Seamless Steel Pipe

　　Galvanized square tube in two ways: hot-dipped galvanized square pipe and galvanized square tube into two categories. Galvanized square pipe with wet, dry, lead, zinc, oxidation reduction method. Different methods of hot dip galvanized steel pipe main difference in the acid leaching after cleaning, the method used to improve the surface activation of galvanized pipe quality. Are mainly the production of dry and oxidation-reduction method, which is characterized in Table. Electro-galvanized zinc layer of the surface is very smooth and dense, homogeneous; has good mechanical properties and corrosion resistance; hot dip galvanized zinc consumption lower than 60% to 75%. Galvanized of the technical complexity, but the single-sided coating, inside and outside surface of the coating thickness of the different double-sided coating, and thin-walled tube galvanized h ave to be using this method. 　　Stronger protective effect of galvanizing the anti-corrosion ability. The entire structure fr...

　　The derusting methods for high pressure boiler tube: 　　Cleaning: In order to achieve the removal of oil, grease, dirt, organic lubricant and similar organic matter, we can use the solvent, emulsion to clean the surface of high pressure boiler tube. But it can not remove the surface rust in high-pressure boiler tube, oxide, welding etc, so it only in anti-corrosion production only as an auxiliary means. 　　Removed rust by tools: Mainly use the wire brush and other tools for surface grinding of high pressure boiler tube, it can remove loose or tilt of the oxide, rust, welding slag and so on. Manual tool derusting can reach Sa2 level, power tools derusting can reach Sa3 level, and if the surface of the high pressure boiler tube attached to a solid iron oxide, tool rust effect is not so good, it will not achieve the requirements of anti-corrosion construction of the anchor depth. 　　Pickling: General use of chemical and electrolysis two methods to do pickling treatment, pipeline corr...

　　In general, structural pipe is a type of steel construction pipe that meets certain standards of chemical composition and mechanical properties. This pipe can be used for a wide variety of structural applications and there are variety of types of structural pipe available. Common types of structural pipe include: 　　 Seamless Steel Pipe : Seamless steel structural pipe is a durable pipe product that is commonly used for dock piling, pipe piling, caissons, and bollards. 　　ERW Steel Pipe: This structural pipe is typically known to the construction industry as high quality line pipe and it is commonly used by the oil and utility companies. This steel pipe can be used for sign pole, column, dock, and tunnel construction. 　　Spiral Steel Pipe: This is an economical and durable type of structural pipe that offers long lasting durability for things like road casing, piling and trenches. 　　DSAW Carbon Steel Pipe: This structural pipe is welded on both the OD and the ID. It is available...

　　Steel pipe making process is consistent with emerging regulatory requirements concerning API steel pipe since we have improved operating practices with the help of control devices. Second, almost all of the potential emissions in steel pipe making process can be captured or controlled very well. Also, if the cement is wet the black steel pipe surfaces beneath them will still be soft as a result. And these softened surfaces in the tight part of the joint will tend to fuse together in steel pipe making process. Over the last century, the iron stock in use has greatly increased, which is in the same order of magnitude as the remaining black steel pipe stocks. On a global scale, steel pipe making process might be less significant when it is compared with natural ores, but their relative importance is increasing without any doubt. 　　With a perfect recycling system, we could substitute black steel pipe utilization for domestic usages and the per-capita in-use black steel pipe may reach ...

　　The seamless steel tube is a long strip of steel with a hollow section and no seams around it. Its characteristics are as follows: 　　First, the thicker the wall thickness of the product, the more economical and practical it is, the thinner the wall thickness, the greater the processing cost of the seamless pipe factory; secondly, the process of the product determines its limitations. Performance, general seamless steel pipe with low precision: uneven wall thickness, low brightness inside and outside the tube, high fixed-length cost, and pitting and black spots on the inside and outside of the table are not easy to remove; third, its detection and shaping must be processed offline. Therefore, it embodies its superiority in high-pressure, high-strength, mechanical structural materials. 　　Seamless pipe process: tube blank - inspection - stripping - inspection - heating - perforation - pickling - grinding - lubrication and air drying - welding head - cold drawing - solution treatment...

　　OCTG casing and tubing is a kind of popular steel pipe in the steel industry, but there occurs decarburization phenomenon for the OCTG tubing and casing. Then what do we take the measures to avoid decarburization for them? 　　Generally, there are two ways to avoid decarburization for OCTG casing and tubing. One is the common and simple way: make full use of nitrogen protective to sustain the pressure inside the furnace. According to proportion, workers can join or inject into the neutral nitrogen to the furnace, which will not only prevent the outside air decomposing into oxygen and water vapor into the debris but also disperse the gas existing oxidation in furnace effectively. Without reaction medium with the surface of carbon, decarburization would not happen and the area of the decarburization also can be reduced generally. 　　Another way is to make the balance to control furnace carbon dioxide levels according to the OCTG tubing and casing workpiece. Expert research if the bal...

　　Long distance oil pipeline consists of two main parts: the oil transportation station and the pipeline. 　 　Oil transportation station 　　The starting point of the pipeline is an oil transportation station, known as "the first station", after the crude oil is collected and calculated, the first station provides power to transport to the downstream pipeline. The first station is generally arranged with oil storage tanks, oil pump and oil metering device. Oil pumps provide power to make the oil moved along the pipeline to the terminal or the next level of oil transportation station. Under normal circumstances, due to the long distance, the energy loss of transporting process is obvious, it’s need multilevel oil stations to provide power until crude oil sent to terminal. The end of the oil station known as "terminal station", mainly responsible for collecting material transported from the upstream pipeline, therefore equipped with many tanks and metering system. ...

　　The internal and external area of the pipe can both be corrosive because of different factors. The external pipeline corrosion can mainly due to the surroundings, such as acid soil, wet conditions and so on. Factors that lead to internal corrosion are the oxygen content, temperature, pressure and flow rate of the liquid carried in the pipelines. Due to the above reasons, the anti-corrosive pipeline coating can be put into two corresponding categories, the internal and external corrosion-resistant coating. 　　 Internal anti-corrosion coating 　　Oil and gas liquid carried by the pipelines contains various chemical solid particles, some of which dissolve in the fluid while some remain. Those chemical particles remaining in the fluid travel in the pipe at a high speed, therefore, the internal coating is supposed to withstand friction caused by the fast moving particles. Besides, the internal coating material is expected to have a low surface roughness, thus, increasing the flow efficie...

　　 Shape 　　Pipes are always round in shape. Tubes can be square, rectangular or round. 　　 Strength 　　Tube is stronger than pipe. 　　 Metal Types 　　Tube is available in hot rolled steel and cold rolled steel. Pipe is typically black steel (hot rolled). Both items can be galvanized. 　　Rigidity 　　Although copper and brass tubes can be shaped relatively easily, tubes are are typically rigid. Pipes, on the other hand, are invariably rigid and cannot be shaped without special equipment. 　 　Size 　　Pipe is typically available in larger sizes than tube. 　　 Applications 　　Only pipes are pressure rated and intended to be used for the transference of fluids or gas. Tubes, on the other hand, are used in structural applications. 　 　Telescoping abilities 　　Tube can be telescoped. Remember to account for the flash weld inside the tube. Pipe, on the other hand, does not have a flash weld. DOM (Drawn over Mandrel) Tube is the best material for telescoping because the inside flas...

　　Beveling ends can be made into various angles, achieving the better welding seam. Common beveled ends for butt joints are I—Type butt joint, single—V beveled end, double—V beveled end and single U—beveled end. 　　Beveled angle refers to the angle between the two beveled surfaces. Beveled face angle, normally used for single-U type, refers to the angle between the beveled surface and the vertical line to the pipe itself. The root opening refers to the gap between the roots of both pieces before welding, to ensure the roots get complete welding. The root radius for single-U beveled end is to increase the transverse space between the roots, making the welding reach the bottom of the root. 　　I—type butt joint, also called square butt joint, is a relatively simple joint method for pipes of 1 to 6 mm in thickness. Strictly speaking, it is not a beveled end joint, for it only requires parallel matching the edges of two pieces together without certain angles. It is easy and economic to pr...

　　Large diameter LSAW steel pipe is made of steel plate or steel strip after bending (electric model 0317 and check 6012755 standard) and then is made of by high-frequency welding and submerged arc welding. According to the form of seam welded steel pipe is divided into LSAW steel pipe and spiral welded pipe. According to the use it is divided into general welded pipe, galvanized steel pipe, blowing oxygen pipe, wire casing, metric pipe, roller tube, deep well pump, automotive tube, transformer tube, welded thin-walled tube, welded pipe and spiral welded pipe. 　　Large diameter LSAW steel pipe is used to transport low pressure fluid. Implementation of the standard is GB/T0317 No. 6012889. It is manufactured with Q195A, Q215A, Q235A steel. It can also be made of other mild steel that is easy to weld. Steel pipe must be tested by water pressure, bending, flattening and other experiments, the surface quality has certain requirements, the delivery length usually is 4-10m, and it often re...

　　Deformation heat treatment 　　High temperature deformation heat treatment can increase the yield ratio and elastic limit of spiral steel tubes. Improve the comprehensive mechanical properties, fatigue properties and stress relaxation properties of spiral steel tubes. It reduces the ductile-brittle transition temperature of steel, reduces the temper brittleness of steel, and has the advantages of simple process and energy saving. 　　The spiral steel pipe is highly effective when it is subjected to high temperature deformation heat treatment. The specific process is as follows: heating temperature is 920-950 °C, shape variable is 10%-30% during hot rolling, air cooling time is 10-30s, oil quenching; then ordinary tempering or high temperature rapid tempering above 400 °C. 　　Ferrite state chemical heat treatment 　　The ferritic chemical treatment such as nitriding and nitrocarburizing can significantly improve the surface hardness, wear resistance, corrosion resistance, residual co...

　　Today, Great Steel Pipe will tell you how to distinguish the ERW steel pipe and seamless steel pipe. 　　 ERW Steel Pipe 　　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. 　 　Seamless Ste...

　　Defects on the seamless steel pipe internal and external surface have a great influence on the performance of high-pressure boiler tubes using. As a leading seamless steel pipe manufacturer, Prime Steel Pipe will adopt some measures to control quality in the production process of seamless steel pipe. 　　1, Add hot ingot, billet surface and perforation of the capillary inner and outer surfaces are determined by the shortage tube outer diameter surface, remove oxide skin, eliminating the resulting scarring and other defects. 　　2, Use high-quality work, excellent mold and process for lubrication to prevent sticking during rolling of steel, defects, excessive wear and other phenomena, to eliminate the resulting straight, scratching, rolling off, cracks and other defects. 　　3, Use protective gas heat pipe. No shielding gas should be heat-treated steel shot blasting, sanding, etc. Overall, the surface of iron oxide to eliminate defects and improve surface quality and ease of surface ...

　　Large diameter LSAW steel pipe is made of steel plate or steel strip after bending (electric model 0317 and check 6012755 standard) and then is made of by high-frequency welding and submerged arc welding. According to the form of seam welded steel pipe is divided into LSAW steel pipe and spiral welded pipe. According to the use it is divided into general welded pipe, galvanized steel pipe, blowing oxygen pipe, wire casing, metric pipe, roller tube, deep well pump, automotive tube, transformer tube, welded thin-walled tube, welded pipe and spiral welded pipe. 　　Large diameter LSAW steel pipe is used to transport low pressure fluid. Implementation of the standard is GB/T0317 No. 6012889. It is manufactured with Q195A, Q215A, Q235A steel. It can also be made of other mild steel that is easy to weld. Steel pipe must be tested by water pressure, bending, flattening and other experiments, the surface quality has certain requirements, the delivery length usually is 4-10m, and it often re...

　　Straight seam ERW steel pipe is made with hot-rolled coil, straight seam welded steel pipe can be divided into high-frequency electrical resistance welding and submerged arc welding by different welding type. Compared the welding process of submerged arc welding steel pipe, high-frequency ERW steel pipe does not add any welding materials in welding process, weld forming has not through hot-melting state, only the weld metal goes through the re-crystallization process, so the formed welding is completely the same chemistry as the base metal. Welded steel after annealing treatment, the cold working internal stress and welding internal stress are improved, so that the straight seam ERW steel pipe with good comprehensive mechanical properties. 　　LSAW steel pipe is made by hot-rolled steel plate as raw materials and doing longitudinal welded in the high-frequency welding equipment. In the welding process it will add some filler and particle protection flux to doing submerged arc weldin...

　　As per my last news, you could mentioned there it’s a seamless carbon steel pipe . But how many details you know about the seamless carbon steel pipe? It doesn’t matter if you are blind to this, as Great Steel Pipe would like to share the main standards and uses for all of you. 　　The general carbon seamless tube is made with 10, 20, 30, 35, 45 or others high-grade carbon structural steel; 16Mn, 5MnV or others low alloy carbon structural steel; or made with 40Cr, 30CrMnSi, 45Mn2, 40MnB alloy steel through hot/cold rolling. It has an important position in China's steel industry. The below is the main standards and uses of it. 　　ASTM A 53 specification for black steel seamless pipes 　　ASTM A 106 Gr. B seamless carbon steel pipes?for high-temperature service 　　ASTM A 161 seamless low-carbon and carbon molybdenum steel still tubes for refinery service 　　ASTM A179 specification for seamless cold-drawn low-carbon steel heat-exchanger and condenser tubes 　　ASTM A192 specifica...

　　Because they are stacked outdoors, and most of the steel pipes are buried in the ground, they are easy to corrode and rust. In order to ensure the smooth flow of the pipe, the spiral submerged arc pipe must have strong corrosion resistance. Once the pipeline is corroded, oil and gas leakage will occur, which will not only interrupt the transportation, but also pollute the environment and may even cause fire and damage. Spiral tube manufacturers tell you about the factors that cause spiral tube corrosion: 　　1. Anti-corrosion failure. When the pipeline is erected, it is necessary to do anti-corrosion work or directly use anti-corrosion spiral steel pipe. The reason for the corrosion of the pipeline is because the anti-corrosion layer of the pipeline has been damaged. Once the anti-corrosion layer and the surface of the pipe are detached, it will naturally cause corrosion failure. This is also the ladder type we must use anti-corrosion spiral tube when purchasing the spiral tube. 　　...