steel pipe

 The sun was shining brightly in the winter.Tianjin xinyue steel group welcomed the quality inspection personnel from the headquarters of SGS, a third-party inspection institution, Accompanied by the sales department and technical department of our company, the LSAW steel pipe of Qatar project was started inspection before shipment. These LSAW are used in the offshore piling project in Qatar, which requires high performance of the products. After the quality inspector had a better understanding of the production process and products, we submitted a complete set of production process documents. Then we started the final test of this project. This project is a single product size: ASTM A572 Gr 50 813*12.5*12M, with a total order quantity of hundreds tons.The quality inspector is very professional to test all the dimensions one by one, and at the same time to test the spray marking, appearance and other items around 50% of the order quantity.After a whole day's preliminary examination...

 Decarburization is a phenomenon in which the surface carbon content of the steel pipe (CS seamless pipe) decreases during the heat treatment process. The essence of decarburization is that the carbon atoms in the steel tube react with the furnace atmosphere such as hydrogen or oxygen at high temperature to form methane or carbon monoxide. Decarburization is the result of inter-atomic diffusion during heat treatment. On the one hand, oxygen diffuses into the steel; on the other hand, carbon in the steel diffuses outward. A decarburized layer can only form when the decarburization rate exceeds the oxidation rate. When the oxidation speed is high, no obvious decarburization phenomenon occurs, that is, after the decarburization layer is formed, the iron is oxidized to form an oxide scale. Therefore, in an atmosphere with relatively weak oxidation, a deeper decarburized layer can be formed. The decarburization layer of the steel pipe includes two parts: the full decarburization layer a...

 In early December, Shi Jian, a senior engineer from the United States, started a three-day visit. The visit was aimed at the final supplier audit of the South American coastal construction. The project is mainly used for piling construction of the terminal. The terminal company has been reviewed for two months, and the final plan and supplier candidate list have been confirmed. Mr Shi is a senior engineer at the terminal and has been a registered anti-corrosion engineer for many years. He has decades of experience in steel pipe production and coating. The type of steel pipe required for this project is a spiral pipe with an outer diameter of nearly 1 meter and a single length of more than 40 meters. The outer wall needs to be coated and has high technical requirements. Xinyue is brave enough to accept any authoritative inspection.Beside, Xinyue steel has long-time experience in manufacturing long steel piles. After three days, the customer conducted a comprehensive review of the f...

 Our company mission : To promote steel industry, To represent Made-in-China . We always keep our mission in mind and stick to it consistently in every project. In early December 2017, Xinyue received an inquiry for 300 tons of X70 spiral steel tubes from Europe customers. The professional quotation sheet and all technical documents of Xinyue Spiral Steel Pipe Bench marking Project were submitted firstly. One month later, the customer sent an inquiry sheet for another 800 tons of straight submerged arc steel pipe of the same project, with more than 30 specifications, each with a drawing requirement. X70 material, wall thickness up to 75 mm, ordinary T-welded pipe can not meet the technical requirements. Xinyue organized the point-to-point drawings of technical departments. The technical documents were revised six times, and the final specifications were changed from 32 to 17 accepted by customers. It took five months. In April 2018, customer orders finally arrived. The total projec...

 On December 17, 2018, Tianjin Xinyue Steel Group welcomed the inspection of a third-party inspector appointed by customer. The inspection was mainly for the inspection of the New Zealand pile pipe project before procurement. The project is a single product size, with a total order volume of more than 4,700 tons of ERW for bridge construction. The length of each pipe varies from 6 to 23 meters. The audit is mainly for Tianjin Xinyue's factory qualification, laboratory qualification, raw material traceability documents, production control records, technical documents, and factory workshop equipment inspection. The auditor Tianjin Xinyue gave a detailed introduction and communication to inspector, and showed all of our qualification documents and past project records. The technical staff of Xinyue also gave professional advice to the inspector's questions. Inspector gave high marks to our factory's quality control system, whether it was from production equipment, raw material...

 Last week, Tianjin Xinyue Group ushered in a four-person inspection tour of an Israeli customer. Accompanied by our sales department and the factory technical department, the pre-purchase inspection of the Israeli construction steel plate project was carried out. The technical requirements of the project for steel plates are extremely high. This inspection also greatly promotes the development of good cooperation between Xinyue, steel mills and contractors. During the entire inspection period, the customer first looked at the rolling mill line and had an understanding of the equipment and production process. Due to the customer's neatness and flatness of the steel plate, the requirements are very high. Then we took the customers to visit the shot blast line and the painting line. For the project, the technical parameters of the steel plate are confirmed by the customer and the technician and production manager of the factory. And witnessed the laboratory's experimental process...

 In the process of purchasing seamless steel pipes, we often encounter several steel pipe length terms. If we cannot fully understand these terms, hidden dangers will often be buried in the signing of the contract, which will bring inconvenience or heavy losses to our later use. Therefore, we should fully understand these terms in the procurement process and confirm the reasonable length of seamless steel pipe we need: Delivery length: The delivery length is also called the length required by the user or the length of the contract. The standard has the following provisions on the delivery length: ①Normal length (also known as non-fixed length): Any length within the length range specified by the standard and no fixed length requirement is called ordinary length. For example, the structural pipe standard stipulates: hot-rolled (extrusion, expansion) steel pipe 3000mm ~ 12000mm; cold drawn (rolled) steel pipe 2000mm ~ 10500mm. ② Length of fixed length: The length of fixed length shou...

 There are many reasons for longitudinal cracking of seamless pipes, both material and process reasons. Taking the thick-walled seamless steel pipe as an example, if the thick-walled seamless steel pipe has poor plasticity or poor annealing, the probability of longitudinal cracking will increase, but the fundamental reason is that the residual stress of the cold-drawn thick-walled seamless steel pipe is large. According to the concept of cracking mechanics, the cracking of components is the result of the formation and propagation of internal micro-cracks. The longitudinal cracks of thick-walled seamless steel pipes are basically brittle cracks, and the cracks are in the form of openings. In general, the existence of metal microcracks is unavoidable, but under the same material conditions, the generation of cracks depends on the tensile stress of the component. The tensile stress affecting the member can either be loaded outside the member or exist in the residual stress of the memb...

 Every year after January, it will enter the peak period of production. As the temperature get warmer, projects in domestic and foreign markets will start to accelerate.The good market situation makes each department of Xinyue Steel stick to the post every day to serve customers. Recently, Tianjin Xinyue once again exported a batch of German standard rail to southeast Asia.Used for the north-south railway in southeast Asian countries, but also a part of the short size rail, used for the replacement of old rail. With regard to rail, we have very good experience in operation. We have exported rail to other countries for infrastructure construction, and we have had partners come to China to negotiate with us about the material supply of railway projects.In the operation of the export rail, when our inspector tests, he will make detailed mapping and record data according to the drawings, and strictly control the technical parameters marked in each drawing, so as to ensure that the good...

 In February 2019, we received the inquiry from the Thai customer TPC. They wanted the seamless pipe made of JIS G344 STK490 in the Japanese standard, and required fast delivery. We offered the best price and delivery date to the customer immediately. The required seamless tube is mainly used for the Thai Royal Project, TPC is the main contractor to improve this existing dam. The client attaches great importance to the quality of product, and ask the outside coating, but in the hesitation is choose ordinary anti-rust black paint or epoxy resin, Xinyue has provided the coating related technical data to the customer for reference, and introduced the process and application in details for different kind of coating, customers are very satisfied, Xinyue's strength and rich experience in export to win customers recognition. Although our quotation exceeded the client's budget, but the client believed the product quality of xinyue and finally agreed to increase the budget a little. Xin...