Build Daily


August 12, 2017 18:05

How to choose the diameter of the pipe to heat your home - the table and calculations

Calculate optimal professional section of the pipeline is simple.Practical experience + special tables - just enough to make the right decision.But what about the ordinary home owner?After all, many people prefer to mount the heating circuit on their own, but it does not have the profile of engineering education.This article will be a good hint for those who need to determine the diameter of the pipe for heating private houses.

there are some nuances that need to pay attention:

  • Firstly, all the data obtained on the basis of calculations according to the formulas - approximate.Various rounding values ​​averaged coefficients - all this makes a number of amendments to the final result.
  • Secondly, the specific operation of any heating circuit has its own characteristics, so any calculations give only approximate data, "in all cases".
  • Third, pipe products are manufactured in a certain range.The same applies to diameters.The corresponding values ​​are arranged in a specific row on a gradation value.Therefore it is necessary to select the denomination closest to the settlement.

Based on the foregoing, it is advisable to take advantage of the practical advice of professionals.


All Doo - in "mm".In parentheses - for systems with natural circulation of coolant.

  • total pipe line - 20 (25).
  • bends to the batteries - 15 (20).
  • otopleniya- diameter of 25 (32) In single-pipe circuit.

But this general parameters circuit, not taking into account its specificity.More accurate values ​​reflected in the table.

d - 1

What is taken into account when selecting the diameter of the pipe

power of the heat generator. It is taken as a basis and is determined individually for each building.At that the owner is guided by purchasing the boiler?On total area of ​​all heated premises.It is sure to ask the manager at the point of sale, if the buyer has any questions regarding this item.

Note!It is considered that to provide excellent heat the house must adhere to the following ratio - 1 m2 / 0.1 kW.But if you take into account the peculiarities of the climate, gentle machine operation (not to "drive" it to the limit), you should add about 30%.It turns out - 1 / 1.3.

D 2_ coolant speed. If it is less than 0.25 m / s, there is a risk zavozdushnivaniya, education congestion on the road.The excess value of 1.5 is fraught with "noise" in the line.This is especially noticeable when the metal pipe, and even laid open way.But in any case, the movement of the coolant circuit will be good audition.

prove in practice that should be guided by the index in the range of 0.3 to 0.7 for the private buildings (self-heating circuit).This optimum value for any system.

circuit configuration. in private homes during installation, as a rule (irrespective of the scheme), all the "threads" plant collector.Each "loaded" for a certain number of radiators.It makes no sense to buy a pipe of the same diameter for all the lines, taking into account that the larger the cross-section of the workpiece, the higher the price of 1 rm

diameter pipe.Outdoor is not critical, since the products of different materials there are differences in the wall thickness.This option shows only the convenience of fastening products.The inner diameter - about the throughput capacity of the track.That he is decisive.

Note!Accepted average handle of the cross section value (nominal sizes).It is this option and is used in the calculations.

diameters of pipes are usually denoted in inches.For us it is unusual (non-metric) system, so you should know the rules of transfer values.Value centimeter inch to - ½, 54 (or 25.4 mm).Pipe material - plastic, steel, PP, PE.

structure Specificity. This primarily refers to the efficiency of its thermal insulation - materials from which it is mounted, by what technique and so on.

Practical recommendations

  • wrong choice is fraught with diameters of products with many troubles: leaks (due to hydrodynamic impacts or excess line pressure), increased consumption of e / energy (fuel) due to the low efficiency of the system and a number of others.Therefore, mount it on an "as a neighbor (godmother, a relative)" should not be.
  • If the contour consists of a heterogeneous tubes, the special calculations will have to do for each section (line) line.Separately - for plastic, metal (steel, copper), to apply different rates and so on.To solve this problem can only be a specialist.In such situations, it is not necessary to engage in their own calculations, since the error can be quite significant.professional services will cost much cheaper than the subsequent alteration of communications, and even in the cold season.
  • Connecting all devices (expansion tank, battery and other) circuit pipes made of one section.

Dr. z_

To eliminate air pockets (in the case of some errors in the calculations) on each line should be installed so-called air vent.