Polypropylene pipes : dimensions, diameters and designation

diameter calculation

Standard designation pipe diameter is as follows:

• Inner diameter - the main characteristic of tubes and parts for connection (fittings);
• External - small size are in the range of 5-102 mm, average - 102-406 mm long - 406 mm or more.
• Conditional - the nominal size of the internal diameter.It is believed in millimeters or inches rounded;
• nominal diameter of the pipe;
• wall thickness.

on the market represented a huge range of different pipes, so there are regulations that allow clearly identify the type of each product.For use in the home it is very important to know all the features of diameters.For example, if in a private home heating system replacement of the exact size needed for the system gave uniform heating throughout the room.

inner diameter polypropylene pipes can be calculated independently.This skill allows you to create a true heating system project.It is calculated according to the formula: d = sqrt ((314hQ) (vhdT)) where:

• d - internal dimension;
• Q - heat flow, kW;
• V - velocity of the coolant, m / s;
• dT - Temperature range;
• sqrt - square root.

Note!If you do your own calculations you can not or you are not confident in their abilities, consult a specialist.

Properties

pipes Polypropylene pipes manufactured in the size of 25, 63, 90 mm and so on.Polypropylene pipes of large diameter, 110 mm is needed in the workplace.Articles 63 mm in diameter are needed for transport of aggressive chemicals.This kind of production is indispensable in which compressed air is used systems.

pipes 25 th and 63 th the size of the boiler connected to the system, the odds on the floors and serve as a method of connecting individual radiators to the general system.Also, they are needed for the installation of underfloor heating.Polypropylene pipes are made single-layer and multilayer.Larger sizes are made from a homopolymer, random copolymer or block copolymer.Such a material has the following advantages:

• absolute tightness;
• Long service life up to 50 years;
• not exposed to corrosion and weathering.

Polypropylene is a reliable, durable, with low-cost material.For hardening commonly used reinforcement. This is done by creating a structure of many layers, made possible thanks to the additional aluminum layer .Often these five layers: two layers of polypropylene, aluminum, between which is connected to two layers of plastic adhesive (adhesive).aluminum layer thickness varies in the range 0.1-0.5 mm.

application features

length polypropylene pipes is four meters, the installation they are not bent.A tube connected between the special coupling using welding fittings.Fittings have a metal thread for fixing the unit.The quality of welded joints can be successfully used in the compressed air pipe system.Under the influence of temperature, they can change their length considerably.If the article is longer than ten meters, it uses special flexible joints temperature.

to select the desired pipe you need to know the size of the internal polypropylene pipe to calculate the allowable pressure and temperature.Understand and change the version of the linear dimensions of the heat.If this factor is ignored, it may cause destruction of the pipeline.

Note!It is important that the system was not rigid fixation, and the ignition gaps are provided.