Seamless Steel Pipe

    There are a lot of stainless steel pipes on the market, and there are many brands. It is very difficult for lay people to identify the quality. This gives some stores the opportunity to deceive users, but using some simple methods to identify the quality is actually very effective. When you choose, do n’t just look at the price, but ignore the quality, choose some products that are more well-known than taught are more reliable.     The following is a simple and easy-to-learn method for distinguishing the quality of steel pipes. According to these 5 factors to identify, it is easy to buy high-quality steel pipes.     1. Appearance of steel pipe     2. Hydraulic test, tensile test, non-destructive testing     3. Chemical analysis of steel pipes     4. Steel pipe material list     5. Steel pipe implementation standards

    Thread parameter parameters limit the anti-sticking performance of oil casing pipe to a great extent. Reasonable control of the thread parameters can fully improve the anti-sticking performance of petroleum casing. In the use and production process of petroleum casing, the adhesion of petroleum casing depends to a large extent on the actual operating specifications. From a certain point of view, the effect is not less than the rigid requirements of petroleum casing.     1. The friction resistance of the threaded port of the API thread compound can be rotated to make the API opening greatly reduced. Generally, it is no problem to reduce it to 0.021. The API thread compound allows sufficient lubrication of the screw, the friction is reduced to a greater extent, and its abrasion resistance is greatly increased to a certain extent.     2. Increase the deduction speed. From the theory of adhesive wear, it can be seen that when the thread is connected, w...

    What should you pay attention to when welding seamless steel tubes?     1. To prevent the back surface of the bottom bead from being oxidized when performing butt backing, gas back protection is also required.     2. In order to prevent the appearance of welding pores in special-shaped pipes, if there is rust or oil stains on the welding parts, it must be cleaned up.     3. Dry elongation, general welding current is about 5mm when 250A or less, and about 20-25mm when 250A or more.     4. Arc length, MIG welding of stainless steel special-shaped pipe, generally welding under the condition of spray transition, the voltage should be adjusted to the arc length of 4-6mm.     5. Use flat welding power, reverse polarity when DC welding. Welding can be performed with a general CO2 welding machine, but the pressure of the wire feeding wheel should be slightly loosened.     6. Special-shaped pipe MIG welding is ...

    Various impurities can be reduced into the production layer: after acidifying the conventional oil casing pipe, the wax, rust residue and adherent instruments in the pipe will be brought to the formation. If we acidify the thickened tubing to the outside, magazines such as scaling, waxing, and rust residue in the tubing can be removed to reduce the pollution of the tubing to the formation during construction.     To avoid secondary pollution to the oil layer when performing well killing operations: One of the effective methods to improve oil production fluids is to quickly clean the formation. The reason is that after the formation is treated with acid solution, precipitation and liquid leakage will occur. The outer thickened tubing can be used to easily replace the formation with nitrogen, and the outer thickened tubing can be lifted out of the wellhead without well killing. Because the outer thickened oil pipe is a relatively closed loop system, the staff can...

    Seamless steel tubes have become very common in life. Do you know how many grades of seamless steel tubes can be divided into?     First, the surface of general hot-rolled seamless steel tube products is FA, and the seamless steel pipe products after pickling are FB. The product quality of cold rolled seamless steel tube is FB / FC / FD.     Ordinary seamless steel tube products are not high in surface requirements. For example, automotive interior panels use FB surface; for some general requirements, not particularly high automotive exterior panels, use FC; high-end vehicles, use FD surface.     The pickled seamless steel tube product is usually FB surface, so it can replace some cold rolled products to make some structural parts. There are a few steps in the back, which can save costs for the enterprise, and the surface of the iron oxide scale is removed, it is easier to weld.     Relatively speaking, compared with hot-roll...

    Technical requirements and development trends of steel tubes     (1) The requirements for high corrosion resistance of various corrosive media and high-temperature strength and low-temperature toughness are becoming higher and higher. As a result, the chemical composition of pipe products is constantly changing, and the smelting and processing technology is continuously improved.     (2) The pipe product size (wall thickness accuracy), shape accuracy to promote the online detection, automatic control technology continues to progress.     (3) The requirement of reducing the cost of pipe products makes the production process develop to the direction of short process and near final molding.     (4) The general trend of pipe product requirements is high quality, cheap, efficient, low consumption.     Hot rolled seamless steel tube production     Production process of automatic tube rolling unit: (cold cent...

    The manufacturing process of flange mainly is divided into forging, casting, cutting and rolling.     The casting and forging flanges have advantages that the blanks of them have accurate shape, size and low costs and only need simple process. But forging flanges have manufacturing defects such as blowholes, cracks, etc and have not very smooth internal organization streamline. The obvious advantages of forging flanges are that they can be forged in various shapes and they have low costs.     Forging flanges generally have lower carbon content than the casting flanges and are not easy to rust. They have smooth streamline, uniform internal organization, and better mechanical performance than that of casting flanges. There are no defects, such as blowholes and cracks existing in the casting flanges. Forging flanges are able to withstand higher shear and drawing forces than casting flanges. However, if adopting improper forging process, it will also ca...

    1. Assembly-type planning, convenient and simple installation. Four-layer anti-corrosion treatment, more than 20 years of service life, useful to deal with the surface corrosion, powdering, cracking and other problems that have plagued protective products for a long time, triple stereo maintenance, comprehensive Protection.     2. Outstanding decoration, rich colors, satisfying the individual needs of different customers for protective products. Environmentally friendly and environmentally friendly. Addressed the problem of common products contaminating buildings.     3. Outstanding flexibility, the rigidity and flexibility of high-quality steel make the protection products have better impact resistance. The electrostatic sprayed surface makes the protective product have an excellent self-cleaning function. It can shine as new as rain scouring and water spraying, with super strong adhesion and special impact resistance.     4. Safety bol...

    1. The stainless steel pipe standards in most countries, especially the European unified stainless steel pipe standards, stipulate that all stainless steel seamless steel pipes must be supplied in a solid solution or annealed state to eliminate performance damage caused by cold working and welding.     2. Three key parameters should be paid attention to during solution treatment: heating temperature, rapid cooling method and high temperature residence time. Excessively high solution treatment temperature or residence time will be detrimental to the corrosion resistance of the material. To determine whether the solid solution is in place, the hardness measurement, flaring, crimping, flattening, and tensile data can be determined, and the hardness measurement is the easiest.     3. Due to solid solution or annealing due to high temperature heating and pickling treatment, the manufacturing cost and production cycle are significantly increased. In addit...