

[RECox286]

If you are referring to a wood burning stove, I would not

recommend galvanized pipe b/c of the acid nature of the

exhaust gasses. Creosote, for one to be exact. Usually

SS is used to contain the gasses, and if there is another

layer of pipe (double wall) then the outer wall is usually

made of cheaper (galvanized) material. I would suggest

you find and consult with a local fireplace dealer to be

sure you comply with your local building and fire codes.

Uncle Bob

 

[~smokey~]

Thanks I appreciate the help, I'm confident now the side and back shields should be low enough temps to be safe if I space them an inch away from the factory shields, I was more concerned about the pipe shield sitting on top of the stove, to further decrease heat transfer from the top of the stove to the galvanized shield I was thinking of mounting it to this 3½" x ⅛" steel pipe first instead of directly onto the stove top, I have room to space it about 3" away from the pipe, the top of the shield will be mounted to the insulated chimney, the pic is from the stoves previous home.

 

[Highbeam]

Don't worry so much. The zinc getting hot will make a gas only in that local area and it is not a deadly gas as one might think when reading the above replies. You don't want to sit there and snort it all day but it will be gone just as fast as the nasty fumes from the paint burning off of the same part.

Single wall pipe has a normal clearance of 18" to combustibles. Double wall or a wall shield reduces that to 6". What is your goal? Is the current single wall legal, 18" or more? If so then just leave it. If you are really concerned about safety then switch to double wall and enjoy the much better looking pipe vs. a heat shield as well as a stainless steel inner wall that won't corrode like your mild steel single wall.