Seamless Steel Pipe

Project location：Qatar Product：LSAW Welded Steel Pipe Standard and material：ASTM A53 GrB Specifications：660*9.53*12000mm 813*9.53*12000mm 660*9.53*6000mm 813*9.53*6000mm Usage: Construction project Inquiry time：2022.08.06 Order time：2022.08.15 Shipping time：2022.10.26 Arrival time：2022.12.08 This order is the project of the Qatar customer. The customer purchased a batch of steel pipes in stock from our company in June this year, which was highly praised by the customer after arrival. Both quality and service were affirmed and recognized. All the efforts are a kind of precipitation. There is no shortcut. Only by being steady and down-to-earth, can Xinyue brand develop in the long run. With good cooperation in the early stage, our company received the inquiry from this Qatari customer in early August. After knowing the project details, Xinyue quickly submitted the project plan. After friendly negotiation, both parties signed the project contract in the middle of August. The product is LS...

Project Location: Senegal Product：LSAW Steel Pipe Specification：1220*12mm and 1220*22mm length 8m Standard and steel grade：EN10219 S355K2 Usage: Structural Inquiry time：March 2022 Sign date：April 2022 ETD：May 2022 ETA：July 2022 Because this customer has cooperated with our company(XINYUE STEEL GROUP) for 4 times during last 2 years. In the previous several times of cooperation, our customers are very happy for our quality and after-sales service. These cooperation laid a solid foundation for this cooperation. In addition, the current international situation highlights China’s advantages: China’s price is relatively stable, the delivery date is controllable due to its rich experience in epidemic control, and the international economy is relatively stable. So the customer chooses us to cooperate with xinyue again. The cooperation reached this time, in addition to the SINYUE brand reputation of good faith management, there is a very important point: Which is the attitude and diligence of ...

　　"ERW steel pipe" is a straight seam electric resistance welded pipe. English Electric Resistance Welding, abbreviated as ERW, is used to transport vapor and liquid objects such as oil and natural gas. It can meet various requirements of high and low pressure, and currently accounts for the world in the field of transportation pipes. A pivotal position. 　　1. The welded pipe is made of steel plate welded by high-frequency electric resistance welded pipe (ERW steel pipe), straight seam electric welded pipe (LSAW steel pipe), spiral welded pipe (SSAW steel pipe). In electrical engineering, it is indicated by "SC". It can be used as a water gas pipe or a threading pipe, which is relatively thick. 　　2. the line pipe is also the wire tube, relatively thin, with the "T", can only be used for threading. 　　3. The ERW tube is a “high-frequency resistance welded steel pipe”. It is different from the ordinary welded pipe welding process. The weld is made of the...

　　Molding method for manufacturing large diameter lsaw steel pipe are UOE molding method, a row of roll forming method (CFE), CE molding. For the vast majority of the final steps of the molding process is to conduct a post-weld tube expanding full-length, in order to improve the quality of welded steel pipe shape. Expanding become large-caliber Longitudinal production to ensure the quality of the finished tube an important process. 　　Expanding is a use of hydraulic or mechanical means from urging the steel pipe along the pipe wall bulged radially outward pressure molding process. Mechanical than hydraulic mode, the device is simple and more efficient, the world's most advanced large-caliber Longitudinal several enlarged diameter pipeline system processes are adopted, the process is as follows: Mechanical expanding the use of the split-side portion of the enlarged diameter of the segments radially expand, so the tube along the longitudinal direction in a stepwise manner to achiev...

　　 LSAW steel pipe weld appearance basic requirements: 　　Straight seam steel pipe before NDT, weld visual inspection should meet the requirements. General requirements for straight seam steel pipe weld appearance and surface quality of welded joints are as follows: Welding should look good shape, width of each side groove edge 2mm overshadowed appropriate. Fillet weld leg height should meet the design requirements, the shape should be smooth transition. 　　Welded joint surface requirements: 　　(1) Does not allow cracks, lack of fusion, pores, slag, spatter exist. 　　(2) The design temperature is below -29 degrees pipes, stainless steel and hardened alloy steel pipes tend to be larger weld surface, without undercut. Other material pipe weld undercut depth should be greater than 0.5mm, continuous undercut length should not exceed 100mm, and both sides of the weld undercut always grow up to 10 percent of the entire length of the weld. 　　(3) Shall not be lower than the surface of t...

　　Large diameter LSAW steel pipe with its big wall thickness, good material, stable processing technology, becomes the preferred pipe by largest domestic and foreign oil and gas transportation project. In the large diameter LSAW steel pipe welded joints, weld and heat affected zone are the most prone to produce a variety of defects, and welding undercut, pores, slag, not fused, not penetration, welding cracks are the main form of welding defects, and also are the origins those often make LSAW steel pipe produce quality accident. The quality control measures will be listed below, if you you are interested in the production process of LSAW steel pipe, you can click the hyper-link. 　　1.The quality control before welding: 　　1) First of all, pipe manufacturer should take control of the quality of raw materials, after passing the inspection, raw materials can formally enter the construction site. And pipe manufacturer resolutely put an end to the use of substandard steel. 　　2) The nex...

　　Large diameter LSAW steel pipe, also known as welded 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. 　　General pipe (manufactured by Prime 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, th...

　　This year, the effectiveness of China's steel industry achieved a comprehensive upgrade, what is the main reason? Prime Steel Pipe as the leading manufacturer and exporter of carbon steel pipe , including ERW steel pipe, LSAW steel pipe, SSAW steel pipe, seamless steel pipe, etc., we think the main reason are: 　 　1. Domestic economy remain stable 　　First of all, the national economy remain stable, real estate, infrastructure, automotive and other related industries demand, become the biggest driving force of the steel industry. GDP growth 6.9% in the first half of 2017, for eight consecutive quarters to maintain the range of 6.7% -6.9%, of which real estate and infrastructure investment growth has rebounded. 　　 2. Effective supply structural reform 　　Second, the supply structural reform and DE-capacity promotion effective changed the phenomenon of excess capacity. According to the data report, five years target of excess capacity of China's iron and steel industry is ...

　　LSAW (Longitudinal double submerge arc welding) carbon steel pipe is a type of SAW pipe made of steel plates that were hot rolled by JCOE or UOE forming technology. JCOE technology represents the shaping and forming processes involved during manufacturing as well as the inner and outer welding and cold expansion carried out after welding. 　　The LSAW large diameter steel pipe manufacturing process is explained in the steps below: 　　1. Plate Probe: This is used for manufacturing the large diameter LSAW joints right after it enters the production line which is the initial full-board ultrasonic testing. 　　2. Milling: The machine used for milling does this operation through two-edged milling plate to meet the requirements of the plate width and the sides parallel to the shape and degree. 　　3. Pre-curved side: This side is achieved by using a pre-bending machine on the pre-bending plate edge. The plate edge needs to meet curvature requirement. 　　4. Forming: After the pre-bending ...

　　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...

　　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...

　　In the cross-section of the lsaw steel pipe , there is a phenomenon that the outer diameter is not equal, that is, there is a maximum outer diameter and a minimum outer diameter which are not necessarily mutually perpendicular, and the difference between the maximum outer diameter and the minimum outer diameter is ellipticity (or not Roundness). In order to control the ellipticity, some lsaw steel pipe standards specify the allowable index of ellipticity, which is generally specified as not to exceed 80% of the outer diameter tolerance (executed after consultation by the supply and demand sides). 　　LSAW steel pipe is curved in the length direction, and its curve degree is called curvature. The bending degree specified in the standard is generally divided into the following two types: Partial bending: Using a one-meter-long straight ruler at the maximum bending of the steel pipe, measure the chord height (mm), which is the value of the local bending degree. Its unit is Mm/m indicate...

　　Features of LSAW steel pipe on technical： 　　1.Pipe forming process, the steel sheet uniform deformation, small residual stress, surface does not produce scratches, processing of steel in the diameter and wall thickness of pipe sizes range, greater flexibility, especially in the production of high-grade steel thick-walled pipe, particularly large diameter thick-walled tube aspect has the incomparable advantage of other processes to meet more user requirements in terms of pipe specifications; 　　2.The use of internal and external welding (fine welding) process after the first pre-welding, can be implemented in the best position welding, less prone to the wrong side, partial and incomplete penetration welding defects, easy to control weld quality; 　　3.Overall mechanical expanding, effectively improve the dimensional accuracy of steel, improved the distribution of internal stress of the steel pipe, to avoid damage due to stress caused by corrosion, it is also conductive to the cons...

　　 LSAW steel pipe quality check methods: magnetic force, soaked inspection, ray detection, ultrasonic flaw detection 　　 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 properties to discover and show shortcomings, including the color check and fluorescence detection of...

　　Double-sided Submerged Arc Welding (LSAW - Longitudinal Submerged Arc Welded), a new kind of welding method, was invented in 1940. Compared with the manual welding, the same point is that LSAW is using slag protection technology, but the slag is not the coating of electrode. The welding flux is made of by the slag specially smelting. This system of welding flux composed of a funnel transfer to the front of the welding through a pipeline. 　　The second difference is that the electrode was not used while adopts the welding wire because welding wire can be provided continuously. After having burned a electrode, we must throw a welding head, and we have to stop the operation, moreover, the operation continues by changing electrode to weld once again. 　　The first advantage of using this method is that it is fully automated. The second advantage is that the heat transfer and protection performance are stronger and the welding quality is higher under the submerged arc welding. The third ...

　　JCOE lsaw steel pipe manufacturing process is a new type of welded steel pipe forming technology that was developed in the 1990s. The main forming process of this technology is to mill the edge (or planing edge) of the steel plate before the steel plate width direction. Pre-bending, and then step-by-step molding in the order of J letter type → C letter type → O letter type, and multiple times of pressure stamping in the forming process, the three-point bending mold is used as the basic principle. 　　Since the raw material steel plate of lsaw steel pipe is formed by multiple progressive die pressing, it is necessary to solve the following basic problems: 　　1. How to determine the shape of the die, the stroke of the upper die and the spacing of the lower die 　　2. How many punches are required to ensure the most suitable punching Bending radii and optimal open O-tube. These problems are different from the steel plate material, the specific mechanical properties of the steel plate p...

　　After the double-sided submerged arc welded pipe(dsaw pipe) is rusted, the surface of the steel is mainly polished by using a wire brush or the like, and the cleaning and preheating of the spiral pipe can remove the loose or raised scale, rust, welding slag and the like. The descaling of manual tools can reach Sa2 level, and the rust removal of power tools can reach Sa3 level. If the surface of the lsaw steel pipe is attached with strong iron oxide scale, the rust removal effect of the tool is not ideal, and the anchor depth required for anti-corrosion construction cannot be achieved. 　　On the basis of the traditional application, a new application has been added, which makes the use of the lsaw steel pipe more abundant, and at the same time reduces the use cost of the lsaw steel pipe. The radio frequency sensor provides 200 volts, 50 amps of smooth flow through the lsaw steel tube, and the experimental sample is heated by induction. The lsaw tube itself does not get hot, but the e...

　　Thick-walled lsaw steel pipe anti-rust oil to be disposed of, we must first understand the characteristics and varieties of anti-rust oil, as well as their results. So this time in the procurement of goods can not be thrown off balance, direct save time. Below let us Xiaobian to introduce walled Longitudinal creosote strengths and varieties of it. 　 　1. Quick-drying 　　Its biggest advantage of doing that is fast, rugged, use widely anticipated, it is possible to use in harsh environments, the use. 　 　2. Soft membrane 　　With paraffin oil or heavy oil disposal made, rust-proof function are the three strongest presence, and can be washed using one kind of solvent. 　　3. Film type 　　Its anti-rust function relatively handicap. But its operation is very simple disposal. Use can reduce the harm caused by their conflict, reduce costs, ensure productivity directly carried out.

    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 som...

    Steel pipe is widely used for infrastructural construction in our daily life.     Square hollow section is widely used in housing and building.     Rectangular steel pipe is widely used for port construction.     ERW steel pipe is widely used every where, from housing, to bridge support, to port construction, and ERW is the most economic steel pipe for general construction.     SSAW steel pipe is widely used for offshore construction and heavy support construction.     LSAW steel pipe is widely used for infrastructural delivery construction.     SMLS steel pipe is widely used for high pressure and high temperature delivery construction.     Scaffolding is a temporary structure used to support people and material in the construction or repair of buildings and other large structures. Material Storage Racks, Pallets, Hydraulic Platforms, Trusses, Columns, Purlins, Greenhouse, Stands Towers, Ag...