Seamless Steel Pipe

　　Introduction of stainless steel pipe engineering accessories 　　Stainless steel pipe fittings are a type of stainless steel pipe engineering accessories. It is made of stainless steel. It contains: stainless steel elbow, stainless steel tee, stainless steel tee, stainless steel reducer, stainless steel pipe cap, etc. 　　Classification and function of stainless steel pipe engineering accessories 　　According to the connection method, it can be divided into socket stainless steel pipe fittings, threaded stainless steel pipe fittings, flange stainless steel pipe fittings and welded stainless steel pipe fittings. The stainless steel elbow is used for the place where the pipe turns; the flange is used for the parts that connect the pipe and the pipe to each other and connected to the pipe end; the stainless steel tee is used for the place where the three pipes are collected; Place; stainless steel reducer is used where two pipes with different pipe diameters are connected. 　　Stainle...

　　Casing drilling and conventional drill pipe drilling have obvious advantages. It is a technical feature of drilling engineering and it can bring huge economic benefits to casting operators. 　　Casing drilling has the following characteristics: 　　1. Casing drilling uses standard oil well casing, and drilling and casing operations are performed simultaneously; 　　2. The downhole drilling tool assembly is installed at the lower end of the casing string, and can be quickly taken out through the inside of the casing with a wire rope. During the removal process, the mud can be continuously circulated; 　　3. Throughout the drilling process, keep the casing straight to the bottom of the well to improve the well control situation; 　　4. The casing is only drilled into the formation in one direction and no longer rises out. Unless it is confirmed that the well is dry after drilling, the last casing string may be taken out; 　　5. Casing drilling can continue to use many existing drilling...

　　 Steel pipe fittings play an important role in the connection, control, change of direction, streaming components collectively sealed and supporting. Carbon steel pipe fittings are main auxiliary products for the steel pipe. The key products contain carbon steel elbow, flanges, steel cap, steel tee, carbon steel pipe reducer. The standards include national standard, American standard and DIN. 　　Carbon steel pipe fittings are also called pressure pipe fittings. It is usually divided into three types: butt class pipe fittings, socket welded pipe fittings and threaded pipe fittings. In pipe joints system, you need various sizes of steel pipe fittings due to the different pipe sizes. For instance, you have to connect to a straight tube or tube section, the threaded pipe fitting is necessary. After the deep process of finished steel pipe, any pipe should belong to the scope of the steel pipe fittings, because it has double characteristics of the tubes and mechanical elements. 　　The s...

　　 Classified by Production Methods 　　1.Seamless Steel Pipe- hot rolled seamless steel pipe , cold rolled seamless steel pipe, cold drawn seamless steel pipe 　　2. Welded Steel Pipe - longitudinal welded pipe, spiral welded pipe, electric resistance welded pipe 　　 Classified by Cross-sectional Shape 　　1. Simple section steel pipe - round carbon steel pipe, square carbon steel pipe, rectangular carbon steel pipe, oval carbon steel pipe ect. 　　2. Complex section steel pipe - hexagonal carbon steel pipe with unequal edge, five plum shaped carbon steel pipe, double convex carbon stee pipe, double concave carbon steel pipe ect. 　 　Classified by Wall Thickness 　　1. Thin walled carbon steel pipe 　　2. Thick walled carbon steel pipe 　　Classified by the Application 　　Carbon steel pipe can be used for thermal equipment, machinery industrial pipe, oil line pipe, geological drilling steel pipe, container steel pipe, chemical industry steel pipe, and other special purpose steel pi...

　　 ERW Steel Pipe Preheat Deformation Technology 　　Below is the method of ERW steel pipe preheat deformation: 　　First, the rational selection. On the mold should be selected for precision messy material deformation of a good micro-deformation of steel, carbide segregation serious die steel should be a reasonable casting and quenching and tempering treatment, the larger and can not be casting mold steel can be solid solution double fine heat treatment. Reasonable choice of heating temperature, control the heating rate, the mold can be used for precision messy slow heating, preheating and other methods of equilibrium heating to reduce the mold heat treatment deformation. 　　Second, the correct operation of the heat treatment process and a reasonable tempering heat treatment process is to reduce the deformation of a useful tool for precision messy method. Precise messy mold deformation reasons are often messy, but we only need to master the deformation rules, analysis of the causes ...

　　 ERW steel pipe manufacturers, in the production of high-frequency welded pipe process, will face the tube surface was scratched the situation, the main reason for this is due to the guide roller and squeeze roller caused. The following specific analysis. 　　1. Scraping caused by the guide roll generally occurs on both sides of the high-frequency welded pipe, the characteristics of the wound is relatively large, continuous strong. Reasons include: 　　(1) The height of the guide sleeve position is not correct, such as the guide roller bearing damage, the guide roller can not be a good control of high-frequency welded pipe, so that friction with the guide sleeve caused by scratches. 　　(2) When the guide roll deviation from the high-frequency welded pipe production line rolling center line is too large, the guide sleeve and guide roller relative difference is too large, resulting in both sides of high-frequency welded pipe scratches. 　　2. Scratches caused by high-frequency weldin...

　　The main way of transportation of crude oil are: land transport and sea transport two categories, in general, the cost of water transport is less than land transport, which in the case of conditions may give priority to water transport. Including pipelines, railways, highways and other modes of transport by land, due to on road transport the tank car used by small-scale, comprehensive high costs, usually not as a means of transportation of bulk oil. Therefore, the main mode of transport for the pipeline transportation is crude oil and rail transport. 　　Since the pipeline has little outside influence climate and low transport costs, less transportation loss, high security and other advantages, especially for long-distance transport of flammable and explosive oil and gas, therefore, it has become widely used in oil and gas transportation by transport the way. As a result of pipeline custody transfer, greatly reducing the evaporation loss, under normal circumstances pipeline loss is ...

　　What are the measures to prevent hot corrosion of seamless steel tubes? 　　Under high temperature and molten deposits, oxygen and other corrosive gases act simultaneously. The corrosion produced is called thermal corrosion. For example, the corrosion of high temperature alloys in high temperature sulfur and salt containing gas. 　　In this case, the sulfide film formed by corrosion is loose and porous or cracked, and the concentration of crystal defects of the sulfide is large, which is conducive to the diffusion of metal, oxygen and sulfur through the film, and the melting point of the metal sulfide is low, which is easy to generate a melting point. For lower metal-metal sulfide eutectics (for example, the melting point of Ni3S2 is 787 ° C, while the melting point of Ni-Ni3S2 eutectic is only 645 ° C), for the above reasons, thermal corrosion is often more severe than simple high temperature oxidation. If the atmosphere contains elements such as vanadium and molybdenum, since the m...

　　In the field of construction, in general, it is very common to use structural pipes . Whether in blacksmithing, in structure assembly, column assembly, etc. That is why it is important to know what the characteristics are and what are the advantages of using structural pipes in construction. 　　What are the advantages of using structural tubes? 　　Welded structural tubes offer great advantage over the classic structural profiles: 　　* Due to its closed shape and low weight, they offer better torsional stress behavior and provide better buckling resistance. 　　* They also have ease of assembly, which allows to perform better simple joints by welding. 　　* Reduced exterior surfaces, without sharp angles, allowing easy maintenance and corrosion protection. 　　In Prime Steel Pipe we offer the ASTM A-500 quality in black or galvanized finishes, the standard length of our product is 6 meters, but we can offer other lengths under special order. The dimensions range from 10 mm up to 50...

　　 Welded steel pipe , also called welded pipe, is a steel pipe made by welding steel plates or strips after rolling. Welded steel pipe production process is applied to seamless steel pipes. Since the 1930s, with the rapid development of high-quality strip continuous rolling production and the improvement of welding and inspection technology, more and more fields have replaced seamless steel tubes. Welded steel pipe is divided into straight seam welded pipe and spiral welded pipe according to the form of weld. 　　The blanks used for welding steel pipes are steel plates or strip steels, which are divided into furnace-welded pipes and electric-welded (resistance-welded) pipes due to their different welding processes. Because of its end shape, it is divided into round welded pipes and special-shaped (square, flat, etc.) welded pipes. Welded pipes are classified according to their materials and uses. 　　GB / T3091-2001 (galvanized welded steel pipe for low-pressure fluid transportation)....