LSAW Steel Pipe

Carbon structural steel pipe is a seamless pipe that does not contain other alloying elements except for carbon (C) elements and a certain amount of silicon (Si) (generally not exceeding 0.40%) and manganese (Mn) alloying elements for deoxidation. . Such steels must guarantee both chemical composition and mechanical properties. The content of impurity elements such as sulfur (S) and phosphorus (P) is generally controlled below 0.035%. Structural seamless pipe pickling In addition to stripping the iron oxide scale during pickling, hydrogen also diffuses into the carbon structural steel pipe matrix and gathers at impurities or pores. It leads to an increase in internal stress, reduces the plasticity of carbon structural steel pipes, and increases the brittleness of carbon structural steel pipes. This effect is called hydrogen embrittlement. Hydrogen embrittlement is mainly affected by the diffusion rate of hydrogen atoms. The diffusion rate of hydrogen is related to the following factors...

 Project location：South Africa Product：Seamless Steel Pipe(screwed and socket) Specifications：42.2*4.85*6000MM Standard and material：ASTM A106 GRB Usage：water transfer in Mining project Received the inquiry in Nov. 2022 Signed the contract in Dec. 2022 Estimated Shipping time: Early Jan., 2023 Arrival time：Early Mar., 2023 The mutual reliance of China and Africa as important “stakeholders” is significant for safeguarding the interests of both sides and other developing countries, expanding and promoting the democratization of international relations, and providing a broader export market for Africa as a result of China’s development. In August 2018, we received an active inquiry from the customer for the first time through the influence of Xinyue in other local cooperation projects, and after more than a month of business communication and multifaceted negotiation and communication, product expansion introduction display, etc., within 2 months, we smoothly signed a cooperation orde...

At the end of October 2021, after a month of negotiations, a new European customer gave Xinyue full trust and support, and ordered nearly 800 tons of seamless pipes to Xinyue. The product is EN10216-1 standard, there are 20 specifications in total, and the caliber ranges from 21.3mm to 323mm. Taking into account the client’s project site and the end of the year, the new year is approaching. Due to the government’s winter electricity environmental protection system and the Winter Olympics, large-scale steel production may be stopped early in early January and enter a holiday state. Taking into account the impact of such factors on delivery, Xinyue responded quickly and prioritized production, completed all production within 30 days, and quickly locked the ship and successfully secured a position in early November. After TPI's strict size and physical and chemical inspections, it was finally shipped to Tianjin Port in early December. 2021 is about to pass. Thanks to all customers for...

 Seamless pipes are made of steel ingots or solid pipe blanks through perforation into capillary pipes, which are then hot-rolled, cold-rolled or cold-drawn. It occupies an important position in my country's steel pipe industry. So what should be paid attention to when producing seamless pipes? 1) Pay attention to whether the thickness of the embryo pipe wall is uniform. If it is found that the wall thickness of the embryo pipe is uneven, the surface polishing treatment must be carried out. In addition, pay attention to whether the inside and outside of the embryo tube are flat and there are no bumps and defects. Once the bumps or defects are found, they should be dealt with in time. 2) The re-inspection of the embryo pipe. The main work of the re-inspection is to ensure that there are no cracks and defects on the outside of the capillary pipe, check these problems in the capillary pipe and make corresponding elimination instructions, and be sure to remove the pockmarked surface an...

 Seamless pipe refers to a steel ingot or solid pipe blank that is perforated into a capillary pipe, and then hot-rolled, cold-rolled or cold-drawn. Compared with solid steel such as round steel, the steel pipe is lighter in weight when the bending and torsional strength is the same, and is an economical section steel. So what are the characteristics of its production and processing process? 1) Dimensional stability: for high-precision seamless pipes, the required precision is high, so the stability of seamless pipes sizes must be maintained. Due to the slow cooling speed of straightening in the air, it has a stabilizing effect on austenite, which will increase the number of retained austenite seamless pipes in the structure, so cold treatment must be performed; 2) Reduce quenching deformation: because the seamless pipe is slender, it is easy to deform during the quenching process, and its deformation must be strictly controlled. Heat treatment is a very critical process. In the pr...

 　　In December of 2020, Xinyue received an inquiry for the bidding of seamless pipe project from Algeria, Africa. This was a newly developed customer. In order to had better understanding about the project situation,our sales engineer conducted detailed negotiation and communication with client. Combined with the specific needs of the project, we customized a service plan and a reasonable quotation for the customer, and cooperated with the customer to prepare the technical documents and technical reports required by the bidding. The meticulous and thoughtful service of whole process left a deep impression on the customer. Finally, in April 2021, the customer successfully won the project order and shared the good news with Xinyue at first time. 　　The pipes used in this batch of projects were more than 500 tons of seamless pipes with the same outer diameter and wall thickness, but the length requirements were different, and the pipe ends need to be connected with male and female thre...

    In recent years, in order to reduce the billet's cost, vigorously developing oxygen converter steel and continuous casting billet to produce billet can reduce the cost of about 15%. The quality of the billet is influenced by the quality of seamless pipe for structure: Is the primary factor in determining the quality of seamless pipes. Cold drawn seamless pipe believes that in order to ensure the reasonable progress of the perforation process and obtain high-quality seamless pipes, strict requirements must be imposed on the geometric dimensions, low magnification structure and surface state of the tube blank     If the diameter of the tube blank is too large or the ellipse is too large, the bite conditions during perforation will be deteriorated, and the inward folding will be caused due to the excessive compression of the tube blank diameter.     Internal organization refers to shrinkage and central porosity, accumulation of non-metallic inclusions...

    High pressure boiler seamless steel tube is a kind of boiler tube, which belongs to the seamless steel tube category. The manufacturing method is the same as the seamless pipe, but there are strict requirements on the steel type used for manufacturing the steel pipe.     High-pressure boiler seamless steel tubes are often under high temperature and pressure when used. The tubes will be oxidized and corroded under the action of high temperature flue gas and water vapor. It is required that the steel pipe has high durability, high resistance to oxidation and corrosion, and good structural stability. High-pressure boiler seamless tubes are mainly used to manufacture superheater tubes, reheater tubes, air ducts, and main steam tubes for high-pressure and ultra-high-pressure boilers.     Low and medium pressure boiler tubes GB3087-2008, seamless steel tubes for high pressure boilers GB5310-1995 are used to manufacture low temperature and high pressure bo...

　　Cold drawn erw steel pipe, which is one of the best choices for the production of multi-stage hydraulic cylinders. Its process is the same as that of precision seamless pipe cold drawing. It is precision drawn by precision resistance welding (ERW) and manufactured with EN. 10305-2 EU mechanical cold drawn carbon steel welded pipe standard. 　　After the electric resistance welded pipe is welded, the whole pipe body is normalized to ensure the homogeneity of the weld and the heat affected zone with the rest of the metallographic structure and mechanical properties; cold drawing and subsequent heat treatment (eliminating internal stress) and the steel pipe have good dimensions. And mechanical properties. 　　After the welded steel pipe is processed by cold drawing and deep processing, a high-quality steel pipe with small dimensional tolerance and good mechanical properties is obtained. 　　In addition, cold drawn welded pipes have significant advantages over cold drawn seamless pipes i...

　　Difference between hot stretch reducing pipe and LSAW steel pipe are basically has the following two points: 　　1, Resulting in differnce on product quality due to the different processes, hot stretch reducing also carried out a process after high-frequency welding process that lsaw steel pipe can not found ------ Longitudinal are no clear line inside and outside burrs. Burr presence will affect the tube fluid - flow, burr block the normal flow of fluid, resulting in a whirlpool. According to principles of fluid mechanics, welding must increase local compression, discontinuity make pipe safety factor is also greatly reduced, hot stretch reducing steel production process - fully taken into account the existence of the risk of burrs, to limit burr removal, making it uniform thickness, no difference in the appearance and seamless. So from this point of view, hot stretch reducing pipe joints also completed the transition seamless. 　　2, Weld quality directly determines the quality of ...

　　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...

　　ASTM A179 cold drawn seamless carbon steel pipe is mainly used in various sectors of the metal structure facilities, mainly after the rust of steel pieces immersed in 440 ~ 460 ℃ melting zinc solution, so that the steel surface attached to the zinc layer, which play a preservative purpose. This is an effective way of metal corrosion, the use of the main features are the following: 　　1. ASTM A179 cold drawn seamless pipe manufacturers with thick dense dense zinc layer covered in the cold drawn seamless tube surface, it can avoid cold drawn seamless tube matrix and any contact with the corrosion solution to protect the steel matrix from corrosion. In the general atmosphere, the surface of the zinc layer to form a layer of thin and dense zinc oxide surface, it is difficult to dissolve in water, so the steel matrix plays a protective role. If zinc oxide and other components of the atmosphere produce insoluble zinc salt, the anti-corrosion effect is more desirable. 　　2. With iron - z...

　　ASTM A106 Grade B covers pipe sizes in NPS (National Standard Straight) from 1/8 inch to 48 inch (10.3mm DN6 – 1219mm DN1200), meanwhile complied the nominal wall thickness of the standard ASME B 36.10M. For other sizes out of the ASME B 36.10M is also allowed to use this standard specification. 　　Standards referred for making ASTM A106 Grade B seamless pipe . References ASTM standards: 　　a. ASTM A530/ A530M This is the standard specification for the common requirements of the carbon, and alloy pipes. 　　b. E213 The standard for the Ultrasonic Examination test 　　c. E309 The standard for the Eddy Current examination test 　　d. E381 The standard for the plan of Macroetch test, for the steel products the steel bars, steel billets, blooms, and forging steels. 　　e. E570 The standard for the test plan for the flux leakage test of the ferromagnetic steel pipe and pipeline products. 　　f. Related ASME Standard: 　　g. ASME B 36.10M The nominal sizes standard specification for the ...

　　Frequency straight seam resistance welded steel pipe is hot-rolled coil after molding machine, the use of high-frequency current skin effect and proximity effect, so that the edge of the tube is heated to melt under pressure welding to achieve the effect of squeezing rollers produced. 　　Straight seam electric resistance welded pipe and seamless pipe has the following advantages: 　　A) high dimensional accuracy. Than the diameter welded steel pipe and seamless steel pipe wall thickness variation is much smaller, because the steel rolling and pipe forming easy to control, so the high dimensional accuracy. 　　B) good mechanical properties. Since the pipe is easy to control with the strip rolling line with the development of welding technology and heat treatment technology, the weld properties can be controlled, so straight seam electric resistance welded steel pipe elongation of 8% -10% higher than seamless steel tubes, which because straight seam welded carbon overcast about 12% l...

　　The effect of roller adjustment on the quality of ERW has a process called roller adjustment when producing ERW pipes. During the production process, the roller is damaged or worn seriously. It is necessary to replace the unit on the part of the roller, or to produce a certain number of rollers continuously to meet the needs of the replacement of the whole roller. At this point, the roller should be adjusted to achieve excellent steel quality. If the roll adjustment is not good, it is easy to form the change of steel pipe seam, lap welding, edge wave, indentation or scratch on the surface of drum and pipe body, elliptical steel pipe and so on. Therefore, the roll adjustment prompt should be mastered when the roll is replaced. 　　1, replacing the standard steel pipe is usually the whole volume that needs to be replaced. The way of roller conditioning is to draw a baseline from the inlet to the outlet by adjusting the wire, so that each hole is located on the baseline and the molding ...

    Metallographic analysis of the seamless tube includes high magnification test and low magnification test.     High magnification test     A high magnification test is a method of evaluating the internal structure and defects of a material through a microscope. The high-power test items that are usually performed on seamless tubes include: microscopic evaluation of non-metallic inclusions in steel; determination of average grain size; determination of decarburized layer depth; microstructure inspection.     Seamless tubes Currently, the assessment of non-metallic inclusions in steel is generally performed at a magnification of 100 times the field of view. The seamless steel tube compares the most serious field of inclusions in the sample with the standard level map to evaluate inclusions in the steel. The level of things.     Non-metallic inclusions are graded according to the A method in GBIP 10561, which can be classified as...

    Carbon seamless steel pipe is mainly used for conveying high-pressure oil and gas near the wellhead. With the increasingly serious problem of hydrogen sulfide corrosion, the development of anti-sulfur seamless pipeline is imminent, and the performance of sulfur-resistant is the key. The influence of Cu and Ni on the HIC properties of the seamless pipe materials and the S content in the steel were also investigated. The effects of Cu and Ni addition on the properties of the HIC were also investigated. Hydrogen bubbling sensitivity.     1. Test method     According to the ISO3183 standard, the ingot method was used to smelt 7t 1 t ingot in the laboratory. After forging, perforation, pipe jacking and sheet reduction, the pipe was cut to 20 mm × 100 mm × 5 mm , And then immersed in the solution prepared according to the standard. After 96 h, the specimens were taken out and taken perpendicular to the cross-section. Three parameters (crack length ratio C...