The galvanized square tube belongs to the price transition period. The focus of the government regulation is still to adjust the surplus under the premise of steady growth. Therefore, in a relatively long period of time, most domestic industries are still destocking. Lord, during this period, spot pressure will still have a greater constraint on the rise in futures prices.

Perforation is the first process of deformation of hot-rolled seamless steel pipe, and its function is to pierce the solid tube blank into a hollow capillary tube. Since the surface defects or eccentricity (uneven wall thickness) of the pierced capillary tube are difficult to eliminate or reduce in the subsequent deformation process, the quality of the perforated capillary tube has an extremely important influence on the quality of the hot rolled seamless steel pipe. The tube blank perforation method includes pressure punching, push-rolling perforation and cross-rolling perforation.

Steel structure refers to a structure mainly composed of steel materials and is one of the main types of building structures. The structure is mainly composed of steel beams, steel columns, steel trusses and other components made of steel and steel plates, and the joints, bolts or rivets are usually connected between the components or components. Because of its light weight and simple construction, it is widely used in large factories, stadiums, super high-rises and other fields.

The steel market continued its rebound last week. In addition to the weak and weak market, other major varieties of construction steel continued to rise. As the traditional terminal replenishment demand started before the Ching Ming Festival, the steel market transaction improved. However, in the second half of the week, after the steel price continued to rise and the demand for short-term replenishment of the terminal weakened, the situation of steady price decline also appeared. After a narrow period of consolidation in the previous period, the confidence of the domestic market has been adjusted.

Q345 channel steel price market traditional sales season, and because of the "golden nine" market failure, the market will habitually think that the delay of the peak season, may eventually fall to October, so before the National Day, the market for " The Silver Ten” peak season still has high expectations, and after the steel price has been consolidated for more than a month, there are conditions for a rebound. However, from the latest data released during the National Day, although the Chinese manufacturing PMI rebounded to 51.1% in September for three consecutive months, the final value of HSBC China's manufacturing PMI was only 50.2%, far less than expected and initial value. In addition, the PMI index of the steel industry for the month was only 49.2%, which fell sharply by 4.2 percentage points from the previous month and fell back below the dry line.

High-quality resources are tight and the price is high. Some mines have increased mine use, mine sales are better, traders are more active, and small and medium-sized mines are starting to improve slightly. However, most mines are still not satisfied with the current sales price. Under the premise of not having too much financing cost, the enthusiasm for returning to work is not high. Imported mines have recently been weak, and the mines have no suitable price hikes for the time being. Therefore, it is expected that the price of Shandong domestically produced ore will be stable this week.

The laser cutting process of petroleum screens has obvious advantages and can be used in the cutting process of many products. Hebei Rui Nair Petroleum Pipeline Equipment Co., Ltd. is a professional oil screen pipe manufacturer with advanced laser cutting machine. The quality of the oil screen produced is better and has been well received in the market.

The main dip dyeing of the drilling screen is to prevent sand. Because of the geology where the oil is mined, the steel grade and type of the unsuitable sand layer are not different. Drilling screens are cut into a number of longitudinal or spiral or cross-shaped cracks of a certain size in a variety of ways on oil casings or oil pipes.

Although the J55 oil casing market has an obvious upward trend, domestic injection coal prices are still quoted lower. It is reported that the average inventory and available days of coal injection in the national sample steel mills showed a slight increase. Some local small mines have gradually resumed production, but the current situation is not universal. Steel mills do not express their views on the rising purchase price.

A specially designed slotted screen trapezoidal wire winding is welded on a set of support wires arranged in a circumferential arrangement. Full-program welding ensures a strict continuous integrity of the product, resulting in a shape 2. The trapezoidal wire continuous winding forms a continuous high-density uniform gap on the circumferentially arranged support wires, ensuring the open area of the screen and non-blocking It avoids the high-density accumulation of sediments and provides a guarantee for increasing production efficiency and extending the service life of wells.

The domestic API5CT oil casings have been operating slightly, the steel mills' prices have increased slightly, the market transactions have improved, and the manufacturers' confidence has increased; the steel pipe market price has been slightly chaotic; the domestic molybdenum market has been generally sold, and the prices have fluctuated and consolidated; the domestic vanadium market The overall performance was slightly weaker, and the overall price showed a slight loosening;

Hot rolled products are generally divided into two categories, one is hot rolled slabs and the other is hot rolled coil. Hot-rolled thick plate refers to aluminum alloy sheet with a thickness of not less than 6.0mm. The main varieties are hot-rolled sheet (H112), annealed sheet (0), quenched or quenched pre-stretched sheet, etc. Hot-rolled thick plates are usually used in hot rolling mills. It is produced by the block method. The typical process flow is: ingot (homogenization) → milling, milling edge - + heating + hot rolling shear interruption straightening.

Hot-rolled steel is a steel that has been heated and rolled at a high temperature. Its strength is not very high, but it is sufficient for our use. Its plasticity and weldability are good, so we use it more often; cold-rolled steel is ordinary hot rolling. Steel is strongly drawn beyond the steel in the strain hardening stage, its strength is high, but the toughness and weldability are poor, relatively hard and brittle!

Great wisdom ASDOCKS news agency on June 19, Malaysia's Ministry of International Trade and Industry announced on Wednesday, anti-dumping investigations on hot-rolled coils, plaid coils and pickled oil-coated coils from China, Indonesia and South Korea.

The HIsmelt process is the first commercial realization of the HIsmelt process. It is also the only new ironmaking process that can be used without coke and iron ore fines. Compared with the current blast furnace ironmaking process, it has ultra-low emission. The advantages of environmental protection and low investment cost, and the use of low-quality iron and carbon-containing raw materials to produce high-quality clean molten iron, this process provides a new idea for the transformation and upgrading of the steel industry.

　Steel heat treatment is a process that changes the structure and properties of solid steel materials through certain processes such as heating, heat preservation and cooling. Compared with other processing techniques, heat treatment generally does not change the shape of the workpiece and the overall chemical composition, but rather imparts or improves the performance of the workpiece by changing the microstructure inside the workpiece or changing the chemical composition of the surface of the workpiece. It is characterized by improved internal quality of the workpiece. Heat treatment is especially important for steel materials.

Through trial and error, flame retardant and antimony trioxide were selected as flame retardant formulations and blended with polyethylene pellets. Chongqing PE flame retardant must be divided into gas phase in polyethylene.

The hot-rolled precision welded pipe is made by continuous casting round billet or initial rolling slab, walking beam heating furnace, high-pressure water descaling and then entering the rough rolling unit. The roughed material is cut, tailed, and then entered into the finishing mill and controlled by a computer.

manufacturer introduced the surface treatment method of large-diameter hot-dip tube. 1. Cleaning: Clean the surface of the steel with solvents and emulsions to remove organics such as oil, grease, dust, and cleaners, but not the rust and scale of the steel surface. It can only play a complementary role in the production of corrosion protection.

What are the methods for calculating the parts of small-diameter seamless steel pipes ? (1) Primary production process of hot rolled seamless steel pipe (delta initial inspection process): Billet piercing and rolling heating preparation and inspection steel pipe sizing (reduction) heat treatment straightening finished pipe finishing inspection library

　(1) Chongqing galvanized pipe , the pure zinc layer is densely covered on the surface of the steel, which can avoid any corrosion solution contacting the steel substrate and protect the corrosion of the steel substrate. In the general atmosphere, a zinc layer is formed on the surface of a thin layer of dense zinc oxide layer, which is hardly soluble in water, so the protection of the steel substrate. If other components of zinc oxide and the atmosphere form insoluble zinc salts, then the anti-corrosion effect is more ideal.