ERW Steel Pipe

 The hot metal pre-desiliconization technology was developed based on the hot metal pre-dephosphorization technology. Since the affinity of oxygen and silicon in molten iron is larger than that of phosphorus, when deoxidizing by adding oxidant, silicon is preferentially oxidized than phosphorus, and the formed SiO2 greatly reduces the alkalinity of the slag. For this purpose, the silicon content must be reduced to less than 0.15% before dephosphorization. This value is much lower than the silicon content of the blast furnace molten iron. That is to say, only when the silicon in the molten iron is mostly oxidized, the phosphorus can be rapidly oxidized and removed. Therefore, it is necessary to remove silicon before dephosphorization. http://www.tjxysteel.com/news/remove-silicon-before-dephosphorization-518.html

 Most of the structural seamless steel pipes work under relatively large dynamic loads. They are subjected to tension, compression, bending, torsion or shearing. Some surfaces also have friction, requiring certain wear resistance and so on. In summary, parts operate under various compound stresses. Structural seamless steel pipes are mainly structural parts of various machines and mechanisms, such as shafts, connecting rods, studs, gears, etc., and are widely used in the manufacturing industries such as machine tools, automobiles and tractors. Especially for large parts in heavy machinery manufacturing, quenching and tempering treatment is used more. Therefore, the quenching and tempering treatment of structural seamless steel pipes occupies a very important position in heat treatment. The quenched and tempered parts in mechanical products have different performance requirements because of their different stress conditions. Generally speaking, all kinds of quenched and tempered par...

 What is the converter type, and what are the basis for selecting the converter type? The converter type refers to the geometry of the inner shape of the converter after bricklaying. The following factors should be considered when selecting a converter furnace type: (1) It is beneficial to the physical and chemical reaction of the steelmaking process; it is beneficial to the movement of the furnace liquid and the furnace gas; it is beneficial to the uniform stirring of the molten pool. (2) Splash should be small and metal consumption should be less. (3) The furnace shell is easy to be processed and manufactured; the furnace lining brick is easy to be built; the maintenance is convenient, and the furnace lining has a long service life. (4) It is beneficial to improve working conditions and increase the operating rate of the converter. http://www.tjxysteel.com/news/converter-type-519.html

 The role of converter slag in steel making: (1) removal of P and S in molten metal; (2) reduction of erosion of refractory materials; (3) creation of favorable conditions for decarburization of dispersed metal droplets; (4) Prevent a large amount of heat loss, prevent the oxygen flow from strongly impacting the molten pool; reduce metal splashing; (5) prevent the molten steel from absorbing harmful gases; (6) adsorb foreign and intrinsic fine non-metallic inclusions. http://www.tjxysteel.com/news/role-of-converter-slag-in-the-steel-making-process-521.html

 Based on the skin effect, proximity effect, eddy current thermal effect and electromagnetic induction principle of electric charge, the high-frequency welded pipe (ERW pipe) heats the part of the steel at the edge of the weld to a molten state, and achieves the purpose of welding through the extrusion of the inter-crystal bonding. Do you know what are the factors that affect its quality? 1. Weld gap control The strip is conveyed to the welded pipe unit, where it is gradually rolled into round billets with open gaps by rolling with multiple rolls. Adjust the compression of the squeeze roller, and control the gap between the welds to be 1-3mm, so that the welds are flush. If the gap is too large, the proximity effect is reduced, the eddy current is insufficient, and the intercrystalline joint of the weld is poor, fusion or cracks may not occur. If the gap is too small, the proximity effect will be increased. If the welding heat is too large, the welding seam will burn and affect the...

 Seamless steel pipe installation and precautions: A. Construction preparation (1) Operating conditions The ground of the pipeline trench is completed; the bricklaying of the pipeline well is completed. (2) Material requirements Various specifications and models of pipes are complete. (3) Main equipment Cutting machine, electric welding machine, polishing machine, electric hammer, etc. B. Quality requirements The allowable deviation of the vertically installed riser is 3mm per meter, and the allowable deviation above 5m is not more than 8mm. Horizontally installed pipes are allowed a deviation of 1mm per meter. C. Pipeline installation 1. Pipe support production and installation: Design according to drawings, carry out pipeline positioning, and prefabricate pipeline supports according to site conditions. Hang the wire down from the 25th floor, and then fasten the bracket. 2. Pipeline installation: The material is cut according to the design and on-site, and then the groove is made ...

 Xinyue has visited our customers in Vietnam, Malaysia, South Korea and other southeast Asian countries this year. In November 2018, it is a great pleasure that Mr. Ton who come from Singapore visited our company, this is the second time to meet Mr. Don, we meet each other for the first time at the end of September in Shanghai steel tube exhibition. During this visit, Mr.Ton visited our headquarters and factory, the two sides gave a comprehensive introduction and communication to each other in the meeting, which deepened the understanding of each other. From the production equipment, production equipment, inspection, packaging?shipment etc?the whole quality control system made Mr.Ton very satisfied , he expressed great interest and hope for long-term cooperation. Mr. Ton hopes that we can give more support on the payment terms for future orders, Xinyue provided solutions and agreed that we will be cooperative according to the actual needs of customers to cooperate with the correspo...

 Thanksgiving is the fourth Thursday of every year in November. This year's Thanksgiving is November 22nd. The festival will send a greeting to all the customers. Like the European countries, the Australian countries, and the Hong Kong/Macau region, actually they are not celebrating Thanksgiving. The suddenly greeting message are abrupt. Just like suffering from an earthquake in a certain area, I immediately sent a greeting to the customer in the corresponding country. It was originally an earthquake in City A. Your customer is in B city, and the distance is very far away. People will only feel a sigh of relief when they receive your condolences. Above countries have been Thanksgiving: Argentina, Brazil, Canada, Japan, South Korea, Liberia, Switzerland and the United States, Grenada, and a city called Leiden in the Netherlands (other cities in the Netherlands http://www.tjxysteel.com/news/Which-Coutry-to-Celebrate-Thanksgiving-Day-651.html

 At the beginning of Sep,2018，a client send a Lance Pipe enquiry to our sales email address (sales@xysteelpipe.com) through our Tianjin Xinyue Steel Group's website (www.xysteelpipe.com). After a quick analysis about the enquiry, I send back an email to confirm some details about the material and ends with this client. Days goes by, I haven't received any feedback from this client. We can only know the contact name and their company name, that's all. And the most weird part is that I could find nothing about their company's information on the Internet. Which makes me really really upset. "Try to search their Skype account with their email address." Josie, one of my warmly colleague remind me. Wow, I got a big surprise by doing that. After communicating with my client, all my doubts were solved. Somehow, my email was regarded as garbage email by my client’s mail system, and my client delete all her garbage email directly without any check, and she was sorry abo...

 The welding process of high-frequency welded steel pipe (erw) is carried out under the condition of fast heating rate and high cooling rate. The rapid temperature change causes a certain welding stress, and the structure of the weld also changes. The structure in the welding center area along the weld is Low-carbon martensite and small area of free ferrite; the transition region is composed of ferrite and granular pearlite; and the parent structure is ferrite and pearlite. Therefore, the performance of the steel pipe is due to the difference between the metallographic microstructure of the weld and the parent body, which leads to an increase in the strength index of the weld, while the plasticity index decreases, and the process performance deteriorates. In order to change the performance of the steel pipe, heat treatment must be used to eliminate the microstructure difference between the weld and the parent metal, so that the coarse grains are refined, the structure is uniform, t...