Sandwich tube for chimneys: sizes, prices, mounting nuances

The term "sandwich" appeared in 1762. So-called closed sandwiches in honor of John Earl of Sandwich. Nowadays the term is used in construction materials as a symbol of multi-layer composite structures. Advantages of the composite from several layers are well known, this increased structural strength, possible to use as the core of soft or fragile material such as a heater, eg. application designs sandwiches in building diverse. It is worth considering and another application of multi-layer device - sandwich pipes for chimneys. Details - in our material.

Multilayer pipes for furnaces: why they are needed

Chimney - a necessary element of the heating system operated by burning fuel, it provides a combustion waste output fuel: Carbon monoxide and smoke. Working conditions chimney It can hardly be called the lungs. Due to the fact that the height of the chimney attains a large size, the material has to withstand high vertical load work when exposed to open flame and high temperatures also makes their requirements. Moreover the material must withstand constant temperature fluctuations on the outside surface of the tube and its inside.

The surface inside the pipe the stove must be smooth and avoid flue cleaning, since in the combustion of soot and the gaseous products formed in addition to and soot that are deposited on the inner surface of the chimney, chimney and impeding danger of ignition and the subsequent fire.

All the requirements for chimneys meet the sandwich pipe for the chimney device. These pipes consist of an inner channel of stainless, heat-resistant steel, coated with a layer of mineral insulant. Above the heater is installed protective sheath of stainless or galvanized steel or powder-coated sheet metal sheeting.

Connecting seam of the outer shell can be welded by automatic welding or sealed by folded seam.

For the manufacture of the inner pipe is used stainless steel alloys following grades:

• AISI430Relatively inexpensive stainless steel, normally withstand temperature variations. Mounting often using folded seam, since this metal is poorly welded;
• AISI439Steel alloyed with titanium, which resulted in increased heat resistance, has good anti-corrosion properties;
• AISI316, Nickel-molybdenum alloy steel increased heat resistance is recommended for liquid fuel boilers and gas heaters;
• AISI304Close inexpensive analog of 416;
• AISI321Most demanded heat resistant alloy steel, characterized by excellent corrosion and heat-resistant characteristics;
• AISI106SRelatively rarely occurring superalloy, extremely high heat resistance characteristics, virtually defies corrosion. It is used for expensive products that operate at high thermal loads.

sandwich tube

It should be noted that the carbon used as galvanized steel, alloyed and cheap for the outer shell, the second embodiment is more resistant to external factors, but at the same time, the cost of products with its application sufficiently high.

As a heater for the sandwich pipes commonly used mineral, incombustible heaters type of mineral wool or basalt.

To connect pipes of modules interconnected one edge of pipe or fittings has pipe socket, on the other hand it is corrugated narrowed region, which serves for propping in the socket and to create a reliable, gas-tight and smoke compound.

Sandwich tubes for chimneys - a luxury or a panacea?

Traditional materials for the furnace tubes were masonry, metal, ceramic and modern pipe for sandwich oven. The disadvantages of such flues are known, but it is necessary to compare the advantages and disadvantages of various systems chimney:

• Brick chimney. The reliability and functionality of this design is totally dependent on its weight. Therefore, we need a reinforced fundaie under oven. Brick chimney is heavy, which affects its base, in addition requires large investments in the construction and maintenance. Building brick chimney laborious and complex process. Bricks from the effects of changes in temperature crumble and deform over time bricklaying requires repair. Maintenance of such pipes also complicated, due to irregularities on the inner surface chimneyThere begins to accumulate soot and smoke, which must be periodically cleaned;
• Steel tube as a furnace. Again, due to the high thermal loads on the wall, it requires a sufficient thickness, and the thicker the wall is, the harder the product itself. Besides steel, under the effect of temperature, it can burn, and the condensate on its surface can lead to corrode metal, and the subsequent exit of the pipe system. Mounting such a chimney is also complex, requiring use of either a solid product, or apply special connection methods, such as welding. The advantage of such a chimney device is its price;
• Ceramic pipes, products from a mixture of claySubjected to heat treatment, it has a high heat-resistant characteristics, sufficiently well mounted. Durable. The disadvantage - relatively high weight and with metal, low strength characteristics.
• Sandwich chimney. Track structure consisting of separate legkosoedinyaemyh modules. Installation does not require special equipment and expertise. The structure may be displayed in any direction, including horizontal or inclined position. It should be noted, and the simplicity of the device: fasteners and individual modules. Tube furnace sandwich consists of three layers: the inner conduit of the heat resistant steel layer heater and an outer, protective tube. Chimney itself is light enough so it will not cause fixing any problems. The inner surface of the pipe smooth, made of heat resistant alloy steel, which considerably facilitates its purification. Insulation will protect the steel from corrosion and condensation. The outer, protective sheath serves to protect the heater from the external environment.

It is clear that chimneys and flues sandwich structures are slightly more expensive than conventional steel, but over the life service (which is 25 years old) all the costs of composite quite pay off, as opposed to steel, these chimneys do not burn out and does not rust.

Reviews of sandwich pipe for the chimney and sustained in a positive way. Members appreciated the simplicity of design installation, its durability and appearance.

Related article:

Chimneys for gas boiler in a private home. From this review, you will learn: varieties, average prices and features of design choice; rules, requirements for operation and features of the chimney installation, the recommendations of experts.

Dimensions modules sandwich pipe

Pipe Sandwich chimney 115-120 mm in diameter is considered to be the basis for a small country house or villa. heating system in these homes rarely exceed 3.5 kW. For higher power systems (5 kW) applied pipe diameters of 180 mm, for more than 7 kW heating systems use tubes with a diameter of 220 mm. The range of pipe sizes sandwich chimney broad and choose the desired diameter of SNIP norms can be quickly and easily.

When calculating the diameter of the sandwich should not forget about other chimney components: fasteners, clamps, start-sandwich, the damper unit, passages through ceiling or wall.

But, not only the diameter of the sandwich pipe for the chimney has a value that is not less important, and the module height. You need to calculate the length of the chimney, taking into account the outlet pipe above the ridge of the house to a height of 1.5 meters, the height of the pipe exit depends on many factors and it should be selected individually, but the average output length of 0.5-1 meters above the ridge roof. Modules sandwich pipes come in several variants, disseminated: 0.25, 0.5 and 1 meter in height.

Calculator for calculating the minimum diameter sandwich chimney stoves for solid

Is it possible to gather with their hands chimney sandwich?

Assemble sandwich layered with their own hands is possible. This will require a stainless steel pipe, roll mineral heater, The main condition - it is non-combustible. And galvanized steel sheets, which will turn around design, it is necessary to protect the internal parts from external factors.

The main conditions to be complied with, the inner pipe is the heat resistance, high-quality insulation noncombustible materials and reliable fixation of the containment.

Getting to the creation of the pipe for the chimney sandwich with their hands:

1. stainless steel pipe wrapped with mineral wool insulation. Insulation should fit snugly against the inner tube heater should go smoothly, without wrinkles and gaps;
2. Fix the insulation on the pipe or metal wire ties. The mineral wool must be securely fastened to the base;
3. Smoothly and accurately galvanized steel sheet wrap around the resulting structure, the sheet itself fix welding or special attachments for the sheet metal.

The resulting pipe is inferior in quality products prefabricated sandwich, has a shorter life, but, nevertheless, is slightly cheaper.

Often the Internet is recommended to replace the internal passageway of a stainless material, an ordinary steel, but that in no case do not need to, as ordinary steel can not withstand heat and may burn.

Installation of flue pipes sandwich with their hands

Installation of the chimney works better to start from step house design. But there are times when the house is already built, but the chimney must either replace or carry out a new one. What to do in this case? First, let's watch a video, how to install a chimney made of sandwich pipes:

Next, you need to think about how and in what way will be a chimney, it will be displayed to the outside through the wall (which is more convenient in some cases), or should lead him through overlap.

Chimney circuit device of sandwich pipes:

The composition of the chimney sandwich is made like this:

1. The transition from a single-tube furnace on a sandwich, by means of a start-sandwich;
2. The chimney of the ovenTo ceiling or wall;
3. Going sandwich in the ceiling or wall of the house;
4. Mounting base on roofIn the case of withdrawal through the roof, it is flash master;
5. Installation tip.

Once the project plan is made, calculate the length of the system, compiled estimates and purchased the necessary materials, you can begin to installation. Chimney assembly of sandwich pipes is simple and uncomplicated. Enough to treat the surface of the silicone butt-encapsulation and paste the corrugation of one module into the socket of another and the system is ready to cut. Truth is necessary to consider such a moment, that part of the chimney is always possible to collect on the floor and install a ready-made structure that is much more convenient than to build the structure of a single element.

Yourself installation chimney takes relatively little time, takes a much longer time Preparatory work for punching chimney, unfastening and strengthening around the holes, installation fasteners.

Installation of flue pipes in Sandwich bath, In a country house or villa construction is the same, differing only in the material overlap and thermal power equipment.

Installation of the chimney of the sandwich pipe through the roof

Traditional version, which came from the time of brick chimneys. But, nevertheless, relevant in our time. First we need to punch holes in the ceiling and in the roof in place of the chimney outlet. Chimney apparatus of sandwich pipes through roof done by already-established pattern:

1. On oven set start-sandwich transition;
2. To move the next module is connected or ready chimney segment to overlap;
3. The chimney of the sandwich pipe, crossing the overlap. The hole punched through the slab, a special transition set consisting of two plates with a socket therebetween, through which flue is expelled;
4. On the roof in place of the chimney exit flash master set, or conventional base sheet;
5. On the edge of the chimney is installed headroom.

Important! Of particular importance in this case is the alignment of the holes in the roof and in the ceiling. If there is even a small deviation from the vertical, then there may be problems with the chimney.

Installation through the wall of the chimney

In this case, the output of the chimney to the outside wall of the house breaks. This method is more convenient in the sense that during its installation does not need to penetrate the roof and ceiling, thus weakening their structure. Also in this case there is no need to purchase additional items to improve the impermeability roof. Also, this method of installation of the chimney is more convenient to clean it.

Mounting of the chimney pipe through a sandwich wall is made as follows.

1. On the stove is installed start-sandwich, which puts first leg module;
2. By knee connects the knee 45 or 90 degrees, depending on how the chimney will be displayed horizontally or at an angle;
3. Sandwich tube is mounted by the knee and to move through the wall opening for installing the transition is performed in accordance with SNP, at least 0.5 meters from the wall, to the inner metal. Subsequently, after the installation of the transition hole is clogged and a non-combustible mineral insulant closes outside decorative plates;
4. From going outside the house appears pipe at least 0.3-0.5 meters, on the edge wears a tee;
5. Below tee mounted capacitor up output branch pipe, the distance between the fasteners is not greater than 2 meters, and is the most optimal distance between fasteners 1.8-2 meters, the pipe segment can be assembled both on the ground, and then installing and consistently increasing the system and fixing it;
6. At the top of the chimney is set headroom. Flue outlet attached brackets.

Important! Do not install the system in the insulated single-loop products, pipes in the chimney must be of the same type!

Features of the transition from a brick chimney to chimney sandwich

Sometimes there are situations when you need to replace the chimney, built of brick a new chimney. What to do in this situation? There are three ways to resolve this issue.

First, buy in the store ready to transition from a brick chimney on a sandwich. This element is a rectangular metal structure with a pipe for the installation of the chimney. After installation go to the brick base further action on the complexity of the assembly does not represent.

Second Embodiment somewhat complicated, requires considerable time and some skill to work with metal and brick. It is necessary to choose the size of a metal plate ground brick chimney, whereupon make a hole in it and fix it for further installation tube sandwich. Once installed on the brick base plate and fixing its construction sealant and dowels, subsequent installation proceeds as previously described scheme.

The third option is the most difficult to implement, but, nevertheless, has the right to life, in this case, is being built on the site of a brick brick, A small taper upward superstructure, in which the start-sandwich is fixed.

Important! If after installation of the chimney there is condensation in the system, it is worth further insulate its elements.

Prices for a sandwich pipes for flues

Buy a sandwich pipe for the chimney is quite simple, it is not a deficit, and presented in specialized stores in the assortment. However, the acquisition of these products and other items for chimney device, please note that quality certified product will last much longer than the configured technology disorders process. Acquire reinforcement for everything chimney systems must be directly from the manufacturer or its authorized representatives on the market. This ensures long-term service of the chimney and its reliability. In addition to specialty stores and offer a wide range of related products: transitions, end, capacitors, tees and elbows, all you need for a chimney installation.

In order to judge the expensive or cheap, it is worth to evaluate the components of the price of the sandwich pipe factors for chimney made of stainless steel, as well as works on installation of the chimney:

• The material is clear that high-quality stainless steel can not be cheap, however in the case of low prices of goods are likelihood that used low-grade materials, steel, low-grade insulation, resulting in burnout and damage of the elements construction;
• productivity, skilled labor is expensive, whether it is production or installation work, the reason should be taken critically to the unusually low prices on the market, unskilled labor - is substandard welds inaccuracies in size, get enough sleep and poor insulation sealing;

It is clear that the use of cheap labor and low-quality materials when building a house facing alterations.

Briefly on the analysis of prices, the market is insulated products for flue presented in the three leading producers, is the company "Smirnov" NEST and Ferrum. Prices for products they are relatively equal.

sandwich tube

As you can see, the market prices are approximately equal, the technical differences between the products of these brands are minimal.

Cost of installation of chimneys of sandwich pipes vary by region and qualification of installers workers.

Sandwich pipes are robust, easy to use and installation of modular construction materials for chimneys device. The advantages of this chimney: ease of installation, low weight, availability and reliability, in addition to ease of use. Only one drawback - it is the price.