And the third group – this is the end buyer who is interested in only one, so that the pipe line with its technical parameters and did not exceed its price barrier. In most cases, ad sales b / a pipe in addition to diameter, wall thickness, type of pipe, indicate which product is transported by pipeline to its dismantling. Basically if it's out of the tube: gas, oil, water and light oil. What about the tunnel, knowing how it was used? Gas pipe from the gas pipe relatively clean inside. Outside "Gazovka" (pipe from the gas), mostly in the film insulation, bitumen is sometimes found, not rarely in roof insulation can occur corrosion.
Bitumen coating is removed easily. Removing the insulation film is much more difficult, but the quality of the surface under the film is usually better than asphalt. Pipe from the gas is mostly electric and seamless pipes. Electrically large-diameter pipes, it is mainly the pipe from the main gas. This type of pipe running under huge operational pressure. GOST 20295 and TS provides a low-alloy steel, which provide protection against aggressive environment.
Oil pipe insulation in the main oil pipelines. Before removing the pipe from the remnants of washed necessarily oil. Yet what then remains of oil remain. Sometimes the market b / y pipe meets the pipe without being washed. Pipe after oil require mandatory internal cleaning, which can not affect the cost of recovery b / y pipe. "Oil Industry" is usually worth estimated at 1-2 thousand cheaper 'Gazovki. " After purification (recovery pipe) quality "oil industry" may be better treated "Gazovki." WATER pipe from the water is often found in the bitumen insulation, the insulation often encountered severe corrosion up to cutting. The inner surface of the pipe has a large bowl. This is mainly because of the pipe under reclamation. It should be generally low in the ratio of price – quality. Used mainly for driving, carrying cases, covers, etc. Light oil products pipe in quality is better "oil industry" and as a result more expensive. Diesel fuel, gasoline, etc. PAR The pipe from hot water and heating. Sometimes you may come across rather good pipe. Stale pipes with "stale" decided to take the pipe from storage. That is, the pipe was in stock. Not used or processed. Stale pipe includes a certificate of existence, but as Typically it is missing, or forged. Stale pipe is much cheaper than new, but expensive and restored. Even if you are offered a pipe from the gas, it does not mean that the whole tube in the party of "good" quality on a single pipe can even keep the default label, and another may be covered with corrosion. It depends on many factors: what the product was transported through the pipe, on how aggressive environment, how many years operated the pipeline, the impact of condensed water, etc. Plus everything else the quality of removal. Since You can not uncommon to see a picture when the pipe is dismantled with the help of an excavator (and poking around and lifted by bucket) here and "bananas" and dents provided. From all the above we can conclude that the initial use of the pipe does not give a complete picture of its condition, pipe inspection in the living will greatly increase the chances that the tube is really desired quality, and only after sandblasting the pipe, it will be possible to make a definitive conclusion, a quality pipe.
