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.

The invention provides a protective coating for oil pipes and wellheads and downhole equipment used in oil and gas drilling, oil recovery and transportation. The protective coating comprises, by weight percentage, 55 to 95% of polyphenylene sulfide, 3 to 30% of adhesion enhancer, and 1 to 20% of abrasion resistant enhancer. A surface wettability converting agent may also be included in the range of 1 to 15%. It can prevent or reduce the high temperature, high pressure, high hydrogen sulfide and carbon dioxide, high salt content and other strong corrosive media on the erosion, corrosion and waxing, scaling and hydrate blockage, reduce friction and reduce production costs. Improve the overall performance and service life of oil pipes. The present invention also provides a method of preparing such a protective coating and a method of constructing the same.

An ISO 9001:2008 certified company, Victor Steel supplies a wide range of ASTM A312 TP 316L Stainless Steel Seamless Pipe to customers across world.Our focus is on providing customers with high end steels that are not rolled or stocked locally.We are leading ASTM A312 TP 316L Stainless Steel Seamless Pipe manufacturer in Mumbai, Maharashtra Grade 316L, the low carbon version of 316 and is immune from sensitisation (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm). There is commonly no appreciable price difference between 316 and 316L stainless steel.victor Steel is leading ASTM A312 TP 316L Stainless Steel Seamless Pipe manufacturers in rajkot, Gujarat 316L stainless steel tends to work harden if machined too quickly. For this reason low speeds and constant feed rates are recommended.316L stainless steel is also easier to machine compared to 316 stainless steel due its lower carbon content.

1. Introduction to seamless steel pipe The seamless steel pipe is a circular, square, rectangular steel with a hollow section and no seams around it. The seamless steel pipe is formed by perforating a steel ingot or a solid tube blank, and then hot rolled, cold rolled or cold drawn. The seamless steel pipe has a hollow section and is used as a pipe for conveying fluid. Compared with a solid steel such as round steel, the steel pipe has a lighter weight when it has the same bending and torsional strength, and is an economical section steel which is widely used for manufacturing structures. Parts and mechanical parts, such as steel scaffolding for oil drills.

Properties of Galvanized Steel Pipe Welds Galvanizing has been used to protect iron and steel from rusting for over a hundred years in places as diverse as the wire rope used for the suspension cables on the Brooklyn Bridge to gutters on houses. Galvanizing is simply coating of zinc over steel. Like paint, galvanizing protects steel from rusting by forming a barrier between the steel and the environment, but galvanizing goes one giant step further than paint — it also provides electrochemical protection of the steel. Since zinc is electrochemically more reactive than steel, it oxidizes to protect the steel near it; as a result, even if a galvanized steel surface is scratched down to the bare steel, the galvanizing coating will prevent the steel from rusting. Galvanized steel is, therefore, a superior product to steel with any other type of coating on it since it protects the steel even when the coating is damaged in handling or in service.

The corrosion resistances of enamel-coated steel pipe in 3.5 wt% NaCl solution was evaluated and compared with those of epoxy-coated pipe using open-circuit potential, linear po- larization resistance, and electrochemical impedance spectros- copy tests. T-001c enamel slurry and GP2118 enamel powder were sprayed to steel pipe in wet and electrostatic processes, respectively. The phase composition and microstructures of the two enamels were characterized with x-ray diffraction and scanning electron microscopy (SEM). The surface roughness of enamels and their bond strength with steel substrates were quantified to understand coating quality. SEM images revealed that both types of enamel coatings have a solid structure with isolated bubbles. Electrochemical tests showed a high corrosion resistance of the enamel coatings as verified in visual inspection on the tested samples. In particular, the GP2118 enamel-coated samples consistently outperformed the epoxy-coated samples.

Stainless steel welded pipe needs to be protected by nitrogen when welding. What is the principle of nitrogen-protected stainless steel welded pipe ?