Metal pipes used in industry or construction are divided into two large groups — welded and seamless. The technology for the production of seamless pipes determines the complete absence of a seam that fastens the metal sheet. The production of seamless requires large costs of labor, metal and energy resources, so their cost is higher than that of welded. But their production characteristics quite justify such prices.
The weight of a seamless pipe is much smaller than the weight of welded, which means that the structures of such pipes can be used in complex mechanisms, where each extra gram of weight will negatively affect other characteristics of the mechanism of the mechanism. Seamless plastic ones, they can bend in various directions, and not a single bend will create problems with integrity.
Welded pipes as a result of long-term operation begin to flow, so they cannot contain any liquid media under high pressure. That is why only these are used in creating hydraulic systems.
Sequenced by two methods are made — hot deformation and cold deformation. Thin-walled pipes of cold deformation are most often used in the installation of accessories for furniture or household electrical appliances precisely because of their strength to bend.
The material for manufacture is only steel. Low -carbon steel is usually used, but for pipes that requires special strength, steel can be taken alloyed. The use of stainless steel is also possible. If the brand of steel from which pipes are made is subject to corrosion, then the pipe can be covered with an anti -corrosion layer.
The price depends on the thickness of the walls, length, type of steel used. Like any metal distribution, steel pipe prices can be indicated by weight — per ton, and in length — per linear meter. GOST speaks of the following dimensions in length: a non -term length can be made, which varies from 4 to 12, 5 meters, they can be a measured length determined within the same limits. In some cases, pipe lengths of multiple measurement are produced. Their dimensions are provided in the same limits of 4-12, 5 meters, but for each additional incision the allowance of 5 millimeters is required.
Also, the classification of pipes depends on the thickness of the walls. The most thick -walled can be carried out by drilling metal blades.
