Why do we need a large pipe?
Modern industry produces pipesdifferent diameters, which are used in different spheres. Metal rolling of small and medium diameter are used in the houses of most cities. A product of large diameter is most often used in utilities and main oil and gas pipelines. The choice of a pipe of a specific diameter depends both on the objectives of the pipeline, and on its length and operating conditions.
At present, large steel pipesdiameter are divided according to the method of their production. There are single-seam, which are made of steel sheet by means of contact welding. They have a diameter of 114 to 530 mm.
The second type of pipe is called spiral.They are made of metal by means of electric arc welding. The name gives an idea of how the seam is located, thanks to which the final product is obtained. The diameter of such products varies in the range of 159-820 mm.
The third type is the largest - with a diameter of 530 to 1420 mm. They are manufactured by industry with one longitudinal straight seam, which is done by electric arc welding.
Also, in industrial production, edge processing can be performed - trimming and deburring. In this case, pipes can be produced without edge treatment.
The use of these or other materials is laidat the stage of designing various objects. So when building main pipelines for hydrocarbon raw materials, try to use large diameter pipes. A pipe of 1,420 mm makes it possible to create the required cross-country capacity in such a pipeline, and, consequently, the mining organization will not fail its buyer. Similar figures are expected by the designers and from pipes of smaller diameter - 900, 920 or 1020 mm.
In settlements, in the construction of pipelines for the transportation of raw materials, it is better suited
Also in the settlements steel pipe 920x12or 1000 mm can be used in utilities (water supply, sewerage). For example, the replacement for steel pipes 920x12 cast iron pipes is well written here
Plus, even after deducting expenses for digging,zasypke pits, the cost of wages to workers, design work, still more. Their cost is lower than that of cast-iron ones. But the service life of steel pipes is lower than that of cast iron counterparts. But steel is stronger than cast-iron ones - they are not afraid of blows, and consequently, are less damaged during transportation and handling. Another advantage of steel products in front of cast iron in the housing and communal services system is a great resistance to the influence of aggressive environments.