During the construction of civilian and industrial facilities, steel bounces, special pipes, serving as a component of the branch of pipelines in different directions are used. There are several types of them, each of them should be considered in more detail.
Electric welding. They have special heating elements made of wire in their design. Such bounces are made by welding, so their use is limited. Today they are used mainly for hot water supply. Among the advantages, quite cheap production can be noted, as well as the simplicity of installation. But they have one significant minus that blocks all the advantages – they have welds, which is not a virtue for the water supply. With a sharp drop in pressure and temperatures, cracks often form in such a challenge. Когда кто-то видит фонтан воды из-под канализационного колодца – скорее всего, это прорвало электросварную трубу. However, the low cost is still attractive for construction companies.
Compression. The main advantage of such bounces is seamless. Connected to the main pipe by squeezing the control ring located in the pipe. If we compare more clearly, then compression bounces are mounted according to the principle of a folding cane – inside there is a thread on which the pipe is screwed. Outwardly the connection is not visible and the discharge is completely sealed. Such bounces are widely used in water pipelines, irrigation systems of fields, etc. D. By the way, if you compare the divets of the steeply reduced GOST 17375 2001 with others, then they will be the best precisely due to the lack of external seams.
Welded. Such taps are mounted not with the help of electrodes (as it happens in the case of electric welding), but using arc or induction welding (plasma welding of bends can be used in spacecraft sectors, but this is an extremely rare case). They are used for installation of only two types of pipes: PA100 and PE80 (according to GOST 18599-2001).
Solid. Are also produced steeply bent, as well as compression. Can be made of alloy and carbon steel, which significantly reduces the process of their production. Withstand a fairly wide temperature range from -70C ° to + 450C °.Today their production is growing mainly due to the construction of oil pipelines outside the Far North areas (there is a risk of temperature lowering below -70s °).
Stapmed. Have a radius of 1-1.5 du (this is a bending radius). Withstand pressure inside the pipelines up to 150 atmospheres, and their working pressure ranges from 90-100 atmospheres. Thanks to endurance and wear resistance, they are used in various regions of the country in the construction of gas and oil fields. The most expensive in cost of all.
For civil construction purposes, the best option would be the use of steel compression bends. They are easy to maintain, mounted in a seamless method, cheap in production and have a large margin of strength.
