When carrying out plumbing work within a private house, craftsmen mainly use plastic pipes 32 mm in size (cross-section). They differ in a number of positive characteristics. At the same time they have an acceptable cost.
Purpose of water pipes with a diameter of 32 mm
Basically, these elements are used for laying the following systems:
- cold and hot water supply;
- transportation of non-aggressive substances (for steel);
- air supply in air conditioning systems;
- heating of a private house plus a warm floor system (for large objects);
- compressed air supply;
- transportation of gaseous media;
- private irrigation and drainage systems;
- product pipelines in the food industry (polyethylene blue water pipe with a diameter of 32 mm is most often used here);
- as a protective outer screen for cable routing.
Pipes with a cross section of 32 mm are used for water supply if the total length of the system exceeds 30 m
Specifications
Water pipes with a DN of 32 mm are made from different materials. Their technical characteristics depend on this. However, there are a number of unchanged parameters for all types of tubes with the named diameter:
- internal section - 32 mm;
- outer diameter - from 42 to 42.4 mm (in accordance with GOST or European standard);
- wall thickness - from 2 to 2.6 mm;
- flow rate - 50 l / min;
- the length of one unit is from 4 to 15 m (depending on the material of manufacture);
- service life - 30 years (steel), from 50 years (polymers).
The correct choice of tubes according to their cross section allows you to avoid water hammer in the system, as well as turbulence and increased noise.
Materials of manufacture
There are tubes in different designs on the market. The wizard selects the product according to the type of mounted system.
Steel
Metal pipes are used in places where there is a high risk of mechanical impact on communication. Steel - the material is durable, but having a number of disadvantages:
- Tendency to corrosion. The situation can be saved by galvanizing. But if the protective layer is damaged, rust cannot be avoided over time, especially if aggressive media move along the highway.
- The complexity of installing the line. For the device of a steel pipeline, welding must be used.
- Siltation of the highway with time. Steel pipes tend to overgrow with garbage, polyps from the inside. This reduces the internal clearance of the highway.
Steel has an impressive mass, so transporting and stacking such elements alone is not easy.
Polypropylene
One of the most common materials for the production of water pipes is polypropylene. For each section, you can choose products for the nominal pressure in the system. Such data is marked with the letters PN. For example, if the product has a PN10 value, then the tube can be used for communication with a working pressure of 10 atmospheres. Polypropylene has the following advantages:
- inertness to any, even aggressive environments;
- good linear tensile strength;
- the ability to work with high and low temperatures;
- smooth inner surface;
- light weight;
- ease of installation;
- reasonable price.
Polypropylene is afraid of ultraviolet radiation, so the pipes are laid either inside the building or in the ground.
PVC
PVC water pipes with a diameter of 32 mm can be used in systems with temperatures up to +90 degrees. Moreover, the permissible range of operating pressure in the line for these products is 6-46 atm. Among the advantages of PVC are:
- Fire resistance. Due to this quality, polyvinyl chloride tubes are popular in the installation of a protective casing for cable wiring.
- Light weight.
- A smooth inner wall allows media to easily travel along the highway to their destination.
Installation of PVC pipes can be mastered even by a novice master.
Metal plastic
This type of tube has a multilayer structure consisting of a reinforcing foil layer and a polymer. Each of them is firmly welded / glued. As a result, plastic has a number of features:
- inertness to corrosion;
- the possibility of using products at sub-zero temperatures;
- stability of the working pressure in the line due to the perfect smoothness of the inner walls;
- lack of strong polymer expansion under the influence of high temperatures;
- ductility of tubes (easy to bend, which makes it possible to mount communication without a large number of fittings);
- inertness to aggressive environments;
- low thermal conductivity;
- lack of conductivity of stray currents;
- external aesthetics and environmental safety.
More often for the installation of heating systems or underfloor heating, Rehau plastic pipes are used.
Polyethylene
This material can be further divided into categories:
- HDPE (low pressure polyethylene).
- LDPE (high pressure polyethylene);
- crosslinked PET.
Since all types of polyethylene tubes (except for cross-linked ones) do not respond well to high temperatures, they are used for cold water supply or sewer. Polyethylene is distinguished by such features:
- resistance to aggressive environments;
- excellent dielectricity;
- maintaining healthy sanitary indicators of drinking water;
- frost resistance and moderate heat resistance due to the ability to linear expansion.
PET pipes are easy to install, have an affordable cost.
Criterias of choice
The selection of pipes with a cross section of 32 mm is carried out according to the following criteria:
- Type of product material. For internal laying of the highway, PVC, polypropylene, and metal-plastic are optimal. For external - steel, PET.
- The purpose of the pipes. On each product there is a marking on working pressure, optimum temperature indicators (hot & cold).
- The principle of installation. Each master selects the type of pipe with which they will cope independently.
- The presence of reinforcement (when installing heating and heating systems).
- Resistance of the material to temperature differences (if it is supposed to transport media with different indicators).
In addition, you need to pay attention to the period of operation, the cost of products and the manufacturer. Here, each has its own requirements and capabilities.
Mounting Features
Each type of tube requires a specific approach when docking. The device of the lines is as follows:
- Polyethylene pipes are joined using a welded joint, an electrofusion coupling or a compression clamping fitting. The method is selected depending on the purpose of the line and on the skills of the master.
- Steel is joined by welding.
- Polypropylene pipes require only soldering using a special apparatus. Pipes and fittings are slightly melted on the tips of the soldering iron and then joined. The cured polymer forms a strong bond.
- Plastic can be mounted using threaded or press fittings. For the device of the trunk of metal-plastic, a special tool is needed. In order not to splurge on an expensive purchase, you can rent it.
- PVC tubes are connected to the socket using special rubber cuffs. Pre-sealing gasket is treated with sealant.
The wide part of the bell should look in the direction of flow of the transported medium.
Cost of water pipes
Prices per meter of HDPE water pipe with a diameter of 32 mm and other products with the same cross section:
- steel - from 45 rubles;
- polypropylene - from 67 rubles;
- Gray PVC (Ecoplast) - from 32 rubles;
- metal-plastic pipes - from 159 rubles;
- HDPE pipes are black - from 14.8 rubles (while Jileks products cost from 76 rubles);
- LDPE pipes - from 20 rubles.
The cost for all types of products is quite acceptable, especially if there is an installation of a not very long highway on a private site.
