Transportation of town gas through pipes we already knew a hundred years ago, when they were pipes

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Pipelines can be classified and divided in different ways. First, they can be divided into plastic and metal, in this paper we will confine ourselves to the plastic. These are corrosion-resistant, strong, tough, while it is possible to easily vtunnel merge the field.
When we divide pipe systems for public supply vtunnel pipes (gas, water supply and pressure or vacuum sewage), to piping systems for industrial and domestic installations. Pipelines for public infrastructure are primarily buried, so material must be corrosion-resistant, sturdy, tough, vtunnel coupling system must be reliable so that it can be implemented on the ground.
Pipelines for the industry are normally visible and must be resistant to various vtunnel kinds of industrial water or against various (chemical) media are also important valves and other control valves which are to be integrated into these systems. It is also important to know the temperature of the liquid, which is transported, whereas the plastic piping at elevated temperatures usually softened.
Some pipes should be wholesome food or bacteriologically pure, they will be used for the sterile liquid. Due to the different requirements already in the project should be to choose the correct type of pipeline, consider vtunnel the purpose for which the pipeline is built, and the easiest method vtunnel of construction (gluing, welding, mechanical joining) and repair, dissemination, and the like.
Transportation of town gas through pipes we already knew a hundred years ago, when they were pipes and pipe components made from iron, welded or screwed. With the advent of natural gas has interest vtunnel in gas rose sharply, iron pipes were shown to be unreliable, especially in places with a lot of stray currents, which rapidly vtunnel corrode iron pipes.
Therefore, the early develop new (plastic) materials, which were more resistant to corrosion and chemical media. First came on the market of PVC pipe system, these tubes are placed a few in Ljubljana and gradually replaced after 50 years of operation.
A little later he developed a polyethylene or popular alkaten, which is much gibkejši of PVC and can be welded, so it is suitable for laying in the ground. New types of polyethylene have been rapidly developed, fundamental characteristics are still the same: polyethylene pipes today are of such quality that proved to be expected vtunnel lifespan of at least 100 years.
The most common type PE100 is standardized for pressures up to 10 bar, 16 bar gas and water. For this pressure stage are also available in all tubular elements, so that the implementation into practice quick and favorable. Pipes made of polyethylene, which is still used today, are the most tested just in buried pipelines.
Safety of polyethylene pipeline is provided with standards that define dimensions of the pipe, jointing and testing procedures. Manufacturers of pipes and pipe elements, to verify compliance with the standards of the delivered elements, but you can also request a certificate vtunnel of examination in an approved laboratory. It is also important training welders who have knowledge regularly vtunnel updated and can attest to the professional examinations.
The quality of welding helps to control automated welding vtunnel equipment, which is equipped with computer support and all welding parameters stored in the memory unit. The gas pipelines in accordance with standard safety factor also depends on the seismic hazard and traffic, so in densely populated areas, the gas pressure vtunnel in the pipeline accordingly reduces, in sparsely populated areas is higher.
Quality of polyethylene piping for gas is so good that in the world today for the construction of distribution vtunnel networks up to 10 bar is not used by any other material, especially in areas that are most at risk from earthquakes. Japan, for example, after the earthquake in Kobe introduced a complete replacement vtunnel of iron gas pipelines with polyethylene.
Plumbing fixtures are older than the gas and very diverse, sometimes creepy already outdated and obsolete. The museums are stored vtunnel samples of old wood, stone, ceramic and lead pipes are still in use a lot of old ceramic, cast iron, salonite and iron pipes, aging is also some plastic pipes made of PVC and polyethylene. We can say that in Slovenia the slow reconstruction of water supply systems, as well as better-maintained water distribution networks, water leakage exceeds 30 per cent, while in many areas flow into the soil covered more than half of the drinking water.
Pipelines are homogeneously welded, have smooth inner walls are clean and have no sediment. In addition, the carbon footprint of the meter tube of polyethylene 20 times less than a meter of iron or ductility, even though the polyethylene is made from fossil fuels.
Contemporary polyethylene pipes which comply with applicable vtunnel European standards today are manufactured in Slovenia, so it makes sense more effort in planning to focus on this subject