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Comparison of various steel pipes
Seamless steel pipe Wall thickness of seamless steel pipe is relatively thick, relatively small diameter thick. But the diameter is restricted, and its applications are limited, and production costs, especially for large diameter seamless steel pipe production costs are relatively high. High-freq...Read more -
Cold drawn tube fracture
Generation of cold drawn tube fracture When steel tube cold-drawn, due to the hot rolled billets be made after the tank, the presence of defects such as cracks, or high-precision cold drawn tube fracture occurred during use, almost no plastic deformation occurs, generally are brittle fracture. Br...Read more -
Boiler tube
Boiler tube quality problems Boiler tube quality problems mainly in the cracks, shrinkage, peeling, pit, layered, pinhole, slag and so on. Boiler tube defects and injuries that may exist in the same smelting and rolling process. The main defects in the surface of the boiler tube and an outer surf...Read more -
API 5L welded steel pipe
API early in 1926 released by the American Petroleum Institute (API) API-5L standard, initially including three steel grade A25, A, B, and later released several times. Prior to 2000, the worldwide use X70, about 40%, X65, X60 are in the 30%, a considerable number of small-caliber product oil pip...Read more -
Large steel pipe welding
In the large diameter pipe welding process, the workpiece and form a molten solder is melted region, the connection between the material cooled and solidified after the formation of the pool. Large diameter thick-walled tube usually need to apply pressure in welding process. Welding energy source...Read more -
Influencing factors of bright annealing stainless steel pipe
Annealed stainless steel tube brightness determines the quality of the product. Too many factors, listed five important factors for reference. 1, The annealing temperature reaches a predetermined temperature. Stainless steel heat treatment is generally taken to solution heat treatment, that is, p...Read more -
Galvanized steel pipe anti-corrosion requirements
The usage of galvanized steel pipe is getting high, then the requirements of galvanized pipe is more, it was proposed the galvanized pipe completely different resistance to rust (rot) eclipse, which is platedzinc tubes manufacturers challenges, galvanized pipe has what the world demands. Galvaniz...Read more -
ERW pipe weld joint heat treatment process online
The most important feature of erw steel pipe is no foreign filler metal, heating speed, high production efficiency, which is an advantage, but also its shortcomings, which is no filler metal, the filler alloy will not benefit approach to improve the weld properties element; heating temperature is...Read more -
Difference Between ERW, SSAW, LSAW
Seamless steel pipes are mainly used in oil pipeline and gas pipeline, but seldom used in oil pipelines with long-distance. Most long distance pipeline applied ERW pipes, SSAW pipes and LSAW pipes. Here are comparisons of technological features and performance of these pipes. 1. Electric Resistan...Read more -
Introduction to boiler tube
Boiler tubes is a one of seamless pipe. Manufacturing methods is the same as seamless tube, but it has the stringent requirements for manufacture of steel pipes. According to the temperature level,boiler tube is divided into general boiler tubes and high pressure boiler tube. Production methods: ...Read more -
Big Differences between ERW Steel Pipe and Seamless Pipe
Nowadays, with quick construction of society and rapid development of technology, more and more different kinds of steel pipes are created, such as welded steel pipe, seamless steel pipe, ERW steel pipe and so on, and more and more steel pipes are needed. In the competitive market of steel pipe,...Read more -
Difference of ERW and UOE
1： The difference between raw material and production capacity Raw material of ERW steel pipe is hot rolled steel coils, and raw material of UOE pipe is hot rolled steel plate. So the ERW steel tube can realize continuous assembly line work, high production efficiency, production cost is low; A...Read more