A comprehensive enterprise integrating production and sales

Tianjin Youfa Steel Co., Ltd. is a manufacturer specializing in the research and development, production, sales and service of carbon steel coils, galvanized sheet coils, carbon steel pipes, galvanized pipes, alloy pipes and seamless pipes. There is inventory

No. 7, Hengxing Road, Daqiuzhuang Industrial Zone, Jinghai District, Tianjin

Tianjin Youfa Steel Co., Ltd. is a manufacturer specializing in the research and development, production, sales and service of carbon steel coils, galvanized sheet coils, carbon steel pipes, galvanized pipes, alloy pipes and seamless pipes. There is inventory

superior and the transportation by sea

Tianjin Youfa Steel Co., Ltd. is a manufacturer specializing in the research and development, production, sales and service of carbon steel coils, galvanized sheet coils, carbon steel pipes, galvanized pipes, alloy pipes and seamless pipes. There is inventory

Production technology and application of epoxy coal tar anti-corrosion steel pipe

The production process and use of epoxy coal tar pitch anti-corrosion steel pipe; the three-layer PE production process of epoxy coal tar pitch anti-corrosion steel pipe: at the beginning of production, first use the test pipe section to adjust the preheating temperature and the thickness of the anti-corrosion layer in turn on the production line. Production can start only after all parameters meet the requirements. 1. Use a heat source to heat the steel pipe to a suitable temperature. 2. The epoxy powder coating is evenly applied to the surface of the steel pipe. 3. The coating of the adhesive is carried out during the gelling process of the epoxy powder. 4. The polyethylene layer can be coated by longitudinal extrusion process or lateral winding process. For steel pipes with a nominal diameter greater than 500mm, the lateral winding process should be adopted. 5. When the lateral winding process is used, it should be ensured that the polyethylene in the overlapping part and the polyethylene on both sides of the weld are completely rolled and compacted, and the surface of the polyethylene is prevented from being crushed; when the longitudinal extrusion process is used, the two sides of the weld are not A void should appear. 6. After the polyethylene layer is coated, it should be cooled with water until the temperature of the steel pipe is not higher than 60℃. The interval between the application of epoxy powder and the start of cooling of the anti-corrosion coating should ensure that the fusion-bonded epoxy coating is fully cured. 7. After the anti-corrosion coating is completed, the polyethylene layer at the end of the pipe should be removed. The reserved length of the pipe end is 100mm to 150mm, and the end face of the polyethylene layer should form a chamfer of less than or equal to 30°. 4.8 After the pipe end is treated, according to the user's requirements, the surface of the bare steel pipe can be painted with anti-rust and weldable coating. Anti-rust weldable paint should be applied according to the product specification. The application of epoxy coal tar pitch anti-corrosion steel pipe is very extensive, and the performance after drying is also very good, but it is easy to deteriorate due to high temperature or humidity during storage and use. Therefore, it should be kept away from heat sources or open flames before it is dried and formed, and it should not be exposed in a humid environment. Its application in underground oil pipelines is very common. For example, epoxy coal tar pitch anti-corrosion steel pipe is a pipeline facility with steel pipe and epoxy coal tar pitch coating as the main structure. It is a relatively common underground oil pipeline.

The difference between steel jacketed steel insulation steel pipe and ordinary steel pipe

In our life, no matter where we are, we can see the figure of steel sheathed steel thermal insulation steel pipe, but everyone has a very narrow understanding of steel pipe. They think that there is only one kind of steel pipe. There are two kinds of steel pipes, that is, steel jacketed steel insulation steel pipes and ordinary seamed steel pipes, and these two kinds of steel pipes are completely different in terms of production and use, but it is impossible to lose anyone. Now most of the steel pipes we use in our lives are steel jacketed steel thermal insulation steel pipes. In fact, steel jacketed steel thermal insulation steel pipes are a kind of hollow section, and there are no welds and other linked steels in the pipes, and steel jacketed steel thermal insulation pipes are insulated. The production process of the steel pipe is also very troublesome. First, the solid pipe is perforated to make the precursor capillary of the steel sheathed steel thermal insulation steel pipe, and then the steel pipes for different purposes will be respectively cold drawn or hot rolled to make the steel sleeve. Compared with ordinary round steel pipes, such non-steel steel pipes have strong compressive capacity, and the weight of steel pipes is also very light. It is used in various fields of life, such as construction, transportation, parts and so on. A kind of steel pipe is also used in life, which is seamed steel pipe. This kind of steel pipe is welded by twisting flat steel, so there will be welds left on the outside of this type of steel pipe. The use of seamed steel pipe The field is relatively narrow, generally used in the transportation of water and gas, and the use time is far less than that of steel-jacketed steel insulation steel pipes, and many seamed steel pipes will be unintentionally broken and damaged during installation. , the quality needs to be improved.

How to grind high-quality carbon steel plate

Carbon steel sheets are widely used in many professional machinery equipment and large structural parts in the manufacturing industry, for example, in the engineering, energy and mining machinery industries, many products use steel sheets with a thickness of 6-20 mm. Some of these sheets are flat sheets without hollows, while most are sheets with 30% porosity. Their specifications and dimensions vary by product and use. After these carbon steel sheets are cut by plasma or oxygen, different degrees of flash, slag and burrs will be left on the cut surface. These must be removed, otherwise it will affect the aesthetics and usability of the finished product. Carbon steel plate Some enterprises perform artificial surface treatment on carbon steel sheets after thermal cutting, mainly using hand tools such as hand grinding wheels, scrapers, and steel hammers for knocking and sweeping. The disadvantages of this sanding method are: (1) Quality cannot be guaranteed. Manual grinding cannot guarantee the uniformity and thoroughness of grinding, and will affect subsequent bending, spraying and other processes, and affect the overall appearance and internal quality of the product. (2) The efficiency of manual grinding is difficult to master and count. It all depends on the work status and proficiency of the employee and cannot be guaranteed. (3) Environmental protection issues. The knocking brings dust and slag splashing, which seriously pollutes the air quality and environment inside and outside the work area. (4) There are certain security risks. In addition, the flying slag produced by grinding the workpiece and the handling of heavy objects are the main hidden dangers of personal injury accidents. In recent years, some companies have also tried to solve the slag and burr problems by mechanical means. In the current market, there are roughly two solutions. Carbon steel plate The first is the traditional dry single-sided grinding scheme. The workpiece is continuously ground by setting up multiple grinding heads on the top of the table. The grinding media used basically belong to the cloth-based abrasive belt and its modified grinding head. In this way, not only the cost of consumables is high, but also the time and frequency of replacing consumables will cause a huge waste of time. Also, generally speaking, the workpiece needs to be machined on both sides. With this single-sided grinding scheme, after single-sided grinding, the workpiece needs to be turned over to complete the final processing requirements, which greatly reduces the processing efficiency. The second is dry double-sided processing technology. Production line processing, the workpiece is clamped and ground by several sets of opposite clamping rollers. The advantages of this processing method can be described as: (1) The processing effect is good. No residual slag and burrs. The surface treatment effect of a single piece is the same as that of the whole batch of workpieces, which is unmatched by manual processing. (2) High processing efficiency. Using advanced double-sided simultaneous processing technology, the efficiency is increased by at least 60% compared with traditional processing methods. (3) Save a lot of human resources. For continuous processing on the production line, only two employees are needed for loading and unloading. (4) Energy saving and environmental protection. The production line is equipped with a high-efficiency dust removal system. The grinding dust is strictly controlled in the body, completely collected by the dust collector, and can be directly discharged after filtering. However, the high price of such a production line is undoubtedly a considerable expense for the majority of small and medium-sized enterprises.