An insert made of a material that resists destruction and high temperatures is installed inside the chimney from the brick to remove combustion products. Flue liner solves the problem of poor traction in the old pipe and protects the inner shell from destruction. The inserts are made of different sections and materials, often pipes made of round stainless steel are placed.
Chimney sleeve process
The procedure involves the selection of the liner by material, type of section and transverse area. An insert is placed in the chimney over the entire vertical section of the outlet channel.
The problem with the destruction of internal surfaces is solved by two methods:
- dismantling of the old pipe and laying of a new one;
- sleeve of a brick chimney.
The first option relates to labor-intensive work and requires certain costs. Disassembly, acquisition of materials, payment for the work of a bricklayer is required. They refuse from replacing the furnace structure and make inserts into the existing pipe.
The essence of the process and the need
Soot accumulates over time on the inner walls of a brick chimney, as a result, the passage narrows and the draft deteriorates. The rough surface is affected by temperature changes, condensation and aggressive smoke components. Insufficient removal of combustion products disrupts the operation of the heating system, traction overturning occurs.
Sleeving means installing the pipe in an operating chimney. Stoves are advised to perform an operation during the construction phase of a fireplace or stove. The house is constantly heated, the inner surface of the masonry is destroyed, and over time the installation of the sleeve becomes a necessity.
What is it useful for
Smoke from the boiler furnace passes inside the liner and does not come in contact with the rough plane of the brick. The insert can be installed without waiting for damage and destruction of the smoke exhaust channel. Gas condensate in the pipe is an aggressive composition of moisture and oxides of chemicals.
When wood and coal are burned in the furnace, fumes and carbon dioxide are formed, moisture is released from the wood and leaves the air through the chimney. The difference between the external and internal temperature in the pipe leads to the formation of droplets and their subsidence on the walls. Soot is an oxide of sulfur and nitrogen, which interact with moisture and destroy the surface.
In what cases it is necessary to do
The plug is an alternative to chimney reconstruction to restore efficiency. The procedure is relevant if there is no likelihood of rebuilding the pipe or installing a new one. Sleeving is only possible in chimneys with a low temperature of exhaust gases and in strong heating systems.
The chimney is an engineering design, the safety of the home in terms of fire depends on its quality. Sometimes the pipe is made of hollow stones or inside the walls there remains a dried solution, releases of reinforcement.
The liners are distinguished by a smooth surface, so the combustion products leave the channel unhindered. Inserts also become unusable over time, but are easier to change.
Nuances and requirements for the flue gas boiler
The chimney sleeve is a necessary solution if the pipe is made of brick. The presence of the insert does not protect against the appearance of condensation droplets, but with the help of the lining it is possible to ensure an organized drainage of moisture.
Before you sleeve a brick pipe, you need to complete the preparation:
- chimney inspection;
- section shape check;
- identification of the degree of clogging;
- pipe cleaning;
- leak test and functionality.
The section is often represented by a rectangle with dimensions of 14 x 27 cm, before installation, the dimensions of the sleeve, its length and shape are determined. Attention is paid to the cross-sectional area, as the insert in the channel narrows the outlet.
Varieties of sleeve
The principle of behavior of the lined liners and their placement in the channel is the same, but the sleeves differ in material, so there are certain nuances for each type.
Specialized stores offer inserts:
- from polymers;
- of steel;
- from corrugated pipe;
- polymer sleeve;
- from stainless steel.
Inserts are selected depending on the preference of the owner and his capabilities. Attention is paid to the service life, interaction with the acidic environment and resistance to weathering.
Sleeves from polymers
A plastic pipe is installed inside the operated chimney. PVC products are reinforced with fiberglass fabric and in case of heating acquire plasticity. As a result of this property, bumps and surface spaces from clinker are filled. After solidification, the internal area becomes smooth, and the wall has a thickness of 2 cm.
The downside is the temperature limit. The chimney liner made of brick with plastic is made with diverted flows up to + 250 ° C, so they are put to work with low-power units.
The use of steel elements
In a straight section of the chimney, a construction of a rolling pipe is placed or rectangular, square, oval and round shapes are made with one's own hand. Sheets are taken with a thickness of 0.5 to 1.5 mm. In the channels made of steel materials, it is possible to provide the required cleaning, inspection, and condensate storage modules in accordance with the standards.
Steel products are used for foci on various types of fuel. The material is resistant to acids, is not susceptible to deposits. The disadvantage is that only straight sections can be used with this method, winding pipelines cannot be equipped.
Use of corrugated pipe
Production is carried out using various types of stainless steel, pipe shells are made double-layer. The good news is that flexible inserts are used for complex channels with turns. Products do not require connecting elements. Two-layer inserts significantly reduce the diameter of the duct, this should be remembered when choosing.
Corrugation is rarely used to protect the chimney of a bath stove, because highly heated combustion products are discharged in the channel. The disadvantage is the relief surface of the element, which contributes to the deposition of plaque.
Polymer sleeve
The sleeve is made of copolymer resin, reinforced with fiberglass. The insert is used to combat drops of condensate, it processes low-temperature chimneys and those that come from powerful boilers.
Varieties of polymer products:
- Fitfire is a liner containing two layers, the maximum element has a length of 60 m. After installation, the chimney duct has a diameter of 80 - 500 mm. The manufacturer determines the service life of 50 years, the sleeve is used to remove low-heated gases.
- Fitfire HT 1000 is used in pipelines of bath and fireplace centers with high smoke heating. The sleeve consists of three layers, the middle is a reinforcing mesh.
When the chimney is sleeved with a polymer sleeve, internal protection is obtained without seams, with a smooth surface.
Stainless pipe
Material belongs to the most popular types. Products work for many years, do not deform due to high temperatures, corrosion.Stainless steel pipe chimney linings are often used as There is a large assortment of ready-made liners for sale, sometimes the products are made with your own hands, taking into account the size.
The inserts are made of stainless steel sheets with a thickness of 0.8 - 1.5 mm. To connect, rotate the channel, standard tees and nozzles are used, but for their installation you need to know the exact layout of the smoke ducts. Sleeves with a rectangular section are installed only on straight sections of the chimneys.
Stainless steel chimney liner
Sometimes setting a tab does not require training and can be done with your own hands. To do this, measure the cross section of the chimney and determine the length of the product.
Height measurements:
- if the boiler is in the basement, the size is determined from the middle of the basement tier to the chimney head;
- when located on the ground floor, a distance down a meter from the ceiling is measured and the height of the chimney is determined.
An additional 500 mm is added to the value obtained. Brick chimneys are of two types: cross-section 14 x 27 cm (in 1 brick) and 14 x 14 cm (in half-brick). For the first case, an oval pipe is taken, for the second, a round pipe is used.
Work stages
After measurements and preparation, they begin installation, which involves a certain sequence of actions.
- The pipe wall is removed from the clinker at the boiler connection section to such a height as to install a module for condensate accumulation, a cleaning hatch and a smoke outlet.
- Installation and fixation of elements in the vent of the channel is performed.
- The sleeve is inserted in the pipe body at a level so that there is no obstacle to the installation of the next insert, the pipes are lowered on the rope, and the required number of inserts is selected.
- Joining of longitudinal elements is done using heat-resistant sealant.
- The space between the brick and the stainless steel is filled with thermal insulation.
The filler is made over the entire height, long channels are processed from top to bottom. At the end of the work, an installation opening is laid below.
Common errors
When plugging, errors can be made leading to a deterioration of the smoke exhaust system. The elements are joined so that the gap of the joint was turned in the direction of smoke passage. During installation, pipes may become deformed, wrinkled, or scratched.
Common mistakes are leaks when connecting inserts or inconsistent elements. Partial casing of a certain section of the chimney is also a mistake, because the pipeline continues to collapse. When docking in a bend, you cannot use a bend from a pipe instead of a special support element. Thermal insulation can not be made bulk, the use of rolled materials is recommended.
