LSAW Steel Pipe

    What are the ways to avoid wear on seamless steel tubes?     1. Seamless steel tube packaging should be able to prevent slackness and damage during normal loading, unloading, transportation and storage.     2. If the purchaser has special requirements for the packaging materials and packaging methods of the seamless steel pipe, it shall be specified in the contract; if not specified, the packaging materials and packaging methods are available to the supplier.     3. Packaging materials should conform to relevant rules. If no packaging information is required, it should be suitable for the intended use to prevent waste and environmental purification.     4. If the customer requires that the seamless steel pipe cannot be damaged on the surface, such as bumps, etc., you can consider the maintenance and installation between the seamless steel pipes. Maintenance and installation can use rubber, straw rope, fiber cloth, plastic, pi...

    When the whole or more than half of the steel tube blanks show misalignment, it is usually because:     1. The opening seam is not adjusted properly;     2. The seam pressure roller is not adjusted properly and there is no rounding;     3. The edge is not pre-bent in place.     When the head or tail of the billet shows misalignment, it is usually because:     1. The orientation of the import and export rollers is wrong;     2. The ring frame is wrong;     3. The seam pressure roller is not well rounded, and the orientation error of a single pressure roller;     4. The molding is not good, and the difference between the two ends of the formed tube blank is large;     5. The slit width of the opening is above 150mm;     6. The pressure of the hydraulic system fluctuates.

    High frequency straight seam welded pipe (ERW) is the hot rolled coil plate formed by the forming machine, using the skin effect and proximity effect of high frequency current to heat and melt the edge of the tube blank, and pressure welding under the action of the squeeze roller To achieve production. The high-frequency resistance welding method was applied to the production of welded pipes in the 1950s. In the past ten years, its production technology has become more and more perfect, and product quality has been continuously improved. The first is that the quality of raw materials used in ERW production has been significantly improved. Low C, low P, S in the design of steel components, microalloying; converter smelting, ladle refining, vacuum degassing, continuous casting and other new technologies in the smelting process The use of controlled rolling and controlled cooling technology in the rolling process has greatly improved the appearance size, appearance quality, a...

    The damage to the wellbore structure of oil fields and water wells not only affects the normal production of damaged wells, but also affects the normal development of adjacent wells and even blocks, and poses a great threat to the stable production of the entire oil field.     Oil well casing cathodic protection technology:     There are two types of cathodic protection technology: sacrificial anode cathodic protection and forced current (impressed current) cathodic protection.     Sacrificial anode cathodic protection technology:     Sacrificial anode cathodic protection technology is to use a metal or alloy with a potential that is more negative than the metal to be protected to electrically connect with the protected metal, relying on the current generated by the metal with a more negative potential to continuously corrode and dissolve to protect other metal.     As a sacrificial anode material, it must meet th...

    During the processing of seamless steel pipe manufacturers, there are many steps to obtain such high-quality pipes. By eliminating the work hardening of seamless steel tubes, a satisfactory metallurgical structure can be obtained. The process equipment is a bright annealing furnace, which is mainly used. Heat treatment of the finished stainless steel in a protective atmosphere. When the application performance requirements of seamless steel tubes are different, the requirements of the metallographic structure after bright annealing are also different, so the process of bright heat treatment will be different.     After cold working, the residual stress of the seamless steel pipe material remains, and the residual stress is very detrimental to the stress corrosion cracking of the pipeline. Any degree of cold working will result in a significant increase in the material's resistance to stress corrosion cracking. The degree of cold working will also adversely affe...