steel tube

    Hot-rolled seamless steel pipe production is one of the important processes, the rational development of its process plan or not, a direct impact on the size of the steel pipe after rolling the surface of the precision and quality,     Unreasonable process plan will cause the inner surface of the steel pipe to produce the defects such as folding, crack and concave.     N80Q steel casing is a standard oil casing commonly used in oil (for the seamless steel pipe), the standard provisions of the finished pipe heat treatment process for quenching and tempering.     N80Q casing production process is as follows: furnace refining → continuous casting → annular furnace → perforation → continuous rolling → stepping furnace → sizing → sawing → tempering treatment → straightening → physical and chemical testing → testing → thread processing → Coupling tight → water pressure test → measuring length weighing, marking → packaging storage. The billet ...

    The heat treatment after welding is a new technique to eliminate residual stress. Preheating the material to the post-heat treatment temperature before welding and welding of the workpiece continued to keep the heating temperature, the use of insulation after the completion of the insulation of cotton to its slow cooling. This method can effectively reduce the welding residual stress and improve the stress corrosion resistance of metal.     After welding heat treatment can effectively reduce the welding residual stress, and the higher the heat treatment temperature, the better the residual stress elimination effect. The heat treatment of large diameter lsaw steel pipe can effectively improve the stress corrosion resistance of large diameter steel pipe. The higher the temperature of post-heat treatment, the more remarkable the stress corrosion resistance is. Diffusion method Metal carbide coating technology is the workpiece placed in special media, the prolifer...

    In order to detect the transverse or longitudinal defect of the weld of LSAW longitudinal seam, ultrasonic testing was carried out by jet (water column) coupling. Jet (water column) ultrasonic flaw detection is the probe and the pipe through the jet coupling between the probe issued by the longitudinal wave beam through the water or steel interface into the steel pipe, through the waveform conversion of the steel pipe welds pure shear wave detection.     Therefore, the realization of the weld in the pure shear wave detection, the probe angle of incidence must be between the critical angle and the critical angle between the II, can be derived from the law of refraction. The critical angles of the first and second critical angles of incident longitudinal waves from the water to steel are calculated to be 14.5 °and 27.3 °, respectively.     Longitudinal welded pipe Ultrasonic Inspection: Nondestructive testing is on-site testing, fast and non-destructi...

    Standard would be an important factor for customers when they choose steel pipe no matter seamless steel pipe, or welded steel pipe. And for every order, we'll provide a MTC to you before delivery.     Here is it:     ASTM A252 LSAW steel pipe-Fluid Transportation Pipes:     Additions:     Thickness: 6-60MM     Size: 310-1420mm     Material: Q195,Q215,Q235,Q345(B,C,D,E)     Certification: API ABS CE     ASTM A671 / A672 CL10-CL13-Fluid Transportation Pipes:     Out Diameter: 323.9mm -1820mm(12''-72'')     Wall Thickness:5.0 - 50mm     Length:6 – 12m     ASTM A53 LSAW steel pipe-Fluid Transportation Pipes:     Out Diameter: 323.9mm -1820mm(12''-72'')     Wall Thickness:5.0-50mm     Length:6–12m     ASTM A179, ASTM A192, ASTM A210 of Seamless Steel Pipe-Carbon Steel Pipe:   ...

    Seamless stainless steel pipes are the preferred choice for high-temperature applications across industries due to their several superior properties. They possess greater strength under loading, exhibit exceptional corrosion resistance, can withstand shocks and vibrations, and offer reliable performance even under the toughest and harsh conditions. Due to these benefits, seamless stainless steel tubes and pipes are used in heating-pipelines, containers, coal-saving devices, super-heaters and repeaters, high press boiler, heat exchanger and condenser tubes, mechanical and structural tubing, among several others. This post discusses the various material grades of stainless steel used for producing these seamless pipes and tubes.     Grades of Stainless Steel Used in Producing Seamless Tubes and Pipes     Steel tubes and pipes used for the high-temperature applications must be of superior quality to resist high temperatures ranging from 400 degree Cels...

    Steel tube is used in a variety of structural and industrial applications, such as automobile transport, architecture, and construction. These steel tubes are made of different steel structures, from stainless steel, carbon, zinc or soft steel, depending on the application requirements.     Steel tubing is divided into two classes: mechanical and structural, depending on its design. So what is the difference between mechanical and structural steel tube? Below are some points to consider while differentiating the two types of steel tubing. The comparison is made on the basis of application, specification, and shape.     Comparison between mechanical and structural steel tube     Application: Mechanical tubing is used in low stress and light gauge structural applications. These applications include conveyor belt components, solar panel supports, greenhouse structures, kitchens and restaurants, hospitals and medical equipment, and various t...

    1. From the spiral steel pipe looks. In appearance is to pay attention to those welded joints, seen the appearance is not a drawback, there is a lack of scale, which can be seen through the naked eye, of course, detailed and bilateral theory, Borrow a standard model, gauge and magnifying glass to view. Because of the appearance of welding defects, which means the spiral pipe inside most likely also flawed, even the appearance of effort are not done, inside the effort is difficult to ensure.     2. View approach is to use equipment to view, that is, without the risk of pipe to borrow the case of ultrasonic flaw detection, ray detection, penetration testing, and magnetic flaw detection method can see the spiral pipe has not see the defects. In addition to the defective view, the intensity of the pressurized container is also viewed. Usually there are two kinds of water pressure test and air pressure test. Such a view is to see the spiral steel pipe weld fineness...