steel tube

    As long as it is for seamless steel pipe has a certain understanding of friends, you know that it has a lot of hollow section, to a large number of into the fluid in the pipeline, such as oil and gas pipelines, etc. Solid material such as steel pipe, if the bending strength is equal, its quality is small, easy to transport and install, is a kind of economic cross section steel, at the same time can also be widely into the mechanical parts, such as oil drill pipe and bike rack, etc., its effective to improve the material utilization, but also can simplify the manufacturing process.     And now the domestic market of seamless steel pipe manufacturing technology good and bad are intermingled, want to buy high quality seamless steel tubes for amateurs also exists a certain difficulty, so how to buy seamless steel tube?     Seamless steel tube standard now has a total of 47 items, the GB/T17395 seamless steel tube, regardless of size or has a certain dev...

    Casing in the production prone to outer folding defects, affect product quality improvement, it needs to be controlled.     There are several outer folding edge oxide particles cause segregation of elements, with a folding, an oxide middle folding, the presence of an excess of Al, Mg, Ca, S, P, Mn, Si outer folding element, particularly at the grain boundaries have 20μm so brittle inclusions SiO2 and silicates, intergranular fracture occurs, and said brittle inclusions is the main reason for the formation of the outer fold.     Smelting process:     1) To ensure that a pull carbon hit, after avoiding blowing carbon control endpoint> 0.10%;     2) Increase the effect of converter slag, slag under strict control, the departure process using slag, a steel ladle slag after thickness <50mm;< span="">     3) Double slag operation, control phosphorus content of the molten steel.     Refining proce...

    First,after hot rolling, steel internal non-metallic inclusions (mainly sulfides and oxides, and silicate) is pressed into thin slices, delamination (interlayer) phenomenon. Layering the steel in the thickness direction of the tensile performance deteriorated significantly, and there may be an interlayer tears during weld shrinkage. Weld shrinkage induced local strain reaches the yield point strain often several times larger than the load caused by the strain.     Second, the residual stress caused by uneven cooling. The residual stress in the absence of external force internal self-equilibrium stress, hot-rolled steel sections have such a variety of residual stress, the greater the general steel-sectional dimension, the greater the residual stress. Although the residual stress from equilibrium, but still has some influence on the properties of steel members under loads. Aspects such as deformation, stability, fatigue, etc. are likely to have an adverse effect....

    Resistance welding is to press the workpiece to be clamped between two electrodes and apply an electric current, which is heated to a molten or plastic state by the resistance heating effect caused by the current flowing through the contact surface of the workpiece and the adjacent region, so as to form a metal. A combination of methods. Welded pipes made with resistance welding are called electric resistance welded pipes(erw pipe).     ERW pipe machine     ERW pipe machine, its efficiency is 3 to 5 times higher than the traditional TIG welding. Due to frequent occurrence of defects such as incomplete penetration of the root and sagging of arc pits, the TIG welding MIG welding filler and capping process was used. Although the improved welding process basically solved the problem of incomplete penetration of the root, the welding efficiency was reduced. Increased investment in equipment, but also complicated operating procedures.     The ...

    Shell fabric’s feeling would be an important reference factor for buyers who need clothes. So does for steel pipe, not matter you are seamless steel pipe, ERW steel pipe, or SSAW steel pipe.     Affected by following factors of the pipe surface roughness:     1: Wear resistance of pipe surface roughness. Generally speaking, the rougher the steel pipe's surface, with the smaller effective contact area among the mating surfaces, there is more pressure, there is more wear here!     2: Roughness stability would be affected by complex nature. For the steel pipe's surface, the rougher, the easier it is to wear. Under this situation, we should make sure the high quality of the steel pipe's roughness.     3: Pipe surface roughness would have impact for gas or liquid erosion. Rough surface is easy to make corrosive gas or liquid penetrate the inner surface of the microscopic metal, causing surface erosion.     http://www.x...

    There is the coming of rainy season in Hunan province with the coming of spring. That means the rain maybe fall in torrents in most of time. Under this situation, as manufacturer of seamless steel pipe, Tianjin Xinyue Steel Group know we should keep the better work of each kind of steel pipe.     For welded steel pipe like SSAW steel pipe used for sewage dealing: we should make sure the smooth all the time as the rain would come more than usual time. There are various impurities in it so that we should clear it.     For welded steel pipe or seamless steel pipe used in home for transmission of tap water. We should take an eye on the moist environment. We all know it would be damage because of the moist under the rainy day. So it is necessary to keep it dry if we could.     Of course, the elements would be vary when we really want to expand the life of steel pipes.     http://www.xysteelpipe.com/info/Rainy-season-with-steel-pip...

    Usage of spiral steel pipe is relatively high, the application is very wide, it should be how to choose before in the selection to pay attention to quality.     The first method is a more professional detection method, that is, by the strength of the pressure vessel to be detected. Commonly, we use atmospheric pressure and water pressure to detect, in this way can detect the working conditions of the spiral steel pipe in the pressure working environment, but also to detect the tightness of the spiral steel pipe, generally take the atmospheric pressure detection, because such security Relatively high, and if the water vapor pressure through the test, then the need to remove the spiral pipe after the water, too much trouble.     The second method is also relatively simple, that is, through the surface of observation. With the naked eye found in the spiral steel pipe in the welding and size of the problem, if necessary, you can also use the standard s...