Very convenient and rational is the use of PEX pipes for drinking water. Plumbing PEX pipe is incredibly popular, due to the fact that the inside of PEX pipe perfectly smooth, and it allows water to move quickly on them without turbulence. Also PEX tubing are different security-enhanced and water PEX tubing are clean with parameters corresponding to all the requirements of modern standards, which pushes the choice is PEX tubing.
Pressure PEX tubing are also widely used by industry. Pressure PEX tubing are designed to pressure from 4 to 20 atm. As the pressure pipes most commonly used: gas pipes, plastic pressure for cold water, drain PEX pipes and insulated pipes PEX-AL-PEX.
PEX pipe
PEX tubing for drinking water
PEX Pipes – purpose and dignity
Now widely adopted pipes modern environmentally friendly materials – PEX.
What are the advantages of these Plumbing PEX pipes?
They are simple, quick and clean to install, resistant to acids and alkalis, does not corrode, they can be “zamonolichivat” into the wall, have an absolute tightness of joints, low cost, and for heat resistance superior to any other PEX tubing.
However, pipes made of PEX yield on frost resistance of PEX tubing. Already at a temperature of -5 to -15 * C PEX becomes brittle, so for outdoor water use them can not. PEX pipe and PEX fittings used in residential and industrial buildings for domestic hot and cold water, as well as the device underfloor heating. Because of its smooth inner surface, they have high permeability. PEX fittings are manufactured from special chrome-plated brass pipe PEX fittings from PEX, so they can be easily connected with stainless steel PEX plumbing.
Operating temperature pipe to +95 * C.
Operating pressure for the cold PEX plumbing pipes 1,0 MPa, and the hot – 2,0 MPa.
Life with preservation of the original qualities of 25 years for pipes and PEX fittings and hot water 50 years – for the cold.
Thus, choosing PEX tubing, you get a cost-effective, hygienic, reliable and durable water system.
Plumbing services in Canada
Plumbing services in Canada and plumbing services plumbing call Toronto. We carry such plumbing work such as connection and replacement of plumbing fixtures and appliances, installation of household appliances, installation and connection to the adverse communication in the apartment, washing machine connection, installing a washing machine, installing toilets, fixed shower, dishwasher installation, installation of sinks, installing a bathroom, installing faucet. Installation of water - PEX pipe, installation of metal pipes installation of filters. Installing radiators, heated towel rails and installation of other work.
PEX pipe for outdoor transportation
Outdoor PEX pipe according to the Canadian climatic conditions and specific processes of large industrial enterprises rather acute problem of transport of aggressive media on the open air.
Typically, external transport requires the discharge of media from the railway or trucks, or when interplant transfer media. In any case, the length of these pipelines is high enough. Traditionally, in these cases, use metal pipes, which quickly break down, and corrosion are both external and internal surface of pipelines.
For external use pipelines must possess not only resistance to aggressive media, but also to withstand the harsh climatic conditions, when the temperature difference can reach over 70 ° C (-35 ° C and lower in winter to +30-35 ° C in summer).
Pressure loss in PEX pipes made of polymer materials
In bold denote the speed of the flow in m / s (should be within 1 to 2 m / s), the usual – head loss in m to 100 m straight PEX pipe
* Table is based on the diagram G. Lang.
Roughness: R = 0,01 mm
Water temperature: t = 10 C
As already mentioned, an important point in selecting the downhole pump is the choice of the membrane tank. Its main purpose – to ensure the normal operation of the pump in the automatic mode. This means that the leakage in the system and low water consumption will not lead to too frequent on-off unit. In addition, the accumulator compensates for pressure shocks in the system. Similarly, to calculate the required amount of membrane tank can be as follows:
Where Qmax – maximum pump flow, m3 / h;
Pset – the pump pressure, bar;
P – the difference between the pressure on / off bar;
Nmax – allowed number of on / off per hour;
k – 0,9.
To illustrate the calculation will give an example:
The two-storey country house, the following consumers of water: The ground floor – sink and a bathroom (toilet, washbasin and shower), on the second floor – toilet with washbasin. The house is a filter for water. At passport data of pressure loss in the filter are 1 bar.
In the area drilled. Her passport options:
- Output – 5 m3 / h;
- Static level – 25 m;
- The dynamic level – 30 m;
- The top mark of filter area – 45 m;
- Lower mark – 50 m;
- Depth of wells – 60 m;
- Mounting Depth Pump – 40 m;
- Diameter of the hole – 121 mm.
There are the following geometric parameters piping system:
- Diameter pressure pipe in the hole – 40,0 mm;
- Length of pressure pipe in the hole – 40 m;
- Diameter pressure pipe from the wellhead to the house – 32 mm;
- Length of pressure pipe from the wellhead to the house – 20 meters – a mark the highest point of water pumping – 3 m;
- Pipe material – polyethylene.
So, using the already well-known formulas, we obtain:
1.Maksimalny consumption
Qmax = 0,2 + 0,1 + 0,1 + 0,2 + 0,1 + 0,1 = 0,8 l / s or 3 m 3 / h
2.Trebuemy pressure
Ptap = 2 bar
> Hgeo = 30 + 3 = 33 m
Hf = Hd + Nmes + NF
Where Hg – the head losses along the pipeline,
Nmes – pressure loss in local resistance
NF – pressure loss in the filter.
Using Table 2, counting the loss in length:
To calculate take losses on the local resistance is equal to 15% of the losses along the length.
Nmes = 4,12 * 0,15 = 0,6 m
Nf = 10 m – the loss of the filter (1 bar is 10 m water column),
Hf = 4,1 + 0,6 + 10 = 14,7 m
Thus, the calculated total pressure is equal to:
H = 2 * 10.2 + 33 + 14.7 = 68.1 m
So, on the calculated parameters we choose the catalog pump GRUNDFOS SQ 3-65. Then proceed to the calculation of the membrane tank.
Qmax = 3 m3 / h;
Pset = 3 bar;
P = 1 bar;
Nmax = 100 (because the pumps SQ / SQE have smooth acceleration and have no restrictions on the number of inclusions, for calculations take Nmax of 100).
Thus, the volume of the membrane tank is 8.3 liters.
Of course, that by itself the pump will not work. For normal operation should provide a set of necessary supplies. First of all, already referred to the estimated volume of the membrane tank, an electronic control unit, an analog pressure sensor (to our pumps to a range of 0-6 bar, 4-20 mA), pressure gauge, cable, heat-shrinkable cable box, cable, stainless steel ( to hang the pump in the well), stainless steel clamps, 2 pieces per eyelet clamps to attach the cable to the pressure pipe, pressure pipe, adapter “pipe-pump”. Supplies can be purchased separately or bundled with a pump.
Note that for the normal and safe operation of the pump requires electricity to the power input cable suitable for the power unit.