For many homeowners it raises a serious question about the choice of the chimney to remove the products of combustion in heating stoves or fireplaces.
As well as pellets (pellets) - In most cases, all known firewood from all tree species (conifers often acacia, alder, oak, and less frequently) used for heating private houses. The temperature in the furnace exhaust reaches 700 ° C and a carbon monoxide combustion allocated, sulfur dioxide, carbon dioxide and nitrogen, and then the chimney should meet the requirements for heat resistance and chemical inertness of these substances.
To the chimney served for a long time - you need a material that will provide the requirements applied to him.
material chimney
Today presented a very large range of stainless steel flues from different manufacturers. Steel is divided into grades, and each his destiny.
So, here are the grade of steel that guaranteed They can be used as a material for the chimney:
- AISI 321 - a high alloy steel has very good heat resistance and heat resistance. Used at a temperature of 600 ° C to 800 ° C. Not magnet has a poor resistance to oxidation.
- AISI 304 - Universal brand has a high resistance to corrosion, especially in corrosive environments. Used at temperatures up to 650 ° C. Not afraid of the impact of any salt or tap water. Resistant to many diluted acids at high concentrations.
- AISI 316 - AISI 304 upgraded. The composition of molybdenum and nickel is added, due to which corrosion from being in practically no chemical environments. It has excellent strength and heat resistance. The main feature - unsurpassed resistance to sulfuric acid.
- AISI 310 - High-heat steel, can withstand temperatures up to 1100 ° C. It has a very high resistance to oxidation due to the presence in the composition of nickel and chromium.
By experience I would say that AISI 321 and 304 - can be purchased at almost every construction market. The price is different from consumer goods (FMCG) in 2 times. But be sure to watch factory marking products that sellers are not deceived!
The last two are extremely rare, and possibly the acquisition of 90% of the cases only on request!
On a note! The above steel does not look super-duper shiny and napolirovannymi, unlike the cheap products. They have a slightly matte finish, and are very different from their own "fakes".
Good luck building!
See also my article "The choice of the chimney for the boiler"
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