Large-diameter straight seam steel pipes can be used as dredging pipes , which are mainly used to clean steel pipes conveying sediment, mud and other mixed debris.

What is a petroleum steel pipe? The petroleum steel pipe is a long steel with a hollow section and no joints around, and the petroleum cracking pipe is an economical section steel.

What are the precautions for using oil casings? The oil casing is used to support the oil and gas well walls to ensure the normal operation of the entire well after the drilling process is completed. Each well is based on different depths of drilling and geology, using several layers of casing. After the casing is down, the cement is to be cemented. It is different from the oil pipe and the drill pipe and cannot be reused. It is a disposable material.

The history of oil casing development. After nearly 20 years of hard work, China's oil casing production has gone from scratch, from low price to high price, from low steel grade to API series products to special demand non-API products, from quantity to quality are close The level of foreign oil casing products. The domestic market share of China's oil well pipes has exceeded 80%, and has been a net export product for many years.

What is the type of line pipe tempering? According to the performance requirements of pipeline steel pipes, depending on the tempering temperature, tempering can be divided into the following types:

Structural performance comparison of seamless steel tubes. Carbon structural steel pipe: This kind of structural steel pipe is generally smelted by converter or open hearth furnace. Its main raw material is molten iron and scrap steel. The content of sulfur and phosphorus in steel is higher than that of high quality carbon structural steel pipe. Generally, sulfur is ≤0.050% and phosphorus is ≤0.045%.

The application of galvanized flat steel has also expanded correspondingly with the development of industry and agriculture. Therefore, the enterprises engaged in the production of galvanized flat steel in China are also required to have higher requirements for the galvanized flat steel. It is also because of the high new reference price of galvanized flat steel, so the production and process requirements are also very high, so the application range and type of flat steel is also very rich. So what is the difference between galvanized flat steel and round steel?

The main difference between different hot-dip galvanizing methods is how to activate the surface of the tube after acid leaching to improve the quality of galvanizing. Dry and redox methods are mainly used in production, and their characteristics are shown in the table. Galvanized steel pipes can be classified into hot-dip galvanizing and electro-galvanizing. Hot-dip galvanizing includes wet, dry, lead-zinc and redox processes.

Ellipse area formula S = ∏ (pi) × a × b (where a, b are the long semi-axes of the ellipse and the length of the short semi-axis respectively). Then the volume V = [∏ (pi) × a × b - ∏ (pi) ) × (a-2) × (b-2)] * 1000 mass M = V * P (density, look up the table)

The difference between the manufacturing process of galvanized pipe and galvanized steel pipe: galvanized steel pipe and hot-dip galvanized square pipe are two categories of steel pipe. Zinc plating means that the surface of the steel pipe is galvanized, which may or may not be welded pipe.

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.

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!

　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.