Almost all people know what ordinary metal pipes look like. Most often they have a round section of various diameters. Profiled pipes are produced with a section in the form of an oval, rectangle, square, polygon.
General information
The mechanical characteristics of this rolled metal must fully comply with GOST 13663-86. At the moment, profiled pipes of 120 standard sizes can be found on sale. The assortment of electric welded products corresponds to the following state standards: oval - 8642-68; square - 8639-82; rectangular - 8645-68. For the manufacture of these pipes, steel of the following grades is most often used: St2ps, St2sp, St2kp, St4ps, St4sp, St4kp (GOST380-94); 10, 20, 35, 45, 10PS, 08 KP (GOST 1050-88). Profiled pipes can also be made from low-alloy steel grade 09G2S. Stainless steel products differ from ordinary ones not only in cross section, but also in wall thickness.
Classification of profiled pipes
Based on the purpose of this metal product, the following groups of pipes are divided:
- A - for it are normalizedmechanical properties.
- B - mechanical and chemical properties are normalized for it.
Profiled pipes can be produced in two ways: with and without heat treatment. According to the manufacturing method, they are divided into several categories: cold-formed (have high structural performance), hot-formed, electric-welded, cold-formed electric-welded pipes made of carbon steel (durable, but more expensive).
Profiled pipes have a much greater mechanical strength than conventional round pipes. At the same time, the weight of such a product with comparable strength characteristics will be approximately 20% less. Such pipes are welded and seamless. The former are made from strip or sheet steel, while the latter are made from tubular blanks and solid metal ingots.
Profiled pipes are much easier to install, which allows them to be used in different areas of the economy. They are universal rolled steel, since they have the following properties: high manufacturability, reliability and simplicity of nodal connections, a minimum number of welds, low aerodynamic resistance. Structures made of such metal-roll reduce the capacity of the foundation, the cost of its installation and make it possible to build very durable metal-concrete structures. Thanks to the use of profiled pipes, the speed of installation of structures and buildings increases.
Scope of profiled pipes
This type of rolled metal is used in construction, mechanical engineering, construction of various frame structures (for supports, spans and ceilings). Most often, oval rolled products are used for decorative elements and in the manufacture of furniture. Rectangular and square pipes are more suitable for structures placed on flat surfaces. Now it has become fashionable to use profiled pipes for the fence. For its manufacture, poles of 60x60 mm are suitable. The interval between them is 3 m. The depth is 1.2 m. When constructing the fence, a profiled pipe 20, 40x25 mm is used. Entire sections are made from it, welded onto poles.
