You've probably seen the designation of steel pipes which she described the figures obscure title, Guest. Let's try forever to understand this question. Types of pipes vary in the way of their manufacturing on: 1 cast – made in a special pipe-casting machine. 2 Weld – made from special blanks that are formed and welded at the junction. 3 pipes, the method of construction, which differs from the weld by that different methods of drawing, rolling or extrusion billet steel pipe is not having a seam – Seamless.
In turn, welded classified according to the method of manufacture, the electric and cold. Seamless classified into hot and cold. Further distinguish what type of steel pipes is the nomenclature. The following are steel pipes which are often made in the workplace. Tubes for general and special purpose: Tubes for general and special purpose are divided into hot-rolled, hot-rolled and welded Tubes Profiles: Profile pipes distinguish rectangular, square, oval, flat, and others. Pipes for drilling, fastening and operating wells: Pipes for drilling, fastening and operating wells is divided into pump and compression, casing, drilling and exploration.
Pipes and cast iron or steel: pipes and cast iron are classified on the steel and cast iron. There are still other types of steel pipes is: bearing, non-ferrous and rare metals, boilers, from different alloys. Assortment of pipes shall be appointed by the State Standards (GOST), as determined by the rectangular steel pipes gost 8645-68. That is the state standard provides the size, steel and other normative value in the production of steel pipe. Now let's analyze all of the above is an example: pipe 21h1 Art. 24G2 steel rectangular gost 8645-68 is 21 mm in outer diameter, 1 is the wall thickness in mm, art. 24G2 is a brand of steel used in the manufacture of pipes. At the end of the State Standard gost 8645-68, which sets the technical requirements and product mix for production of the pipe. Now you know how different pipes, what all the names in names and you should not show difficulty in reading the technical notation.