Gas plastic pipes
Thinking about how best to bring gas to a private house or make wiring in the yard, take care of choosing modern pipes.
Previously, they were made of metal, and with the development of advanced technologies, a safe gas pipeline is laid from pipes made of inexpensive, reliable material.
Special plastic pipes for the transportation of combustible gases are used in industrial production, public utilities and the domestic sector by individuals. A characteristic feature of the exterior design is black with a longitudinal bright yellow stripe.which does not allow to confuse products with similar products that have a different purpose.
Advantages of gas plastic pipes
- long service life;
- wear resistance;
- light weight;
- simple installation:
- economical consumption of installation materials, because the products are produced in long lengths or multi-meter bays;
- welding speed;
- the possibility of reuse;
- easy disposal;
- safety of use (the material is non-toxic);
Plastic pipes are gradually replacing steel and cast iron products that are used to lay a gas pipeline. Metal products are mainly used at industrial facilities and in old public utilities, as well as when laying large gas transmission systems that distill thousands of cubic meters of raw materials.
Benefits for small flue structureswhich characterize polymers:
- the ability to last longer without losing their qualities;
- non-conductivity of electric current;
- resistance to corrosion;
- ease of assembly without the use of complex equipment;
- resistance to aggressive environments;
- water and noise resistance;
- compliance with international safety standards;
- high permeability, due to the smooth inner surface, does not allow solid particles that have entered the system to settle;
- environmental friendliness, guaranteeing the integrity of the environment and human health;
- light weight speeds up installation;
- low cost compared to products made of metal;
- the possibility of quick replacement, which is important for the urgent restoration of supply to residential buildings and industrial facilities;
Able to transport liquids and gases to the required distances without unnecessary losses. Therefore, they are successfully used in production and in public utilities. Aesthetic appearance and sound insulation make polymers suitable for urban or crowded areas.
Types of gas plastic pipes
It is important to consider the properties of the material:
- polyvinyl chloride (PVC)
- polyethylene;
- metal-polymer products;
- polypropylene;
PVC – a common material that is valued for its affordable cost and ease of mounting systems in rooms. The disadvantage is that during chemical decomposition, PVC releases a toxic substance – chlorethylene.
Therefore, the use of this material is only permissible for laying highways in open areas underground.
Polyethylene – this is an advantageous option for cold transportation of gases and liquids in a private household or in production. Affordability contributes to the mass use of polyethylene pipes among the population.
It is worth taking care of their isolation. When operating without insulation, the strength and solidity of the product are quickly lost, and the likelihood of leakage increases.
Polyethylene has much less frost resistance than other materials. Therefore, it is better to create a highway in an open area with their help underground, and to produce a supply to the building by passing plastic products through metal pipes or using steel adapters.
Metal-polymer differ in that the polyethylene layer is located in reliable isolation. Resistant to adverse factors from the outside, including mechanical damage. They cost an order of magnitude more expensive than pipes made of other materials, however, they are very reliable in operation.
They are easy to give the desired shape, which facilitates the installation and installation of equipment. Metal-plastic products bend effortlessly, taking the desired position. They are connected to each other using crimp or pressed fittings.
Polypropylene Designed for transporting gas in open areas. Low chemical activity does not allow it to deform and change its quality characteristics. Polypropylene does not need additional insulation, as it is resistant to ultraviolet radiation and temperature fluctuations.
It is considered a gas-permeable material, so it cannot be used for wiring inside buildings.
Installation
Flexibility contributes to their hidden gasket, which protects against the negative effects of ultraviolet radiation, excessive thermal expansion and maintains the integrity of products. To prevent leakage, avoid unnecessary connections by using multi-meter coils of flexible polymer pipes.
Numerous joints increase the cost of laying the highway and lengthen the operation. It is important to use the same type of materials during installation. This approach helps to avoid the appearance of cracks and other mechanical damage that occurs due to the heterogeneity of the structure.
Special tools and technologies that are used for welding plastic pipes significantly speed up the creation of a gas pipeline.
Three methods for welding polymer products:
- electrofusion welding is carried out by melting plastic due to the thermal effect of electric current on the fitting. This is an economical and efficient way, however, for its use in remote places, you need to have a mobile source of electricity;
- socket welding used to connect polymer products in sewer systems and connections;
- butt welding using a special soldering iron is the most used option for creating a reliable connection of polymer products.
Metal-plastic pipes, which have a low coefficient of thermal expansion, deserve special attention. This makes them ideal for concealed wiring inside building walls or for private household gas to a summer kitchen, outbuilding or guest house.
Installation of metal-plastic is carried out exclusively by press fittings, tightly crimped with special tools. It is important to remember that installation must be carried out by qualified personnel who are familiar with safety, material characteristics and work features.
To shut off the gas supply, special shut-off valves are used. Their work is carried out using a key or manually. Shut-off valves do not require additional sealing, as precisely fitted parts are tightly connected to each other.
In basements, the system must be open, and installation must be carried out with a mandatory gap between pipes and walls. The places of passage in the walls and ceilings are closed with special additional protection.
When starting to connect gas heating appliances or a stove, take care of the high-quality and quick removal of combustion products from the ventilation system from the living space. To do this, select the appropriate size of the ventilation duct.
Installation of the hood is carried out on load-bearing walls or partitions, which are made of non-combustible materials. To prevent the appearance of condensation on the outside of the wall, the room is insulated.
Installation of appliances without connection to chimney channels is carried out where each burner accounts for about five square meters of free space. For a small water heater, you need at least six meters, and a bathroom column is placed on an area of approximately equal to ten square meters.
If in the room where the stove or water heating system is installed, there is no space necessary to ensure full access to air, then a ventilation outlet must be built from above.
Considering the fact that gas stoves, heaters and water heating devices use oxygenated air for combustion, it is important to ensure that it is freely available in the room through ventilation. For this purpose, a narrow gap is created between the door to the kitchen or in another room and the floor surface.
All devices must be equipped with taps to shut off the gas supply. Installation of heaters and gas stoves is preferably carried out with the hood turned on or ventilation running. During installation, the tightness of the pipes is violated, therefore, at the end of the creation of the gas supply system, it is necessary to check their integrity.
It is important to take into account some features of the materials and the area where the work is planned. Polymers are susceptible to chlorine, heat and ultraviolet radiation. As a result of heating, they release hydrochloric acid, which causes chemical burns on contact.
Therefore, plastic products are isolated with special materials, and gas pipelines in open areas are located underground. The laying of underground lines is necessarily carried out with insulation. It is forbidden to place lines in concrete structures and poorly ventilated galleries, since the accumulation of gas due to leakage can cause a violent explosion.
For hidden laying, it is imperative to take into account the coefficient of thermal expansion of polymers, leaving free space for this and equipping pipes with soft thermal insulation. For wiring in residential, working, industrial and other premises, it is recommended to use polyethylene pipes. This material, like its analogues, is marked with a yellow longitudinal stripe.
Polyethylene does not enter into a chemical reaction with household gas and is not subject to chemical influence from the outside. Being the main material for the interior of metal-plastic pipes, it makes it possible to use them for gas distribution in residential, industrial or commercial buildings.
When choosing plastic pipes for creating gas wiring, you must definitely pay attention to the quality of workmanship and the manufacturer. Reputation-conscious manufacturers guarantee a long product life and offer the option of exchanging defective products or returning them for a refund.
When making a purchase, the accompanying papers must be stamped and signed by the seller, and a warranty card must be present with the purchase.
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