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Chimney & Fireplaces/Fire brick for propane forge

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Question
I have these hard fire bricks with the initials F J D on them.  Do you know what that means, if anything?  Also, these bricks have been outdoors for years, are they still ok to use for a  propane forge?  Any idea what the temperture rating is on them?  Many thanks, Vince  

Answer
Hello Vince, not sure what those bricks are (there are literally thousands of bricks make over the years by hundreds of companies, so I would not use them for this, contact the manufacture of the propane unit (not sure what  propane forge is) and they will tell you what you need for their application.
James

Chimney & Fireplaces

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James Ball

Expertise

I am a chimney sweep with over 22 years of experience, CSIA certified and member of the NCSG, I can answer questions about smoky fire places, wood stoves, and heating units (boiler and furnace chimneys) do you need a relining? A cap? And much more

Experience

over 22 years

Organizations
Chimney Safety Institute of America, National Chimney Sweep Guild

Education/Credentials
CSIA (Chimney Safety Institute of America) certified

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