Introduction of anti-corrosion on the inner wall of large-diameter steel pipes:1. Before processing all steel pipes, the steel plate on the inner wall side of the large-diameter steel pipe shall be derusted until the metal is exposed to metallic luster (whitening). It should meet the sa2.5 standard

The length of steel pipes used for pipelines, but for the convenience of users, when the steel pipes sold at any time are reserved for production, the Q235A spiral steel pipes are produced within the specified length of the steel pipes, but when the actual order is made, the steel pipes of standard

To solve the problem of excessive misalignment in the alignment of spiral steel pipe nozzles, the following preventive measures should be taken in quality management control:1. Try to use the internal alignment device.2. Do a good job in engineering measurement and trimming when assembling.3. When t

(1) During the extrusion process, the temperature of the inner lining of the spiral steel pipe increases continuously with the extrusion process. At the end of the extrusion, the temperature of the inner wall of the inner lining near the extrusion die is higher, reaching 631 °C. The temperature of t

1. Impact toughness of large-diameter steel pipe: The load acting on the machine part at a high speed is called impact load, and the ability of the metal to resist damage under the action of impact load is called impact toughness.2. Strength of large-diameter steel pipe: Strength refers to the perfo

Thin-wall stainless steel pipe socket argon arc welding construction method has the following characteristics:1. The welding process does not require welding consumables (replaced by the expanded pipe edge). The steel pipe is inserted into the pipe fitting socket. The socket end is welded in a circl

1. The use of large-diameter stainless steel pipe can be divided into oil well pipes (casing pipes, oil pipes and drill pipes, etc.), pipeline pipes, boiler pipes, mechanical structure pipes, hydraulic prop pipes, gas cylinder pipes, geological pipes, chemical pipes (high-pressure chemical fertilize

Steel pipe anti-corrosion methods generally use coating anti-corrosion. Coating anti-corrosion is to apply coating uniformly and densely on the surface of the rusted metal pipe to isolate it from various corrosive media.1. Anti-corrosion coating on the outer wall of steel pipeThe anti-corrosion of t

Large-diameter straight seam welded pipe is a general name, which is produced by steel strips, and the pipes welded by high-frequency welding equipment are called straight seam welded pipes. (It gets its name because the welding of the steel pipe is in a straight line). Among them, according to diff

1. During the forming process of double-sided submerged arc welded spiral steel pipe, the steel plate is uniformly deformed, the residual stress is small, and the surface is not scratched. The processed steel pipe has greater flexibility in diameter and wall thickness within the steel pipe size spec