Pipes that aren’t visible on the surface and are laid under the surface are called underground pipes. They are usually laid at least 18” or 5” under the surface. The type of material used for underground pipes is usually concrete however PVC pipes are also used. There are different types of pipes available depending upon their use. These pipes are used to convey substances that can flow.
Underground piping is usually done in a densely populated area, where there isn’t a space to waste by installing these pipes on surface. The two factors due to which the underground piping is preferred is that, it reduces the chance of the damage to the pipes by the people, and secondly, the space isn’t wasted at all, as with underground pipes, one can build up buildings or roads etc, without any problem. However to install the underground pipes some things have to be considered, like the place where the digging is going to take place and where the pipes are going to be placed is a vacant place and there aren’t any other pipelines already present there, then it had to be made sure that the pipes are strong enough, and that they can tolerate pressure of the soil on them. Next thing, the type of pipes needed should also be checked properly to make sure that a wrong type of pipe isn’t being installed. Then there is a need to make sure that all the joints have been securely tightened and all the end have been joined tightly to prevent leakage in future and causing problems.
The most significant use of underground pipelines is the transportation of oil, gas and sewage. Water is also supplied via underground pipes in the city, or over long distances, but mostly the oil and gas companies use these pipelines to transfer the petrol or gas that they produce. These pipes are used as they are the safest way to transfer the petrol and gas, if the trucks or railcars were use, they would pose a greater threat to the people and the environment. These pipelines are constructed of welded steel pipe and are coated and protected to reduce corrosion (rust). Sewage system is then the second largest system that is made up of these underground pipes. These pipes collect all the sewage and then take them to the treating plant located at some distance from the city. Thus these underground pipes play an important role.
Underground pipes maybe very useful for the society, still the cost to maintain them is very high. And if somehow some leakage occurs at some point then the repairing is quite a long process. Underground piping is also done in houses, suppose a pipe leaks, and if it is not repaired then the house will be damaged, mostly to repair the pipes, the floor have to be peeled away or if its concrete then it has to be jack hammered away before the repairing could take place. Same way, if a pipe leaks under the street or some building, then to repair it a hole has to be dig up, only then can these pipes be repaired, which is quite expensive and time consuming job.
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