Seamless Steel Pipe

    When Great Steel Pipe manufacture pipe bend, there are some factors will influence the quality of pipe bend. How to solve those problems? High-class carbon steel pipe provider - Prime Steel Pipe will share it for all of you.     1, The role of the tube in the external force M under the role of the outer layer of the lateral wall of the tensile stress & 1 role of thinning, the lateral compression stress. The role of thickening, together N1 and N2 to make the pipe cross-section changes. Based on this factor, the main reason for the decline in the quality of the elbow is the main reason for the RX and SX. Therefore, GBJ235-82, the various pressure levels in the case of the RX value and the amount of lateral thinning are made clear, the purpose is to control the RX With the value of SX, thus ensuring quality.     2, The bending accuracy of the pipe bend is also one of the factors affecting the quality. When we manufacture the bending foot, in additi...

    Production technology of galvanized steel pipe     Black inspection → hanging → degreasing → rinse → pickling → cleaning → dipping help plating → hot air drying → hot dip galvanizing → cooling → passivation and rinsing → discharge → inspection and dressing → packaging storage and transport     Technical requirements galvanized pipe should meet     1. Shop sign and chemical composition     The shop sign and chemical composition used by galvanized steel pipe should be consistent with those of black steel pipe stipulated by GB 3092.     2. Manufacturing method     The manufacturing method of the black tube (furnace welding or welding) is selected by the manufacturer. Galvanized steel pipe adopts hot dip galvanizing method.     3. Thread and pipe joint     (1) The galvanized steel pipe with thread to delivery, the thread should be vehicle-made after galvanized. The thread should be...

    Electric Resistance Welded (ERW)     ERW is a specific type of welding process that is used to produce welded steel pipe, such as ERW steel pipe . Seam welding is commonly used during the manufacturing of round, square and rectangular steel tubing. The steel strip is unwound from coils and side-trimmed to control width and condition the edges for welding. The strip then passes through a series of contoured rollers which cold-form the material into a circular (square or rectangular) shape. The edges are forced together under pressure as a butt joint and then welded by heating the material to temperatures above 2000° F. The flash weld that has formed is now removed from the outside diameter of the tube. Once the weld has been tested the tube then passes through a series of sizing rolls to attain its precise finished size, after which the tube is then straightened and cut to length.     Drawn Over Mandrel (DOM)     Technically, DOM is not a...

    The advantage of high-frequency Longitudinal Welded Pipe ( commonly abbreviated as HFW steel pipe), some people also all it as ERW steel pipe is that it has heat treatment after welding, can eliminate the welding line and the residual stress in the heat affected zone, refine the grain and strengthen the mechanical properties. Making full use of and expanding this advantage, pipe manufacturer (such as Prime Steel Pipe) can improve product quality and develop new products. Such as Baosteel HFW610 unit, Zhejiang CNOOC Jinzhou oil steel pipe HFW630 unit, Wuhan Iron and Steel Wuhan Jiangbei HFW660 unit, Bohai equipment Dagang oilfield new century HFW245 unit and PetroChina Baoji oil steel pipe SEW unit develops high quality oil special tube, marine pipeline, oil casing and slurry Pipeline and so on all illustrate the trend.     For the HFW unit, the larger diameter will even more be limited by the weight of the strip material and the wall thickness. The storage equ...

    Steel pipe, no matter which kind of category, from seamless to welded, is essential for human’s life. With each steel pipe’s process character, they can have different function for various engineering project. Today, we would like to have an introduction of optimization of sulfate zinc plating in hot galvanized steel pipe.     Optimization of sulfate zinc plating:     Sulfate zinc plating has the advantage of 100% current efficiency if necessary. Of course, the deposition rate is faster than other elements with retaining the main salt of zinc sulfate, and the remaining components are discarded. Production practice has proved that the thickness of the coating can meet the requirements in 2 ~ 3 minutes for continuous plating of wire and pipe.     http://www.xysteelpipe.com/info/Optimization-of-sulfate-galvanizing-process-in-hot-dip-galvanized-steel-pipe-901-1.htm

    Actually, steel pipe would have their life time so that we cannot hope that they can work for us all the time. They may die whether seamless steel pipe or ERW steel pipe, SSAW steel pipe if we don’t repair them or cure them when we figure out that they are ill.     Rust would be one of the common ill for steel pipe. First of all, we should figure out the etiological diagnosis for this ill. We know that steel would rust when they exposure to water, air. Of course, the more complex, the bad the ill. Under this situation, we should take different measures for different steel pipes when they transported to different environment. Then we should find the method for them.     The main use of wire brush and other tools on the polished steel surface, you can remove the loose or tilt the oxide skin, rust, welding slag and so on. For example, galvanized steel pipe would be one of the way to solve the problem of rust under exposure. In addition to. Spraying sho...

    Clients would think about the quality guarantee period for steel pipe if they’ve made by similar material and process. What would you choose from seamless steel pipe, ERW steel pipe and galvanized steel pipe for the engineering project.     Generally speaking, we should account the different situation for different choice. High pressure work environment would choose seamless steel pipe due to its special production process. Of course, for general residential water pipes, editor thinks that galvanized steel pipe is also nice. And here is the trouble: the protective zinc layer will erode due to constant exposure to moisture.     How do you think about this question? Generally speaking, all kinds of pipelines such as wood, lead, copper, paper fiber, concrete and plastics can be used to transport water for residential customers. And all of them need to be exposure into the air, moisture. So this problem is not just for steel pipe. Under this situation, ...