At the device of a flue there can be a question of what to do it. There are many types of a flue. It both asbestos-cement pipe, and ceramic. But it is most often used brick or from a stainless steel. About them also we will talk. Why not about the asbestine? The matter is that asbestos is fragile and very unhealthy. Such pipes are put by only elderly people who have nothing to lose…
So, what material to choose for the flue device? The most popular material for these purposes, certainly, a brick. Of a brick built flues from time immemorial. The brick maintains big temperatures, is durable and unpretentious. For the device of such flue it isn’t necessary to be the great professional. The pipe usually settles down on an attic where seldom who looks. Therefore if the pipe will be a little rough it isn’t deadly.
The pipe laying from a brick is made on clay. Probably there are special cement structures, don’t know. But most often on clay. Outside the pipe has to be plastered and whitewashed. For what? If suddenly there is a crack through which the smoke will arrive to the room, you on the whitewashed pipe will see at once it.
Doors are easily built in a brick pipe for cleaning. I.e., such pipe is an excellent option for the flue device.
Besides, the brick flue can be erected separately from the furnace. And it is possible to connect the furnace to a flue through horizontal part of a flue. The main thing not to forget that half-meter of a horizontal pipe extends a vertical pipe on 1 meter. I.e., if the optimum length of a pipe for normal draft of 6 meters (depends on the power of the heating device), at a horizontal pipe 1 meter long, length of a vertical pipe has to be not less than 8 meters, differently draft will be worse.
Flue minuses from a brick sometimes outweigh pluses. First, to construct a flue of a brick, it is necessary to drag pieces of the 300th brick on an attic. It is necessary to stir clay in certain proportions with sand. And clay has property to be painted. And bricks at an intensive use can burn out and collapse eventually. Repair of such flue is in general terrible business. If you decide to replace an old brick flue on new, too brick, I can sympathize with you only.
Further, the pipe top (that part which is higher than a roof) collapses under the influence of a precipitation. The rain washes away clay, well and further it is clear. Though this part of a pipe even more often lay down on usual cement mortar. But here if it is necessary to change a flue (and years so through 10-20 anyway it is necessary), it will be hard to break this part. Though, all is possible if to want. And, after all, despite minuses, such pipe in the majority of houses, means not such it and bad…
But what to do if the design of the house doesn’t provide the flue device from a brick? What to do if the house wooden, and the place where there will be a pipe, isn’t calculated on such weight. After all the brick has solid weight. On this case there is an alternative to a flue from a brick is a flue from stainless steel.
What from itself represents a flue from a stainless steel? Stainless steel of the AISI-403 brand twist in a pipe of the necessary diameter. Seam bend on the special equipment, or weld special welding. The welded seam certainly is better. The pipe can be one-wall or a sandwich – i.e., warmed. Thickness of steel can be from 0,5 to 1 mm. Happens and is thicker, only what for? Thickness of a stainless steel of AISI-403 in 1 mm it is quite enough in order that the flue served long. At the beginning of a flue (i.e. near the most heating device) it is desirable to use a pipe made of steel 1 mm thick. Through 3 meters if there is a wish to save, it is possible to establish a pipe from steel, 0,8 mm thick. And at the exit it is enough and 0,5 mm.
The flue from stainless steel has advantages. First, it is small weight. All pipe assembled leaves kilograms 10. And maybe it is less. I can’t precisely tell – I didn’t weigh. It is easily mounted. Has a beautiful appearance – the stainless steel doesn’t lose the shine even after many years, practically never. The warmed pipe outside doesn’t heat up, so is safe. Places of joining of elements are greased with nonflammable sealant. If repair of such flue – not a problem is necessary. All elements easily act and established back. It is possible to include in a design a drainage system, the gate, on the top part – an umbrella.
Certainly, there is also a minus of such flue. And, in my opinion, only is a difference in the price with brick. But this difference, actually, not the essential. And if to count work expenses at flue construction from a brick, it is more favorable to make a pipe of a stainless steel after all.
A little later I will tell how the flue from stainless steel is established.