Metal heating pipes : the recommendation and price

Types of metal pipes for heating

appearance on the market of products tehnologichnyhmetalloplastikovyh pipeline equipment slightly decreased demand for steel heating pipes, however, to completely abandon their use in heating networks, the construction industry is not ready and does not intend to.And there are a number of reasons.

In heating networks traditionally (sometimes not at all) used the following metal tube design, each of which, as usual, has its advantages and disadvantages:

• ordinary (black) steel;
• steel products galvanized;
• stainless steel;
• copper pipes (requires a separate discussion);
• metal and plastic products.

Any position requires a separate and thorough discussion, in this paper we consider only the characteristics of steel metal pipes for heating, which can be purchased at any hardware store.According to the method of manufacture, oredelyayuschemu performance of the pipeline, they can be subdivided into three groups:

• electrically - produced by welding curved plates;
• seamless - produced by pressing and forging;
• alloy - produced by the method of casting using special equipment.

characteristics and features of assembly

For all steel pipes are characterized by the general positive properties that allow them to compete successfully with other metals.

• relatively low price (stainless steel stands alone, but even it is cheaper than copper);
• high mechanical strength, ensuring reliable operation of the heating system at a standard operating pressure and hydraulic shocks;
• easy installation of heating circuits of steel pipes.

now detail for each item.

1. Black (gray) steel .Corrosion properties - the main problem of the structural material.Experience Soviet-era confirmed that welded pipes as per GOST 3262-75 actually practiced resource in 25 years.Aggressive fraction of coolant and preventive plums from the circulation circuit (oxygen ingress of air) rapidly destroys the internal surface of the tube and narrowed the operating section.Hydraulic breaks on the fittings and stagnant zones limit the service life of piping systems.A big plus: the low price and easy installation of black steel tubes for heating.Any suitable types of welding equipment and screw connections.
2. Galvanizing .Insulation of internal and external surfaces of a thin zinc amalgam significantly slows the corrosion process (internal and external).The service life of the heating wiring is extended significantly.Initially such metal pipes intended for gas and water supply networks, but also in the heating circuits have become a reasonable alternative "chernyashki".Price per meter slightly above the metal-plastic (for d = 20, respectively, 102 and 92 rubles. Per running meter) with a wall thickness of 2.8 and 2.0 mm.Certain difficulties may cause self-laying and dismantling of pipeline heating galvanized steel, a large number of threaded connections on the tap, branching and junctions, but it's worth it.

stainless steel heating pipe

deserve a separate discussion.Plus obvious: they are virtually all inert aggressive chemical compounds present in the air and the coolant.But the performance of welded or seamless metal tubes are hardly used in heating systems.The reason is simple - the price.So, this meter tube 20h2,0 costs about 250, comparable with the parameters discussed above examples 20h3,0 - already 440 rubles.In an apartment building, no developer will not dare to establish such a tube wiring.

For private houses with central heating too expensive, but there is a modern alternative solution: corrugated stainless steel pipe, the most suitable for self-wiring.

• high corrosion resistance is preserved;
• plasticity and flexibility of the structure provided;
• pipe laying easier: compression fittings with heat-resistant silicone seals tightened a simple pipe wrench;
• price two times lower than that of smooth pipes;
• working pressure of 10.8 atm is superfluous for autonomous networks.

Making a choice between plastic and metal heating circuits, be sure to remember the classic steel tubes, they still too early to write off the historical dustbin.