Modern industry produces pipes of different diameters, which are used in various fields.Metal small and medium diameter are used in the homes of most cities.A large-diameter products are most often used in utility communications and oil and gas pipelines.Selection of a particular diameter pipe depends on the purpose of the pipeline, and on its length and the operating conditions.
Types
Currently, steel pipes of large diameter divided by the method of their production.There are single-seam, which are made of steel sheet by means of resistance welding.They have a diameter of from 114 to 530 mm.
second type of pipe called a spiral.They are made from rolled metal using electric arc welding.Title gives an idea of how the seam is located, whereby the final product obtained.The diameter of such products is in the range 159-820 mm.
The third type are the largest - with diameters ranging from 530 to 1420 mm.They are commercially available with a single longitudinal straight seam, which is arc welding.
also in industrial production can be made Matting - trimming and deburring.This may be issued and the tube without edging.
Application
The choice of the material is laid at the stage of designing of various objects.So during the construction of pipelines for hydrocarbon raw materials, trying to use large-diameter pipes.Pipe 1,420 mm allows you to create in a cross-country pipeline necessary raw materials and, consequently, the mining organization will not let the buyer.Similar rates are expected by the designers and the smaller diameter pipes - 900, 920 or 1,020 mm.
In settlements, the construction of pipelines that transport raw materials better suited pipe 920 or 1200 mm.This is due to the fact that these pipes are more compact and not much stand out against the urban landscape (with external piping), and in the process of laying the underground - you need a pit at depth (and therefore need less labor costs for snatching and backfilling of trenches).
also in settlements steel pipe 920h12 or 1000 mm can be used in facilities of public utilities (water, sewerage).For example about the replacement of steel pipes 920h12 cast-iron pipes are well written http://steel-snab.ru.
Plus, even deducting the cost of digging, backfilling of trenches, the cost of workers' wages, project work, it is still more.Their cost is lower than that of iron.But the life of the steel tube is lower than that of cast iron counterparts.But stronger than cast iron, steel - they are not afraid to shock and therefore less damaged during transportation and handling operations.Another advantage of steel products to iron in the system of housing and communal services - high resistance to corrosion.
