All the insider knows that steel pipe surface treatment is one of the key factors determine the service life of the pipeline corrosion, it is a precondition for whether the anti-corrosion layer and steel tube can be combined. It is verified by the research institutions that the life of the coating depends on the quality [...]
In the last article, the article talks much on the specific operation methods for the surface treatment of steel pipe, and in this article, which problems should be pay attention on when using spray (cast) shot derusting will be the main topic. Descaling grade The construction process commonly used for anti-corrosive [...]
Spiral steel pipe submerged arc welding process Automatic submerged arc welding was invented in 1940, a new kind of welding method, it adopts slag protection as manual welding, but is not coated electrode, the slag is specially welding flux smelting. This coating system is composed of a funnel with welding flux through a pipeline to [...]
Galvanized pipe coating process A continuous galvanized pipe coating production technology and equipment, and the process includes the following steps: passivation, cleaning; paint; curing, with drying preheating before coating, and the drying preheating temperature is about ±20 ℃ of the curing temperature. The device is based on the known device, before the dip-coating slot with [...]
Thick wall seamless steel tube production process Cutting the circular tube embryo to about 1 meter of billet by cutting machine. The thick wall steel pipe is the pipe that the ratio between outer diameter and thickness is less than 20. Thick wall steel tube is mainly used for petroleum geological drill pipe, oil chemical [...]
1.The folding is easy to happen with inferior steel tube Folding is formed on the surface of the pipe line, this kind of defect often throughout the entire product longitudinal. The reason for causing of fold is due to the pursuit of high efficiency, large reduction of the inferior manufacturer, when go on the next [...]
The application of steel tube in the concrete structure We often see the water-cooled steel structure system. This is by using the specially designed structure to make the water with rust-roof and freeze-proofing material to be a liquid circulation channel, and then by decreasing the temperature to improve the fire resistance characteristics of the steel [...]
Cold rolled seamless steel tube Cold rolled precision seamless steel tube (GB3639-2000) is a kind of seamless steel tube used for precision mechanical structure, hydraulic equipment and the steel sleeve with high precision and good surface. High precision cold drawn precision steel tube is a new type of steel varieties, and its main characteristic is [...]
In this article, I’d like to go on talking about the welded steel tube. 3. The ordinary carbon steel wire casing (GB3640-88) is the steel tube used for protecting the wire in industrial and civil construction and installation of machinery and equipment. 4. The straight seam welded steel pipe (YB242-63) is the steel pipe that [...]
Welded steel pipe is also called welded pipe, and it is made of steel plate or steel strip after crimp molding. Welded steel pipe production technology is simple with high production efficiency, varieties, wide specifications, less equipment investment, but the general strength is lower than the seamless steel tube. Since the 1930s, with the rapid [...]