Seamless Steel Pipe

 　　After 3 months , the spiral pipe OD1824X12MM， provided by Tianjin Xinyue to the Philippines ，was finally successfully completed, and these pipes were used for local bridge construction. 　　In mid-May, the Philippines customer placed an order of steel pipes for bridge construction , which is 8 containers. In mid-June, the goods were successfully produced in accordance with customer requirements. 　　In order to avoid any damage to container loading steel pipe during the shipping process, we have strengthened the packing of this cargo. One steel pipe and one container, 2 meters apart, the two side of pipe body are fixed with wooden piles, and wire ropes are reinforced every two meters to ensure that the goods cannot roll during transportation. All the photos of the reinforced packing were sent to the customer for confirmation, and the customer highly recognized the high-quality products and professional services provided by Xinyue. 　　The first phase of construction will come to an en...

 　　Today, we are talking about a UAE customer who has worked with Xinyue for the first time since the end of 2020. The customer's projects are all over the world. During the cooperation, the product needs of customers were complex, involving all kinds of steel products. In order to meet the customer's needs, we constantly upgraded our supplier resources and expanded the product types, ensure the high quality, the accurate delivery time and the fast delivery of each order. Because of such strong guarantee, we successfully cooperated with customers for 7 orders during half of a year. 　　In June 2021, we received the customer's inquiry. This order sent to Middle East with 1200 tons of galvanized steel coil. At the end of last year, the project ordered the same product with 600 tons, which had successfully shipped at the beginning of this year. After receiving the goods, the customer praised the products “Made in China”, therefore, Xinyue got the opportunity of reorder from cust...

 　　In August 2021, Xinyue successfully shipped a batch of high-quality pipelines to Ecuador. This was the first time for us to cooperate with customers. We knew each other and received an inquiry in May 2020. Then, the business specialist contacted and communicated with customer in detail. We knew the product required were used in the oil transportation project of Ecuador oil company. Moreover, the project party had strict requirements on the pipe and anti-corrosion. The technical requirements were much higher than the API 5L standard, all steps must be implemented in strict accordance with the technical documents. 　　The product required in this order was API 5L x70m psl-2, externally coated with FBE anti-corrosion, and a total of 1495 tons of LSAW steel pipes. In order to better serve customers, the technology department issued documents based on requirements of customer, such as welding process qualification and inspection plan. At the same time, the business department also subm...

 　　In July 2021, the customer from Germany sent us an inquiry for seamless tube, with a total of 37 items, with diameters ranging from 21.3mm to 812.8mm. 　　The standard requires SA106 GRB, SA312 TP316 and SA335 P11/P91 gross tonnage of 52 tons, which requires production in PED certified factories. 　　Due to the customer's demand for lots of items, But the quantity is small and the customer requires the PED certificate certification of the factory production.Therefore, it needs good resource integration ability and execution ability.At the same time, we gave the customer enough confidence and trust. Finally, the customer confirmed to purchase this order from Xinyue Steel Group. 　　In the process of order execution, product production and inspection are very complicated, and packaging in different lengths is hard also.Moreover, the customer requires the goods to be packed separately into 3 containers and required wooden packing in containers, which brings great difficulties to the prod...

 　　UAE regular customers have purchased more than 10 times from Xinyue since we started cooperation in 2017. We are not only business partners, but also loyal friends. Every time the customer has a new procurement demand, they will first send it to Xinyue or ask Xinyue to help introduce suitable suppliers, because Xinyue will provide customers with super quality products and services every time, and be the solid backing of customers wholeheartedly. 　　At the end of August, the customer informed us that the last order of aluminum sheet trial order had been received. The end user was very satisfied with the products, and the affirmation from the customer was the biggest motivation for us to move forward. The customer informed that the bulk order is expected to be delivered in three shipments. Now they need to purchase the first batch and the delivery required at the end of September. The size of the new order is slightly different from the trial order, divided into three widths, but t...

 　　There are many standards for selecting oil casing manufacturers, which can be divided into short-term standards and long-term standards according to the length of time. The short-term standards for selecting oil casing manufacturers mainly include product quality, price level, timely delivery and overall service level. 　　1. Product quality 　　The quality of the purchased oil casing meets the requirements of the purchasing unit is a condition that the purchasing unit must consider when purchasing the oil casing. Poor quality and low price casing products have lower procurement costs, but will lead to an increase in the total cost, but if the quality is too high, it will far exceed the production requirements, which is also a waste. Therefore, the quality requirements of the oil casing in the procurement The production needs of the enterprise must be consistent, and the requirements are too high or too low are not appropriate. 　　2. Lower cost 　　A lower purchase price is an importan...

 　　According to the different requirements of the production process of the oil casing pipe, the length measurement system of the oil casing also has a variety of measurement methods. Let us look at the basic three measurement methods. 　　1. Length measurement with grating ruler 　　The basic principle is to install two fixed-length grating rulers on the outer side of the oil casing pipe. The rod-shaped cylinder is used to drive the grating rulers near the two ends of the oil casing pipe. The length of the oil casing pipe is measured by the phenomenon of light interference. 　　It has the characteristics of high precision. However, grating rulers are expensive, difficult to maintain, and sensitive to dust and site vibration. 　　2. Camera length measurement 　　Camera length measurement is achieved through image processing. The principle is to install a series of equidistant photoelectric switches on one section of the oil casing conveying roller, and add a light source and a camera on the ...

 　　There are two main factors that cause surface corrosion of precision seamless pipes: chemical corrosion and electrochemical corrosion. 　　(1) Chemical corrosion 　　1. Surface contamination: oil, dust, acid, alkali, salt, etc. attached to the surface of the workpiece are transformed into corrosive media under certain conditions, and chemically react with certain components in the stainless steel parts, resulting in chemical corrosion and rust. 　　2. Surface scratches: All kinds of scratches damage the passivation film, which reduces the protective ability of stainless steel, and is easy to react with chemical media, resulting in chemical corrosion and rust. 　　3. Cleaning: After pickling and passivation, the remaining liquid will remain and the stainless steel will be directly corroded (chemical corrosion) if the cleaning is not clean. 　　(2) Electrochemical corrosion 　　1. Carbon steel pollution: scratches and corrosive media caused by contact with carbon steel parts form galvanic cel...

 　　Annealing process of seamless steel pipe: 　　The seamless steel pipe is heated to a certain temperature, kept for a certain period of time, and then slowly cooled to room temperature. 　　Purpose of annealing: 　　a. Reduce hardness and improve plasticity to facilitate cutting and cold deformation processing; 　　b. Refine the grain, uniform the structure of the steel, improve the performance of the steel and prepare for the subsequent heat treatment; 　　c. Eliminate internal stress of steel and prevent deformation and cracking of parts after processing. 　　Annealing category of seamless steel pipe: 　　1. Fully annealed 　　Process: Heat the steel parts to the critical temperature (the critical temperature of different steels is different, generally 710~750°C, and the critical temperature of individual alloy steels can reach 800~900°C) 30~50°C, keep it for a certain period of time, and then slowly cool down with the furnace (Or bury it in sand to cool down). 　　Purpose: Refine grain, uniform...

 　　Heat-expanded steel pipe: First of all, in the appearance of the steel pipe, the heat-expanded steel pipe is red, and the inside diameter is lead powder. 　　In order to stop the hot expansion of steel pipes, the quality requirements of steel grades are very strict. Usually, steel pipes with strong shrinkage are used, and a kind of barren pipe finishing process is used to expand the diameter of pipes by skew rolling or drawing. In this way, the steel pipe can be roughened in a short time to consume non-standard and special hot-rolled pipes. This kind of hot-rolled steel pipe has low cost and high consumption efficiency. However, the mechanical properties of the hot-expanded steel pipe are slightly worse than those of the hot-rolled steel pipe. 　　Hot-rolled steel pipe is more and more recognized because of its reasonable process, low energy consumption and good quality. Hot-rolled steel pipe is purchased for important parts because of its high cost when consuming large caliber. The...

 　　Quality requirements of seamless steel pipes in production: 　　1. Chemical composition 　　The chemical composition of steel is one of the most important factors affecting the performance of seamless steel pipes, and it is also the main basis for formulating pipe rolling process parameters and steel pipe heat treatment process parameters. 　　a. Alloying elements: intentionally added, according to the purpose. 　　b. Residual elements: brought in by steelmaking, properly controlled. 　　c. Harmful elements: strictly control (As, Sn, Sb, Bi, Pb), gas (N, H, O) 　　In order to improve the uniformity of the chemical composition of the steel and the purity of the steel, reduce the non-metallic inclusions of the tube blank and improve its distribution, the external refining equipment is often used to refine the molten steel, and even the electroslag furnace is used to reshape the tube blank. Smelting and refining. 　　2. Dimensional accuracy and shape 　　The geometric dimensions of seamless steel ...

 　　The drill pipe string will hit and wear the casing seriously during drilling. If there is a problem with the casing string in the hole, it will cause serious accidents in the hole, or even scrap Therefore, the quality of the drilled casing string must meet the following requirements. 　　1. Material requirements 　　The material of seamless steel pipe is generally selected according to parameters such as casing depth and quality. 　　When choosing the casing material, the quality of the casing string should also be considered. When the casing quality is less than 10t, ordinary low carbon steel grade can be selected; for 10-20t, steel grade DZ40～DZ50 should be selected; for ≥20t, steel grade above DZ50 should be selected. In addition, the material of the casing joint should be one level higher than the steel grade requirement of the casing body. 　　2. Casing bending requirements 　　The curvature of the casing means that the casing is curved in the length direction, expressed by the measu...