LSAW Steel Pipe

　　 Galvanized Steel Pipe Solvent Treatment 　　1, the steel pipe into the solvent tank, the tape to relax all the steel immersed in the solvent, does not allow the steel pipe surface exposed solvent surface. Such as steel pipe at both ends do not take bubbles so far, and then lifting the side of the pipe vibration up, lifting the steel pipe control solvent into the drying rack. 　　2, steel pipe in the solvent treatment process, the tilt angle of steel pipe is not greater than 15 °. 　　3, the pipe immersed in the solvent time of 60 to 120 seconds, on duty back to the tube soak 3 to 5 minutes, successor to the plating tube soak 5 to 10 minutes. 　　4, solvent temperature: keep the solvent clean at room temperature. 　　5, the solvent-treated steel pipe, do not stick to other dirt, do not pour Sheung Shui, placed in the drying platform balance; placed on the drying bench steel pipe, pipe is not allowed to go to the top, such as must be up , The feet must be coated with ammonium chlorid...

　　Before choosing which type of metal to use for an industrial project, the first thing that you should consider is the magnitude and scale of the task, what type of liquid or gas the pipes will be carrying and the longevity of structure. Once that has been established, you can then answer questions to what type of metal to use for the piping. 　　For example, due to its strength and versatility, steel is one of the most popular materials used for pipe and pipe fittings. Even better, different material, like carbon or chrome, can be added to steel to obtain a specific desired effect. Here are a few reasons why it may be beneficial to invest in carbon steel pipe fittings and valves for your next commercial project. 　　1. Super Strength 　　Because of its strength and durability, steel has been one of the most commonly used materials for industrial piping and other types of construction. However, with the addition of carbon to the already strong metal, it has the ability to turn into a ...

　　Hot Dip Galvanizing Drying Process 　　1, the solvent treatment of qualified steel tube placed on the drying receiving platform, the steel side on the same side of the zinc pot on the front side and the second magnetic roller at right angles to the front; bent large tube on the back Or straightened on the receiving frame. 　　2, drying kang main role is to steel surface moisture drying, on the other hand is to enhance the temperature of the steel pipe itself, to prevent the sputtering of zinc hurt people, not take away the heat inside the zinc pot to promote zinc-iron alloy layer to speed up the generation . 　　3, drying kang temperature of 80 ℃ ~ 180 ℃, steel pipe drying time of 3 to 7 minutes, but also according to the specifications of steel pipe, wall thickness to master the different drying temperature; drying workers at any time to check the dryness of steel to prevent time Insufficient zinc spray into the liquid zinc injury; drying not over-temperature, to prevent the solvent...

　　The advantages of hot-dip galvanizing 　　1, the processing cost is low: the cost of hot-dip galvanized anti-rust coating than other low cost of paint; 　　2, durable: in the suburban environment, the standard hot-dip galvanized anti-rust thickness can be maintained for more than 50 years without having to repair; in urban or coastal areas, the standard hot dip galvanized layer can be maintained for 20 years without repair ; 　　3, the reliability is good: galvanized steel pipe and steel is metallurgical combination, as part of the steel surface, so the durability of the coating is more reliable; 　　4, the coating toughness: galvanized layer to form a special metallurgical structure, this structure can withstand the mechanical damage during transport and use; 　　5, a comprehensive protection: plating of each part can be plated with zinc, even in the depression, sharp corners and hidden place can be fully protected; 　　6, save time and effort: galvanizing process than other coatin...

　　 Hot Dip Galvanized Products 　　With the development of industry, hot-dip galvanized products have been applied to many areas, the advantages of hot-dip galvanizing corrosion is a long time to adapt to the environment has been widely popular anti-corrosion treatment. Widely used with the power tower, communications tower, railway, road protection, road poles, marine components, building steel structures, substation ancillary facilities, light industry. 　　Hot galvanized anti-corrosion long years, but in different environments not the same as the anti-corrosion environment: heavy industrial zone 13 years, 50 years of the ocean, the outskirts of 104 years, the city 30 years. 　　Hot dip galvanizing principle: the iron pieces clean, and then solvent treatment, drying, immersed in zinc liquid, iron and molten zinc reaction to form an alloying zinc layer, the process is: degreasing - washing - pickling - Assisted plating - drying - hot dip galvanizing - separation - cooling passivation...

　　Welding is critical to the quality of high-frequency welded pipes, and the frequency of high frequency welding has a great impact on welding, because the high-frequency's frequency affects the distribution of current within the steel plate. 　　The impact of high or low selected frequency of welding mainly acts on affecting the size of the weld heat affected zone. From the welding efficiency, pipe manufacturers should use a higher frequency as far as possible. 100KHz high-frequency current can penetrate 0.1mm ferrite steel, but 400KHz can only penetrate 0.04mm, which means that the current density distribution on the surface of the steel plate of the latter is nearly 2.5 times higher than the former. 　　In the production practice, pipe manufacturers generally choose 350KHz ~ 450KHz frequency when welding carbon steel material. When welding alloy steel material, and welding more than 10mm thick steel plate, pipe manufacturers can use 50KHz ~ 150KHz low frequency, because the skin...

　　Steel pipe has a variety of production processes. High-frequency welding technology is one of them, it usually used by pipe manufacturers to produce ERW steel pipe . Actually, high-frequency welding can be divided into two ways, resistance welding and IWinduction welding. 　　What is resistance welding? 　　The resistance welding is carried out by using a pair of copper electrodes to contact on both sides of the welded steel pipe, induction current penetration is good, the two effects of high frequency current are maximized using since the copper electrode directly contact with the steel plate. The welding efficiency of the resistance welding is high and the power consumption is low, so it is widely used in the production of high speed and low precision pipe. And in the production of special thick steel pipe, it is also necessary to use resistance welding. 　　But there are two shortcomings in resistance welding: first, copper electrode is in touch with steel plate, so it will wear q...

　　Some novices don’t know ERW tubes standards, when they try to buy steel pipe for the first time, they usually feel puzzled. So, there is a brief introduction of Prime’s ERW steel pipes specifications for all of you, including application, specification, standard & grade, end, surface, and packing. 　　The application of ERW steel pipe : 　　For low pressure fluid transmission, such as water pipelines, agriculture & irrigation (water mains, sewerage systems,industrial water lines, ;ant piping, deep tube-wells & casing); 　　For machinery manufacturing, such as engineering purpose, fencing, scaffolding, line pipes etc.; 　　For Gas pipe lines (pipe lines for natural gas), LPG and other non-toxic gas. 　　The specification of ERW steel pipe provided by Prime Steel Pipe: 　　OD (Outside Diameter): 21.3mm ~ 660mm 　　WT (Wall Thickness): 1mm ~ 17.5mm 　　Length: 0.5mtr ~ 22mtr (5.8/6/11.8/12 meters, SRL(Single the length, the nominal length is 40FT, 12m), DRL(Double the length...

　　Spiral steel pipe, also called SSAW steel pipe or spiral welded spiral pipe, are made by hot rolled strip, it is made by extrusion forming under the normal temperature, and then welded by taking the technology of double wire and double-faced submerged-arc. 　　During molding process of spiral welded steel pipe, steel plate has uniform deformation and light residual stress, thus the surface has no scratches. Spiral steel pipe has more flexible thicknesses and diameters, especially in making high-grade thick pipes with small or medium aperture, these techniques has incomparable advantages in satisfying your needs. 　　Spiral steel pipe can be widely used in the production of large diameter spiral tubes for the following reasons: 　　1) as long as changing the forming angle, we can use the same width of the strip steel to produce a variety of caliber spiral pipe; 　　2) Since spiral welded steel pipe is formed by the continuous bending, the specified lengths of spiral steel pipe is not...

　　long-distance oil/gas pipeline is an important way of energy security, in the oil (gas) pipeline anti-corrosion construction process, the surface treatment of high-frequency welded steel pipe is one of the key factors to determine the useful life of the pipeline. It is the premise that the erosion resistant coating can be firmly bonded to the steel pipe. According to the research institutions, the life of the erosion resistant coating depends on the coating type, coating quality, construction environment and other factors. The surface treatment of steel pipe accounted for about 50% on the life of the erosion resistant coating. therefore, we should be strictly in accordance with the requirements specification of erosion resistant coating to steel pipe surface, continue to explore and summarize, and constantly improve the surface treatment of steel. 　　 1. Cleaning 　　Using solvents and emulsions to clean the surface of steel to achieve the removal of oil, grease, dust, lubricants a...

　　In 1940 the United States first use UOE method to produce large diameter LSAW steel pipe . In the early 1950s, the United States built a LIOE pipe workshop with a diameter of 607 to 915 mm. 1955 ~ 1967 years of Europe, the United States, Japan UOE welded pipe construction workshop, the diameter of its pipe range of 406 ~ 1067mm, the maximum length of steel pipe is 12m. From 1967 to 1976, the maximum diameter of welded steel pipe was 1626mm, the pipe wall thickness was 40mm, the length of pipe was 18m, and continuous pre-welding and automatic nondestructive testing and automatic control were used in Germany and Japan. 　　Design scale and product program UOE pipe workshop design scale is generally 40 to 110 million t/a, the main varieties of high-quality carbon steel pipe, steel pipe yield strength of 750MPa, product specifications for the diameter of 406 ~ 1626mm, wall thickness 6. 4 ~ 40mm, length up to 18m. 　　Process UOE pipe material for the thick and thick steel plate, planing ...

　　 Seamless steel pipe is a hollow section, the surrounding no seam of the long steel. The steel pipe has a hollow section, a large number of pipes used to transport fluid, such as the transmission of oil, natural gas, gas, water and some solid materials pipeline. 　　Steel and round steel and other solid steel compared to the same bending strength, the weight is light, is an economic section of steel, widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, car drive shaft, bicycle Racks and steel scaffolds for construction purposes. 　　The use of steel pipe manufacturing ring parts, can improve the utilization of materials, simplify the manufacturing process, saving materials and processing time, such as rolling bearing rings, jack sets, etc., has been widely used to manufacture steel. Steel pipe or a variety of conventional weapons indispensable materials, barrels, barrels and so on to steel to manufacture. Steel pipe by cross-sectional area...

　　In the welding process of high-frequency steel pipe, due to the combination of skin effect, proximity effect and heat conduction, the temperature distribution gradient near the edge of the tube blank is formed, forming a melting zone, a partial melting zone, an overheated tissue zone, a normalizing zone, Incomplete normalized area, tempered area, and other characteristic areas. Among them, the microstructure of the superheated zone is higher than 1100 °C, the austenite grains grow sharply, and the grains are coarse after cooling. A hard and brittle phase is formed under certain chemical composition and cooling rate. In addition, welding stress is also generated due to the presence of a temperature gradient. As a comprehensive result, the overall mechanical properties of the weld zone are lower than that of the parent metal. The physical seamlessness of the welded pipe is through the heat treatment of the weld to achieve the purpose of eliminating stress, homogenizing and refining the...

　　We have mention the definition of hot rolling seamless steel pipe previously, today, Prime Steel Pipe will continue to talk about the advantages and disadvantages of hot rolling seamless steel tube with all of you. 　　Advantages of hot rolling seamless steel pipe 　　Can damage the ingot casting organization, refine the grain of steel, and eliminate the defects of microstructure, so that the steel structure is dense, mechanical properties improved. This improvement is mainly reflected in the rolling direction, so that the steel to a certain extent is no longer an isotropic body; pouring the formation of bubbles, cracks and loose, but also in the high temperature and pressure under the welding. 　　Disadvantages of hot rolling seamless steel pipe 　　1. After hot rolling, non-metallic inclusions (mainly sulfides and oxides, as well as silicates) inside the steel are pressed into flakes and delamination (interlayer). Stratification makes the performance of the steel in the thickness ...

　　 Stainless steel pipe elbow has excellent corrosion resistance, stainless steel surface thin and strong oxide film so that all stainless steel in all water quality has excellent corrosion resistance, even buried also has excellent corrosion resistance. So it is suitable for a variety of water quality, in addition to disinfection and sterilization, do not need to control the water quality, at the same time, there is no corrosion and excessive exudate, to maintain clean water quality, to prevent secondary pollution, can withstand up to 30 meters per second the impact of high water flow. 　　Many people think that stainless steel material is of course not rusty steel, it is true. Stainless steel pipe elbow rust mechanism is the formation of dense alloy oxide film, isolated oxygen contact to prevent the continuation of oxidation. So stainless steel is not "stainless". Stainless steel has the ability to resist atmospheric oxidation --- that is, stainless steel, but also in the ...

　　The service life of spiral steel tube is mainly related to the operation environment and production technology. If the application environment of spiral steel pipe is poor, in order to prolong its service life, the outer wall and inner diameter of the steel pipe need to be treated with anticorrosion. 　　Coated spiral steel pipe refers to a steel pipe processed by anti-corrosion process, which can effectively prevent or slow down the corrosion phenomenon caused by chemical or electrochemical reaction during transportation and use. Coated spiral steel pipe can effectively prevent or slow down corrosion, prolong the service life of steel pipe and reduce the operation cost of steel pipe. 　　At present, the most widely used anti-corrosion methods for pipelines are 3PE composite structure, single-layer powder epoxy, PF type Cold-winding tape and RPC type Cold-winding tape. 　　1. Petroleum asphalt, with wide raw materials and low prices. However, the working conditions are poor, the qual...

　　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 in accordance with YB 822. 　　(2) The steel pipe joints should be consistent with the provisions of YB 238...

　　1. The stacking principle requirements of SSAW steel pipe is stable and ensuring the safety, so we should stacking SSAW steel pipe according to specifications, different varieties, different materials, and different specifications SSAW steel pipe should be stacking respectively, to prevent muddy and mutual erosion. 　　2. SSAW steel pipe is prohibited in the steel pipe stacking around the location of the erosion of steel pipe objects. 　　3. SSAW steel pipe bottom should be high, strong, smooth, to prevent the material damp or deformation. 　　4. The same kind of material SSAW steel pipe should be stacking in accordance with the order of storage in order to facilitate the implementation of the principle of improving the predecessors. 　　5. If the SSAW steel pipe in the open space, must be under the spiral pipe to prevent the wooden mat or stone, etc., and the stack should be slightly inclined to facilitate drainage, and pay attention to whether the steel pipe is straight to prevent...

　　Poor quality SSAW steel pipe is easy to produce burrs, because some inferior manufacturers have tinpot equipment. Prime Steel Pipe is positioned as an excellent steel pipe manufacturer and exporter for carbon steel pipe, we have over 20 years to manufacture SSAW steel pipe. So the SSAW steel pipe produced by Prime Steel Pipe all have the best quality, you can trustingly choose our spiral welded pipe. Generally, burrs will scratch the appearance of SSAW steel pipe and is easy to fold, the tendons are thin and low. and often appear full of dissatisfaction with the phenomenon. The reason is that the manufacturers to achieve a large negative tolerance, waste a few Road before the reduction of the amount of large, iron type is small, well filled dissatisfaction. Prone to crack. The reason is that the blank is the adobe, the adobe pores and more, adobe in the cooling process due to the role of thermal stress, cracks, after rolling there are cracks. 　　SSAW steel pipe regularly appear qua...

　　 Precision steel pipe is a kind of steel pipe that inside and outside of the wall are without oxidation layer, withstand high pressure without leakage, high precision, high finish, cold bending is not deformed, flaring, flattening no cracks and so on. The main advantage of seamless precision steel tube is characterized by a smaller diameter, high precision, high precision, good surface quality, better performance, more dense metal. It has strict requirements on the pipe body bore, the outer wall size and the tolerance and roughness. Seamless precision steel pipe is mainly used for mechanical structure, hydraulic equipment, hydraulic and pneumatic cylinder manufacturing. 　　The characteristic of seamless precision steel tube: 　　1. Finished tube size accuracy, internal and external diameter can be accurate to within 0.05mm. 　　2. Internal and external surface finish is good. 　　3. There is no oxide film on the inner and outer surfaces of the precision tube after cold rolling. 　...