LSAW Steel Pipe

　　The oil industry is an industry that uses a large number of oil pipes . Oil pipes play an important role in the oil industry: 　　1. The oil pipe has a large amount of consumption and spends a lot of money, and has great potential for saving expenses and reducing costs. The consumption of oil well pipes can be calculated based on the annual drilling scale. According to the specific conditions of China, 62kg of oil well pipe is required for every 1m drilled, including 48kg casing and 10kg oil pipe. Drill pipe 3kg, drill collar 0.5kg; 　　2. The mechanics and environmental behavior of petroleum pipelines have an important impact on the adoption of advanced technologies and increased production and efficiency in the petroleum industry; 　　3. The loss of oil pipe failure is huge, and its safety, reliability and service life are of great importance to the petroleum industry. 　　Different types of casing used in oil extraction: Surface oil casing protects the well from contamination by s...

　　The oil casing pipe is a large-diameter pipe that acts as a fixed oil and gas well wall or wellbore. The casing pipe is inserted into the wellbore and cemented to help the wellbore separate the formation and prevent the wellbore from collapsing, while ensuring that the drilling mud circulates for drilling. 　　1. first grasp the water quality standards, strict water quality testing and management. Implement decontamination and re-injection, strengthen the cleaning of the main water pipeline, achieve the standard water quality in the station and the bottom of the well, and reduce the introduction of corrosion sources into the annular space; 　　2. For the water injection wells that have been newly put into operation, adopt an annulus protection liquid based on dosing and sterilization, and form a system to regularly add; 　　3. In view of the acceleration of the corrosion of the oil casing pipe by mechanical abrasion, it is recommended to add a rubber ring to the oil pipe coupling or ...

　　These steels have corrosion and heat resistant applications. A 3-digit numbering system that is used to identify them. The last 2 numbers have no special meaning, but the first indicates the group to which it belongs as follows: 　　CHARACTERISTICS OF STAINLESS STEEL 　　1.Corrosion resistance and high ductility 　　2.They have high chromium content 　　3.They develop the passivation process 　　They are the stainless steels to Chromium-Nickel (3xx series) and Chromium-Nickel-Manganese (2xx series), which are austenitic; They are essentially non-magnetic in annealing condition and do not harden by heat treatment, only by cold deformation. Resistant to impact and corrosion. 　　They are mainly steels with only between 11.5 and 18% Chrome. They are magnetic, have good toughness, great resistance to corrosion in the treated state. 　　This group of stainless steels with only Chrome have approximately 14 to 27% Chrome. They cannot be hardened by heat treatment, only moderately by cold d...

　　At present, when we talk about steel pipes , we have to take into account that they are widely used in any type of industry and work. This is thanks to its excellent quality, its different applications and its characteristics, which make these pipes indispensable in any work. Therefore, if you still do not know them, today we come to tell you the types that exist, their different uses and their characteristics. Take note! 　　TYPE OF STEEL PIPES: 　　In the market there are several types of steel pipes: 　　Seamless: These pipes are manufactured through the passage of liquid steel through a rod to create a hollow tube. 　　With seam: they are manufactured through sheet bending and welding seams. 　　CHARACTERISTICS OF STEEL PIPES: 　　Steel pipes are strong, firm and durable, thanks to the material they are made of. 　　They are able to withstand extreme temperature changes. 　　They resist a lot of pressure and destructive elements 　　They are ideal for any industry 　　Contains al...

　　Steel is divided into four categories, namely: plate, tube, type, wire. Steel is one of these four categories. Our daily steel is divided into simple section steel and complex section steel according to the shape of the section. Our well-known 304 stainless steel plate can also be a type of steel. Below we introduce the four common types of steel. 　　1. The section steel of general square section, which we call square steel, is mainly divided into two categories: cold rolling and hot rolling. In terms of size, the side length of hot rolled square steel is 5-250mm, and the length of cold drawn square steel is 3 -100mm. 　　2. The round section steel is called round steel and is divided into three categories: cold rolling, forging and cold drawing. The diameter of hot rolled round steel is 5-250mm, and the diameter of cold drawn round steel is 3-100mm. The progress of size is generally better. high. 　　3, flat steel can be used directly as finished steel, can also be used for weldin...

　　 Boiler tube hardness is one very important factor to determine the quality of high pressure boiler tubes. 　　First, it must be considered to detect the mechanical properties of hardness high pressure boiler tubes, because it is the relationship between the performance and quality of deformation, punching, cutting and other processing problems. So first of its hardness testing should detect its mechanical properties. Detection methods generally tensile test and hardness test. Tensile test, that is, to the high-pressure boiler tube sample preparation, but also in a tensile testing machine will stretch until the specimen breaks, so you can measure the tensile strength of the high-pressure boiler tubes, yield strength, elongation after fracture and reduction. Tensile tests in the metallic material is often carried out detecting means, is not easy for many hardness test, tensile test must be carried out. There are several hardness test method: like scarification, pressed into law, powe...

　　Ceramic pipe with conventional steel, wear-resistant alloy steel pipe, cast stone and plastic pipe, steel pipe and other rubber has the essential difference. Ceramic pipe is steel outer and inner corundum. Corundum layer Vickers hardness 1100-1500 (Rockwell hardness of 90-98), the equivalent of tungsten-cobalt hard gold. High wear resistance than carbon steel pipe more than 20 times, it is much more superior than the usual bonding together corundum wheel performance. Now it is still a variety of corundum grinding wheel grinder cut hardened steel main wheel. Ceramic pipe corundum corundum wheel wear layer can be put away. Wear resistant ceramic pipe corundum layer may be formed mainly by a few millimeters thick, a Mohs hardness of 9, second only to diamond and silicon carbide, all oxides, which is the highest hardness. ? pipe and the component is only about 20% alumina, most of SiO2, SiO2 Mohs hardness of 7. Rare high chromium wear-resistant alloy tube or a Vickers hardness of about ...

　　Seamless welding may be employed depending on the type of gas, gas welding specific situation, there is used a shielding gas carbon dioxide, argon, helium, hydrogen, and mixed gases. GMAW advantages are: linear arc good, easy, easy to implement all-position welding and automatic welding; arc heat concentrated, small bath, welding speed, heat-affected zone is narrow, weldment distortion, cracking capacity Strong and good weld quality. The disadvantage is not on a windy site welding, arc light radiation is strong. 　　Seamless welding technology, welding device is a function of the device through a transistor current electricity 50/60Hz frequency 20KHz or 40KHz into a high-frequency electric power supply to the converter. Mechanical vibration welding head is directly transferred to an acoustic device requires lamination products. Vibration friction generated heat can melt plastic welding work pieces pass through the adhesive surface vibration, but its strength is close to a piece of we...

　　It is predicted that due to weak market demand, the domestic domestic production of hot rolled steel will decline this year. In the first half of the year, the domestic production of hot-rolled steel sheets in Korea was 6.048 million tons, a decrease of 4.8% year-on-year. 　　The main reason for the reduction in production is the large-scale maintenance of related equipment, especially in September and October. Another reason is the recent weakening of demand in the domestic market in Korea. In the second half of this year, in addition to the small rebound in market demand in the construction industry, the consumption prospects of other downstream steel industries are bleak. However, considering the intensification of trade tensions between Japan and South Korea, South Korea may cut imports of hot-rolled steel sheets, cold-rolled steel sheets and pipes from Japan. Therefore, Korean hot-rolled steel sheet producers can appropriately adjust their production plans for the second half of...

　　Hydraulic steel pipe is basically divided into the hydraulic system with fluid pipe and oil cylinder, also known as honing tube, and cold drawn or cold rolled precision seamless steel pipe also contains hydraulic tube. 　　Hydraulic pipe after finishing, no oxidation bright heat treatment of raw materials (NBK), nondestructive testing, steel pipe inner hole through high pressure washing, pickling, block on both ends of the steel tube inside and outside wall with anti-rust oil antirust processing, used as a dustproof.To produce steel pipes with high precision, finish good, tube inside and outside wall without oxidation layer, steel pipe can bear the high pressure of fluid flow through, and the steel tube cold bending deformation, flaring, flattening without cracks.Mechanical properties can be bending deformation under any Angle. 　　Technical standard 　　As in the standard DIN2391-1. Hydraulic steel raw materials through fine drawing, bright heat treatment without oxidation (NBK sta...

　　The first is the annealing temperature (the annealing temperature is the temperature parameter when the primer and the template are combined. When 50% of the primers and complementary sequences are expressed as double-stranded molecules, it is an important factor affecting PCR specificity. Under ideal conditions, the annealing temperature is low enough to ensure that the primers are effectively annealed to the desired sequence, while still being high enough to reduce non-specific binding. Reasonable annealing temperatures range from 55°C to 70°C. Annealing temperatures are generally set 5°C lower than the Tm of the primers. 　　Whether the specified temperature is reached. Large-scale flange treatment is generally carried out by solid solution heat treatment, which is commonly called "annealing", and the temperature range is 1040~1120°C (Japanese standard). You can also observe through the observation hole of the annealing furnace. The large flange fittings in the annealin...

　　1. The cross section is different: the cross section of the square tube is square; the cross section of the rectangular tube is rectangular. 　　2. different uses: 　　The use of square tubes: construction, machinery manufacturing, steel construction projects, shipbuilding, solar power brackets, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automotive chassis, airports, boiler construction, highway railings , building construction, pressure vessels, oil storage tanks, bridges, power station equipment. 　　The use of the rectangular tube: a large number of pipes used to transport fluids, such as petroleum, natural gas, water, gas, steam, etc. In addition, when the bending and torsional strength are the same, the weight is light, so it is also widely used in the manufacture of mechanical parts. And engineering structure. Also used to produce a variety of conventional weapons, barrels, shells and soon. 　　3, the ...

　　A seamless elbow is a type of pipe used for turning a pipe. Among all the pipe fittings used in the pipeline system, the proportion is the largest, about 80%. Generally, different forming processes are selected for elbows of different material wall thicknesses. Currently. Seamless elbow forming processes commonly used in manufacturing plants include hot push, stamping, extrusion, etc. 　　The raw material of the seamless elbow pipe fitting is a round pipe blank, and the round pipe embryo is cut into a blank having a length of about one meter by a cutting machine, and is sent to the furnace for heating through a conveyor belt. The billet is fed into a furnace and heated to a temperature of approximately 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a key issue. After the round billet is released, it is subjected to a through-hole punching machine. The more common perforating machine is a conical roller punching machine. This perforating machi...

　　 Seamless steel pipe for structural use in general structure and mechanical structure, a large number of structural steel pipe structures used in construction, machinery, transportation, aviation, oil exploitation and other industries. Seamless steel pipe type outer diameter 10.0mm-168.3mm thickness in cold drawing In the production process of precision steel pipes, there are cold work hardening and hydrogen embrittlement, which are the main causes of cracking of cold drawn seamless steel pipe. This article analyzes two phenomena and proposes some measures to prevent cracking of cold-drawn small-diameter seamless steel tubes. Analysis of the bursting phenomenon The cold drawn seamless steel pipe is formed by shrinking the diameter of the precision steel pipe with a small diameter through a drawing die, and the process route is generally annealing, pickling, and drawing. In the process of drawing, the cold-drawn small-diameter seamless steel pipe sometimes has the same rapid cracking...

　　The large-diameter seamless steel pipe adopts unique technology. Its finished appearance looks high precision, and the quality of the inner and outer walls is smooth and the image is good. Generally, the preservation process of the factory is strictly controlled, not casually. A small warehouse can be completed. If the storage is not good, it will greatly reduce the selling phase, and it will also reduce the energy and effort that the manufacturer spends on it. Every step is going through an extremely delicate process. It can be done, and in general, they will be stored in a warehouse at a certain temperature. 　　With such a good storage, the sales of large-diameter seamless steel pipes are better, which is also the ingenuity that researchers have taken for him. It is finished by special treatment. After the product is formed, it can be delivered directly without deep processing, eliminating the tedious steps of deep processing again. Because of special treatment, there is no need ...