SSAW Pipe

Hot-rolled seamless steel pipe production is one of the important processes, the rational development of its process plan or not, a direct impact on the size of the steel pipe after rolling the surface of the precision and quality, Unreasonable process plan will cause the inner surface of the steel pipe to produce the defects such as folding, crack and concave. N80 steel casing is a standard oil casing commonly used in oil (for the seamless steel pipe), the standard provisions of the finished pipe heat treatment process for quenching and tempering. N80 casing production process is as follows: furnace refining → continuous casting → annular furnace → perforation → continuous rolling → stepping furnace → sizing → sawing → tempering treatment → straightening → physical and chemical testing → testing → thread processing → Coupling tight → water pressure test → measuring length weighing, marking → packaging storage. The billet was heated in an annular furnace for about 2.5 hou...

　　 LSAW steel pipe quality check methods, during which the physical approach is the most commonly used inspection methods, physical examination is the use of physical phenomena to determine or check the method. 　　 Magnetic force 　　Magnetic flaw detection can only find the appearance and appearance of magnetic straight seam welded pipe shortcomings, and the shortcomings can only do quantitative analysis, the nature and depth of the shortcomings can only be based on experience to estimate. Magnetic inspection is the use of magnetic field magnetization of ferromagnetic Longitudinal Welded Pipe leakage occurred to find the shortcomings. According to the measurement of magnetic flux leakage method is not the same, can be divided into magnetic powder method, magnetic induction method and magnetic recording method, during which the most widely used magnetic powder method. 　 　Soaked inspection 　　Penetration test is the use of some of the liquid permeability and other physical properti...

　　After a series of cold-rolled pipe has the following characteristics: 　　1, Through the organization of cold rolled grain fine pipe, pipe mechanical and physical properties compared with the superior; 　　2, Cold rolling mill for the correction capability of the original tube wall thickness deviation is large, precise geometry, low surface roughness; 　　3, Pass deformation larger, up to 70% -85%; 　　4, Cold-rolled production pipe can significantly reduce intermediate steps, such as heat treatment, pickling, beginning, straightening and cutting, to reduce the metal materials, fuel, electricity and other auxiliary materials and human consumption; 　　5, The method to produce cold-rolled thin wall and ultra-thin wall, inner and outer surfaces scratch-free quality pipe; 　　6, Be effectively rolled high-alloy, poor ductility various metal pipe. 　　 Check www.tjxysteel.com for more info

　　1. In the process of ssaw steel pipe forming, the steel plate is uniformly deformed, the residual stress is small, and the surface is free of scratches. The processed steel pipe has greater flexibility in the size range of steel pipe diameter and wall thickness, especially in the production of high steel grade thick-walled steel pipe, especially in large-caliber thick-walled pipe, which has other advantages unmatched by other processes and can be satisfied. Users have more requirements on steel pipe specifications; 　　2. The process of internal and external welding (precision welding) after pre-welding can be used to achieve welding. It is not easy to have defects such as misalignment, welding deviation and incomplete penetration, and it is easy to control the welding quality. 　　3, The overall mechanical expansion, can effectively improve the dimensional accuracy of the steel pipe, and improve the distribution of the internal stress of the steel pipe, so as to avoid damage due to ...

　　Ultrasonic detector gas leak detection system is different from the specific design of the sensor to sense that it is limited to a specific gas, but rather to detect sound. 　　Ultrasonic focusing on industrial leak detection, leak detection and predictive maintenance, products and solutions in steel and non-ferrous metals, tobacco and food and beverage, automotive, chemical and oil and gas, mining and cement, glass manufacturing, electricity and cleaning system, military, paper and printing, rail transport, water treatment, infrastructure, subway fan and large air conditioning systems, port automation, and many other industries are widely used. 　　Any gas leakage through holes will generate eddy currents, ultrasound will be part of the band, making the ultrasonic detector leak detection system capable of sensing any kind of gas leak. Drawing process of precision seamless tube with a detection system scan, you can hear the sound from the headphones leak or see changes in the digital...

　　According to the manufacturer's technical requirements, ASTM A213 P11 alloy steel pipe has several methods to measure the length.Next I will introduce four main methods of measuring steel pipe length. 　　1, Grating Length Measurement 　　The basic principle is that two fixed-length grating scales are respectively arranged on the two outer ends of the steel pipe, and the grating rod is driven by the rodless cylinder to be close to the two ends of the steel pipe to measure the length of the A213 P11 alloy steel pipe by using light interference phenomenon. 　　Characterized by high accuracy. However, grating scales are expensive and difficult to maintain, and are sensitive to the effects of dust and site vibrations. 　　2, The Camera Measured Length. 　　Camera length measurement is the use of image processing to achieve A213 P11 alloy steel pipe length measurement, the principle is in a section of steel pipe roller conveyor to install a series of equidistant photoelectric switch, ...

　　SSAW steel pipe refers to spiral welded steel pipe with steel coil as raw material, which is extruded and formed at normal temperature and welded by automatic double wire and double submerged arc welding process.Classification of SSAW steel pipe includes: 　　1. SSAW steel pipe (SY5036-83) used for pressurized fluid transportation is mainly used for conveying oil and natural gas pipeline. 　　2. SSAW steel pipe (SY5038-83) used for pressurized fluid transportation, it is welded with high-frequency welding method. The loading capacity of it is powerful, the plastic is good, and it is easy to weld and machine shaping. 　　3. SSAW steel pipe (SY5037-83) used for general low-pressure fluid transmission, it is welded with double-sided automatic submerged arc welding method or one-side welding method, it is mainly used for water, gas, air and steam and other general low-pressure fluid delivery. 　　Now general standards for SSAW steel pipe is generally divided into: SY/T5037-2000 (minister...

　　Requirements of galvanized insulated steel pipe in construction: 　　1, Galvanized insulated steel pipe is used for gas and natural gas, long-distance transmission of high pressure pipeline. 　　2. Galvanizing in order to preserve corrosion, in the long-distance transportation, the pole protection testing station is generally set up at several tens of kilometers to 100 kilometers. The instrument in the station generates cathode electrons to fill the pipeline, and the galvanized surface is conducive to conductive rust. The pipe is charged uniformly. 　　3, In order to prevent the loss of cathode electrons in the pipeline, the galvanized pipe is filled with electric tannin (mixture of bitumen and quartz powder) and kraft paper, second oil two paper or three oil three papers before installation. After head welding, it should be treated equally. The insulation resistance should be not less than 0.5 Mn, and check if the pipe is punctured with low voltage 380V/220V. 　　4. On the side of t...

　　There are various steel pipes from seamless steel pipe to stainless steel pipe which can be used for transmission mission. What’s the difference for those pipes? How could we choose them for the engineering work? Today we would have a look at the different categories for water supply steel pipe and drainage pipelines. 　　Taking building water supply as an example, we will discuss it specifically. 　　First of all, the building water supply system would be classified with several types. They are living water supply system, production water supply system and fire water supply system. Different application would adopt different steel pipes. 　　Then, talking about building drainage system. It is another situation we should think about. Due to the nature of the sewage discharged from the system, domestic sewage, industrial waste water and roofing would be main types of sewage. Under this situation, two or more types of combinations in a pipeline are called combined flow systems 　　Acco...

　　Seamless stainless steel pipes are the preferred choice for high-temperature applications across industries due to their several superior properties. They possess greater strength under loading, exhibit exceptional corrosion resistance, can withstand shocks and vibrations, and offer reliable performance even under the toughest and harsh conditions. Due to these benefits, seamless stainless steel tubes and pipes are used in heating-pipelines, containers, coal-saving devices, super-heaters and repeaters, high press boiler, heat exchanger and condenser tubes, mechanical and structural tubing, among several others. 　　Grades of Stainless Steel Used in Producing Seamless Tubes and Pipes 　　Steel tubes and pipes used for the high-temperature applications must be of superior quality to resist high temperatures ranging from 400 degree Celsius to 1100 degree Celsius. For this reason, manufacturers use the following grades of stainless steel to fabricate seamless tubes and pipes. 　　304/304...

　　The delivery conditions of seamless steel pipe is the state of the final plastic deformation or final heat treatment of the delivered product. The hot-rolled or cold drawn (rolled) state or manufacturing state generally delivered without heat treatment; the heat-treated state after heat treatment delivery, or the normalizing, tempering, solid solution, annealing according to the type of heat treatment status. 　　The state of delivery of the seamless steel tube is usually the state of annealing or the original state of the steel, which facilitates subsequent processing. When ordering, the delivery status must be stated in the contract. Weight delivery status: 　　Actual weight - at the time of delivery, the weight of its product is delivered according to the weighing (weighing) weight; 　　Theoretical weight - The weight of the product at the time of delivery is based on the nominal weight of the steel. 　　 http://www.xysteelpipe.com/info/Condition-of-Delivery-for-Seamless-Steel-Pip...

　　According to ssaw steel pipe corrosion mechanism, and it has so far proposed a variety of protective measures, such protective measures basically be divided into the following types: 　　1, For the environment among the harmful substances from outside to inside gradually invasive characteristics, including permeability to adopt a series of technical control template, water spray material, impermeable layers, polymer modified mortar and the like. 　　2, For the nature of the electrochemical corrosion of steel, steel to eliminate the use of chemical principles of fundamental electrochemical corrosion. This type of measure such as cathodic protection, electrochemical desalination (again simplified) and technology can improve the rust inhibitor of steel corrosion resistance. 　　3, The use of hard or corrosion resistant material wrapped or coated on the surface of steel, such as layers of reinforced epoxy, steel and other stainless steel cladding. 　　4, The use of low water conservatio...

　　 SSAW steel pipe is a strip coil as raw material, after extrusion at room temperature, with automatic double wire-sided submerged arc welding process welded spiral seam steel pipe. 　　SSAW steel pipe process performance are as follows: 　　1. Bending performance. Prescribed by apex diameter bend 180 degrees, reinforced by the curved parts of the surface can not crack. 　　2. Reverse bending performance. According to the requirements, it can be reinforced reverse bending performance test. Reverse bending test bending test apex diameter than the corresponding increase in a bar diameter. First bend forward 45 degrees, after the reverse bend 23 degrees, 23 degrees after the reverse bending. After the reverse bending test, reinforced by the curved parts of the surface can not crack. 　　3. The surface quality. Steel surface allowed to have cracks, scarring and folding. Reinforced surface allows the bump, but shall not exceed the height of the transverse ribs, on the other steel surface ...

　　API 5L steel pipe would be applied among the areas of fluid transportation steel pipe-preferred in long pipelines due to inexpensiveness, oil and gas. No matter which kind of industry needs it, we should make different test for seamless or ERW steel pipe before the purchase. 　　Here is the main types of the test for API 5L line pipe: 　　Hydrostatic test: This test would give guarantee for leakage problem from testing the weld seam or the pipe body. Jointers need not be hydrostatic tested provide the pipe sections used were successfully tested. 　　Bend test: No cracks shall occur in any portion of the test piece and no opening of the weld shall occur. 　　Flattening test: Acceptance criteria for flattening test shall be: 　　EW pipes D<12.750 in: 　　X60 with T 500in. There shall be no opening of the weld before the distance between the plates is less than 66% of the original outside diameter. For all grades and wall, 50%. 　　For pipe with a D/t > 10, there shall be no openi...

　　Precision seamless steel tube is a kind of high precision steel tube material after quenching or cold rolling.Because of no oxide layer of the surface, precision seamless steel pipe has the advantages of high-pressure, high-precision, high-grade finish, which can be used to manufacture cylinders and welded pipes. 　　Compared to other solid steel material, seamless steel pipe is lighter with the same flexural torsional strength. It is an economic section of steel, widely used in the manufacture of structural and mechanical parts. Precision seamless steel pipe also has some of their own characteristics. They have been widely used to manufacture ring parts, can improve the utilization of materials, simplify the manufacturing process, save materials and processing time, such as rolling bearing rings, jack sets. 　　Generally, the industry require a higher precision, they often use precision seamless steel pipe, others mainly use seamless steel pipe if there is no precision requirements....

　　Casing and tubing core manufacturing technology are following below: 　 　1, The chemical elements 　　Due to the harsh environment service, coiled tubing mechanical properties and corrosion resistance have high requirements, to optimize the design of the chemical composition of the material, it must also implement clean control the whole process of smelting, rolling, etc., to minimize inclusions and S, P and other harmful elements. 　 　2, Processing 　　Since dislocation multiplication after other causes hardening and Bauschinger effect together, transform law tubular body strength to control. 　　 3, Heat treatment 　　By tube heat treatment to achieve optimum control of microstructure and properties, especially high strength and high ductility and low residual stress. 　 　4, Welding Technology 　　Low carbon and low alloy steel, currently used mainly HFW welding technology, need to study the optimum welding parameters (such as current, voltage, frequency, welding speed, forming ...