SSAW Pipe

    1. Seamless steel tubes of the same specification can be consulted by different manufacturers, and compared repeatedly, if they are much lower than the average value, they can not be bought. Any kind of product has a fixed cost. If the cost is lower than a certain range, it means that there is a problem with the quality of the product;     2. You can go to a large regular steel pipe company to purchase. Regular large companies generally purchase or agent from domestic relatively well-known large seamless steel pipe enterprises, and the quality is guaranteed. Regular large companies have many well-known customers who can provide good services to customers and will not sell fake and shoddy products to affect their reputation;     3. Some small companies on the market are raising prices, the quality of the products is not high, and the price of seamless steel pipes is very high. When choosing, consumers will find out after comparing, so when you buy se...

    With the continuous increase in the delivery pressure and steel grade of oil and gas pipelines, the requirements of ERW steel pipes for oil and gas transportation are also increasing. The number of ERW steel pipes used in submarine pipelines is relatively large, such as some oilfield group development projects and natural gas development projects. ERW steel pipe is formed by continuous roll forming of hot-rolled coils, which uses the skin effect and proximity effect of high-frequency current to generate resistance heat at the edges of the coils and cause metal melting. Pressure welding is performed under the action of squeeze rollers. Its characteristics: high welding speed, because the current energy is highly concentrated in the welding zone, the heating speed is extremely fast, so the welding speed is very high, the welding speed is generally between 10 m / min and 45 m / min; the heat affected zone is small, because the welding speed is high , The workpiece has a stron...

    Petroleum tubing: pipes used for oil production, gas production, water injection and acid fracturing in oil wells. API: It is the abbreviation of American Petroleum Institute in English, Chinese meaning is American Petroleum Institute.     Petroleum casing: a pipe that has been drilled from the ground surface as a lining to prevent the collapse of the well wall.     Line pipe : a pipe used to transport oil and gas.     OCTG: It is the abbreviation of Oil Country Tubular Goods in English, and the Chinese meaning is special pipe for petroleum, including product oil casing pipe, drill pipe, drill collar, coupling, short connection, etc.     API thread: Pipe thread specified by API 5B standard, including tubing round thread, casing short round thread, casing long round thread, casing trapezoidal thread, pipeline pipe thread, etc.     Special buckle: Non-API thread buckle type with special sealing performance, connecti...

    Reverse compression bending method: According to the heat treatment deformation law of shaft parts, reverse compression bending in the bending direction of the part to compensate the bending deformation generated after quenching can reduce the amount of straightening work. It is suitable for parts with obvious uneven section and severe deformation.     Static quenching method: The temperature of the quenching coolant must be uniform, and it is in a static state immediately after being homogenized before quenching.     Part design is uniform and symmetrical: The cross-sectional shape design of parts should be as uniform and symmetrical as possible.     Use special quenching jig for quenching: If the section of the part is symmetrical, it can be put into a special jig after the furnace is released, and then the part is quenched into the cooling liquid in the vertical direction.     Heating with embedded salt-bath furnace: The p...

    N80 casing pipe is an important equipment for oil drilling. The main equipment includes drill pipe, core tube and casing, drill collar, and small diameter drill pipe. Domestic oil casings are made of hot rolled or cold drawn steel and used for geological drilling. The steel grade is represented by "Geology" (DZ), and there are commonly used casing steel grades such as DZ40, DZ55 and DZ753.     1.N80 petroleum casing application     It is mainly used to support the well wall during and after drilling to ensure the normal progress of the drilling process and to ensure the normal operation of the entire oil well after drilling.     2. Specification of N80 petroleum casing     SY / T6194-96 stipulates that the length of oil casings made in China is variable, with a range of 8m / 13m, but casings of not less than 6m can be provided, and the number should not exceed 20%.     3. Types of N80 petroleum casing   ...

    1. The project cost is low.     Double-control directly buried heating pipelines can generally be constructed at a lower cost than trench laying projects.     2. Low heat loss and energy saving.     Because the direct buried insulation pipe uses polyurethane rigid foam plastic as the insulation material, its thermal conductivity is much lower than that of other commonly used pipe insulation materials in the past.     3. Anti-corrosion, good insulation performance and long service life.     Because the rigid polyurethane foam insulation layer is tightly adhered to the outer skin of the steel pipe , it prevents the infiltration of air and water, and can play a good anti-corrosive effect. And the outer polyethylene shell or glass fiber reinforced plastic shell has good corrosion resistance, insulation and mechanical properties.     4. It occupies less land, has faster construction, and is beneficial to en...

    1. There are two types of mechanical cutting: external installation and internal installation. It uses the principle of turning tool to cut the pipe mouth and bevel processing. The single machine has a large span, can be processed with large thickness, less waste, no pollution, no high temperature during the processing, does not affect the pipe material, and is beneficial to welding. Water cutting uses high-pressure pumps and silicon carbide to process pipes together. The cut is clean and the processing span is large, but its efficiency is low and the processing thickness is severely restricted.     2. Oxygen acetylene flame cutting, by adjusting the oxygen valve and acetylene valve, the mixing ratio of oxygen and acetylene can be changed to obtain three different flames: neutral flame, oxidation flame and carbonized flame.     3. Ion cutting, plasma cutting and different working gases can cut various metals that are difficult to cut with oxygen, es...