According to GOST 28548-90 "welded pipe" is a product made of strips or sheet metal by molding and subsequent welding.
Alloy additives in the steel, increase the strength characteristics of pipes.
Longitudinally welded pipes are produced in huge volumes. They are in demand in the commercial and communications industries. They differ from other types of pipe products is that at the final stage, as required by the standards, welded steel pipe (GOST 10705-80) is connected along the seam with an induction or arc welding. There are hot-rolled and cold-rolled varieties, and they differ in size and cross section. This determines the cost of pipes, but not affect the quality and performance properties.
Pipe with seam are manufactured on different technologies, for example:
longitudinally welded hot-rolled steel electric-welded pipes (GOST 107 05-80);
pipes cold-drawn galvanized;
spirally rolled.
Products used in commercial practice and in the form of blanks for other products and ready for stacking at such communications:
household water supply and drainage;
oil pipeline and gas pipeline;
system city-wide and private heating.
Welded steel pipe used in construction as structural element or reinforcement of electrical networks.
Welded steel pipe is also widely used in other domains:
steelwork for the restoration of architectural objects;
manufacture of furniture on a metal frame (sofas, bunk beds, tables and stools with metal legs);
the production of cars;
skeletons of industrial buildings and hangars;
pipelines (pumping gases and liquids), etc.
It's fun! To transport gaseous media under high pressure are used a special heavy-duty pipe doped alloy.
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