Seamless pipe is a kind of steels having hollow section and shaping in roundness, square or rectangle with especially no seam being around, which is quite different from welded steel pipe which has seam on the surface thanks to its different technological process that welded steel pipe is made by bending steels into roundness, square and then welding. What's more, due to the hollow section, seamless pipe is widely taken advantage to transport liquid as pipeline and on account that seamless pipe is lighter on the same bending and twisting resistance, compared with welded steel pipe, seamless pipe is economical section material, used in making structural member and machine parts. Because of excellence of seamless pipe, seamless pipe is largely imported from countries which have super technique of production while many national factories are fast growing in the industrial of seamless pipe. The tips for seamless pipe importers are as follows.
Mechanical property of steel is an important index promising the final usability, which decided by the chemical composition of steel and the heat treating regime. According to the various requirement of use, tensile property and the index of hardness and toughness are regulated in the standard of steels while high-and-low temperature performance is required by users. Note that the standard of seamless black steel pipe is quite different from national one so that importers should carefully pay attention on the standard of seamless welded steel pipe and widely choose the right one.
The final state of plastic deformation or heat treatment is called delivery state, which must be given clear indication of in the contract when importers order goods. There are two types of delivery state, manufacture state which describes seamless pipe without heat treatment and heat treatment condition which indicates seamless pipe with heat treatment. Furthermore, importers should carefully distinguish practical weight that the weight of products is weighed on the scales in the process of delivery, and theoretical weight, that the weight of products is gained by calculating through the size of seamless welded steel pipe. The most important is that importers should have a clear picture of international seamless welded steel pipe companies, which are TENARIS, Watt's Lake, Sumitomo, JFE and TMK.
XINLIN Company is a transnational company which is especially famous for seamless pipe production, which can produce 33 million tons seamless pipe and 9.3 million tons welded pipe while only 32 percent of its products are used in its own country and 68 percentages is sold to the foreign countries. V&M Tubes which takes the lead in producing hot rolling seamless welded steel pipe and steel pipe dedicated in the oil industrial is one of subsidiaries of Watt's Lake while ValTubes is keen on the production of high-added steels and stainless steels utilized in car industrial and factories. What's more, Sumitomo is the well-known integrated iron and steel complex, which produces 30 million tons steel pipe, including seamless pipe and welded pipe. Amazingly, JFE, a Japanese company, is a all-around steel production company, the 80 percent of which is plats but 7% of which is pipes. As the biggest steel company in Russia, the total producing ability of TMK is up to 50 million tons, which occupies 45 percent of producing ability of whole Russian Pipe Company.
In general, the knowledge of mechanical property, the final state and a clear picture of international seamless pipe companies are really necessary when importers decide to purchase seamless API steel pipe. The tips for importer are helpful. As the old saying goes, ‘opportunity is to those who are prepared', every big profit made by importers is based on the enough preparation, the knowledge of mechanical property, the final state and a clear picture of international seamless pipe companies.
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