LSAW Steel Pipe

　　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 ...

　　It is suitable for low pressure and temperature of the meson, seamless steel pipe usage in many aspects, such as high temperature and pressure for mesons, high quality requirements for fluid leak-proof, and the choice of seamless steel tubes for fear of pollution. Seamless steel pipe usage but also in terms of building structures for machining, different materials, different strengths, different thickness, different specifications, different precision, seamless pipe joints are better , according to need. 　　Since the 1930s, the development of high-quality steel rolling production and testing technology very quickly and gradually improve the quality of welding, welded steel varieties and specifications are constantly increasing, and more and more areas to be applied. Seamless steel pipe usage is lower than cost, high production efficiency. The steel pipe diameter and wall thickness ratio of less than 20 is called thick-walled steel pipe. The seamless steel pipe usage is suitable for...

　　 Welded steel pipe is bent with steel or steel plate is round, square and other shapes and then welded into the surface of the seam with the steel pipe. Common types of welded steel pipe are the following: 　　General pipe, used to transport low-pressure fluid, easy to weld the other soft steel manufacturing. Steel pipe to pipe and thick steel pipe specifications with the nominal mouth of the water pressure, bending, flattening and other experiments, the surface quality has certain requirements, usually the length of the delivery of 4-10m is actually different, the pipe according to the provisions of the wall thickness Two kinds of steel, according to the thread and no thread two. 　　Roller, for belt conveyor roller welding steel pipe, the general water pressure and flattening test. 　　Metric welded pipe, specifications with a seamless tube form, with ordinary carbon steel, high quality carbon steel or Cape can be low-alloy steel tropical, cold belt welding, or with a tropical wel...

　　The seamless pipe line is mainly used for pumping high pressure oil and gas near the wellhead. As the corrosion problem of hydrogen sulfide is becoming more and more serious, the development of anti-sulfur seamless pipeline tube is urgent, and the anti-sulfur performance is the key. Discusses the influence of hydrogen induced crack (HIC) resistance of medium and material factors, Cu, Ni join can improve the performance of seamless line pipe material HTC reduce the S content in the steel, by spraying calcium silicon powder also can reduce the sensitivity of hydrogen bubble. 　　With the development of oil and gas exploration, the problem of hydrogen sulphide corrosion is very acute because of the increasing amount of oil and gas Wells in the complex and sulfur environment. In recent years, there has been an increase in demand for the seamless pipe line. The seamless pipeline pipe is mainly used for pumping high pressure oil and gas near the wellhead, and it is made by seamless tube p...

　 　Cold rolling seamless pipe 　　Cold rolled seamless pipe is a seamless steel pipe for high dimensional accuracy and good surface finish. Cold rolled seamless pipe in addition to include the general steel, low and medium pressure boiler tube, high-pressure boiler tubes, alloy steel pipe, stainless steel pipe and oil cracking tube, also includes carbon thin wall steel pipe, alloy thin wall steel tube, thin-walled stainless steel pipe and special-shaped steel tube. The diameter of cold rolled seamless steel pipe is 6mm, wall thickness is 0.25mm, while the diameter of thin-walled tube can be 5mm, wall thickness can less than 0.25mm. The dimensional accuracy of cold rolling is higher than that of hot rolling. 　　 Hot rolling seamless pipe 　　Hot rolling is relative to the cold rolling. Cold rolling carries on rolling below the temperature of recrystallization, and hot rolling is above the recrystallization temperature. Hot rolled seamless steel pipe is generally divided into low, medi...

　　In order to verify the mechanical properties of seamless steel pipe to meet the requirements of the standard, the test sample of seamless steel pipe mechanical performance should be prepared carefully. Mechanical property test includes tensile strength, yield strength, elongation, impact energy and so on. Process performance test includes flattening test, flaring test, hydrostatic testing, curling trials, cold bend test, perforation test. These test items are based on different standards and different uses of seamless steel tubes. 　　Non-destructive testing of seamless steel pipe 　　Under the premise of not damaging the specimen, NDT refers to carry out inspection and testing to internal and surface structure, properties, status of specimen with physical or chemical methods, advanced technology and equipment. The development of non destructive testing technology has experienced three stages: Nondestructive detection, nondestructive testing and nondestructive evaluation. 　　Nondes...

　　1, High-quality seamless pipes of uniform composition, high cold shear tonnage, smooth and neat end face of the cutting head, and inferior materials due to the poor material, cut the first end surface there are often off the meat of the phenomenon that is uneven, and no metallic luster. And because of inferior materials manufacturers cutting products less head, head and tail will be a big ears. 　　2, Inferior seamless pipes without metallic luster, pale red or similar color of pig iron, there are two reasons for it blank is adobe. Inferior-rolling temperature is not standard, they are visually steel temperature, so can not be carried out according to the provisions of the austenitic region of rolling, thick-walled seamless performance naturally can not be reached. 　　3, Thick-walled seamless Inferior material containing impurities, the density of steel is small, and size tolerance serious, so without a vernier caliper case, you can check it weighed. 　　4, Thick-walled seamless pi...

　　There are various kinds of steel pipes both in domestic and international markets for your selection, like the welded steel pipe . The steel pipe can be used as the long-distance oil and gas pipeline actually which can ensure the energy security actually. However, the surface of the stee pipe should be treated with great care to avoid the corrosion. 　　Although the surface can''t determine the corrosion totally, it has great influence except the weather condition, enviromental factors, coating type, quality and so forth. Hence, it is of great importance to learn how to coat the steel pipe in a simple but effective way. For example, you are advised to clean it very carefully. In order to remove the grease, oil, dust, lubricants, you are advised to use solvent, emulsion to clean the steel surface actually. However, such cleaning can''t help remove the surface rust, oxide, welding flux and so forth. So, you may need a steel wire brush and other tools to polish the steel...

　　1. Extra length of tool joints provides plenty of space to operate while reducingwear rate and extending the service life of the outer diameter. 　　2. In order to extend the service life of the connection, API Bore Back Box adopts the larger size, whose function is four times as large as the other entire box. 　　3. The entire centre upset protects the tube from outer diamete wear by keeping the tube away from the hole wall, while at the same time reducing the risk of differential sticking. 　　4. HWDP with the drill pipe elevator can quickly and effectively deal with the task of drilling platform. 　　5. Research shows that 95% of the cause for drill string failure can be attributed to fatigue failure. However, the structure of HWDP has high fatigue strength.

　　Carbon steel pipes can be classified into low carbon steel, medium carbon steel and high carbon steel according to chemical composition (ie, carbon content). Low carbon steel, also known as mild steel, contains from 0.10% to 0.30% carbon. Low carbon steel is easy to accept in various processes such as forging, welding and cutting. It is commonly used in the manufacture of chains, rivets, bolts, shafts, etc. 　　Medium carbon steel refers to carbon steel with a carbon content of 0.25% to 0.60%. There are a variety of products such as killed steel, semi-killed steel, boiling steel. In addition to carbon, it may contain a small amount of manganese (0.70% to 1.20%). In addition to being used as a building material, it is also used in large quantities to manufacture various mechanical parts. High carbon steel is often called tool steel and contains carbon from 0.60% to 1.70%. Such as drill bits, wire taps, reamers, etc. are made of steel with a carbon content of 0.90% to 1.00%. 　　Introd...

　　Great Steel Pipe tells you, to identify that a pipe supplied is seamless stainless steel pipe or ERW stainless steel pipe, simply read the stencil on the side of the pipe. If it is ASTM A53, Type S means seamless. Type F is furnace but welded, type E is Electrical resist welded. 　　The difference between seamless stainless steel pipe and ERW stainless steel pipe: 　　1. ERW steel pipe is manufactured by rolling metal and then welding it longitudinally across its length. Seamless pipe is manufactured by extruding the metal to the desired length; therefore ERW steel pipe have a welded joint in its cross-section, while seamless pipe does not have any joint in its cross-section through-out its length. 　　2. In Seamless steel pipe, there are no welding or joints and is manufactured from solid round billets. The seamless pipe is finished to dimensional and wall thickness specifications in sizes from 1/8 inch to 26 inch OD. Applicable in for High-pressure applications such as Hydrocarbon...

　　Advantages of LSAW steel pipe will be contained as follows: 　　1. Compared with the LSAW steel pipe, the welding line of SSAW steel pipe is poor, the stresses concentration phenomenon is serious. 　　2. The manufacturing process of SSAW steel pipe determines that the residual stress of it is greater than that of LSAW steel pipe. LSAW steel pipe uses overall expansion process, the residual stress closes to zero, and the SSAW steel pipe can not do this. 　　3. For the same diameter, the thickness of the pipe SSAW steel pipe may reach is much smaller than the LSAW steel pipe, such as the thickness of LSAW steel pipe is generally 6 ~ 25mm, the maximum thickness of it can up to 45mm, while the wall thickness of SSAW steel pipe can only reach 18mm. 　　4. The weld offset of SSAW steel pipe is mainly in range 1.1 ~ 1.2mm, the standard requires that the weld offset must be less than 10% of the wall thickness. For thin-walled SSAW steel pipe, the weld offset is difficult to meet the standar...

　　Black steel pipe is similar to galvanized steel pipe . Black steel pipe and galvanized pipe all use steel as raw material. And general speaking, galvanized steel pipe is more expensive and more durable since galvanized pipe has a zinc coating while black pipe does not. Galvanized pipe covered with a layer of zinc which makes it have higher ability of corrosion protection and help to prevent the accumulation of mineral deposits that will block the pipe.This will lead to a burst. So galvanized steel pipe is more suitable for carrying water instead of gas. 　　For transportation, galvanized pipe is mainly used for carrying water to supply home and commercial buildings. It is also serve as scaffolding frames because of its rust prevention. Black steel pipe is manufactured as seamless which makes it a better type for gas transportation. It can be used for fire sprinkler system since it can prevent fire better than galvanized pipe. Since it has a dark color surface that is form by iron oxi...

　　 SSAW steel pipe regularly appear quality problems in the production and use. So we need to identify the quality of SSAW steel pipe, in accordance with a certain way and performance testing, can be used in the actual use of an important role. Then how to identify fake spiral steel pipe method: there often are pimple phenomenon in appearance. In general, the overall effect of weighing will be better, mainly taking into account the cumulative error and probability theory of this problem. Pitted surface is due to the serious wear and tear caused by the uneven appearance of spiral steel pipe irregular irregular flaws. As the shoddy SSAW steel pipe manufacturers to pursue profits, often rolling the most rolling standard. Appearance easy to produce scar. 　　Poor quality SSAW steel pipe is easy to produce burrs, because some inferior manufacturers have tinpot equipment. Generally, burrs will scratch the appearance of SSAW steel pipe and is easy to fold, the tendons are thin and low. and o...

　　Great Steel Pipe shares the types of rotary contact wheel welding for all of you. In rotary contact wheel welding, the electrical current is transmitted through a contact wheel at the weld point. The contact wheel also applies some of the forge pressure necessary for the welding process. The three main types of rotary contact wheel welders are AC, DC, and square wave. In all three power supplies, electrical current is transferred by brush assemblies that engage slip rings attached to a rotating shaft that supports the contact wheels. These contact wheels transfer the current to the strip edges. 　　AC Rotary Contact Wheel Welding. In an AC rotary contact wheel welding machine, the current is transferred through the brushes to the rotating shaft, which has a transformer mounted on it. The transformer reduces the voltage and increases the current, making it suitable for welding. The two legs of the transformer's output circuit are connected to the two halves of the rotating contact...