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Hot extrusion technology
Hot extrusion technology is a metal above the recrystallization temperature for extrusion, the billets extruded from a die orifice, to obtain the shape of the die hole metal forming method of the cross-sectional pipe. In the hot extrusion process (from the tube blank to the blank pipe), the tube ...Read more -
High-frequency induction welded (HFI) pipe
High-frequency induction welded pipe production speed is high, the welding process is stable, good quality, has been widely used in welded pipe production. There are many factors affecting the quality of weld in the process of production, to obtain ideal welding effect, strip width, molding proce...Read more -
High Frequency Welding
High frequency welding is the effect of skin effect and the adjacent high frequency current generated by the use of the butt plate and other metal materials up new welding process. Emergence of high frequency welding technology and mature, directly contributed to the development of Longitudinal h...Read more -
Glass steel pipe and ordinary steel pipe comparative analysis
Steel pipe is a traditional pipe by spiral wound steel plate welded into a cylindrical post. From the strength and stiffness of view, sand glass pipe and ordinary steel pipe have excellent characteristics. But in terms of corrosion resistance and service life, hydraulic characteristics, energy, w...Read more -
Galvanized pipe pretreatment
Process: degreasing → flow cleaning → conditioning → phosphating → washing → drying. Non galvanized pipe process Degreasing rust → washing → neutralization flow → conditioning → phosphating → washing → drying. First, the oil pool management In strict accordance with the ratio of 1:20, that is 1 k...Read more -
Heat preservation method of making the spiral steel pipe
Spiral pipe insulation pipe methods wherein a process starting from the pipe wall as inhibition plus anti-corrosion coating, loop resistance can be increased, reducing the corrosion current;. External DC power supply, the steel pipe to soil caused negative potential to form a cathode protection, ...Read more -
ERW pipe weld joint
The most important feature is that no foreign ERW weld filler metal, heating speed, high production efficiency. This is its advantages, but also its shortcomings. No filler metal, the filler alloy can not benefit approach elements improve weld properties; heating temperature is high, when the sou...Read more -
Difference between pipeline welding and TIG welding backing
Full TIG welding backing makes no difference in the process, the whole arc for thin-walled small diameter pipes (DN50 general and below, the wall thickness of 4 mm) or less, the purpose of guarantee good weld root quality appearance imaging. When a large diameter, thick wall thickness should be u...Read more -
Degaussing pipes
Residual magnetism causes and impact on quality of welding in the construction and repair of gas pipelines welding job, sometimes magnetic blow phenomena affect the welding process. Forming a magnetic blow is the result of the presence of residual magnetism of the tube metal. Typically, magnetic ...Read more -
Continuous annealing
Continuous annealing is a relative terms batch annealing, continuous annealing of the strip through a continuous annealing furnace, annealing furnace without sealing strip without staying directly coiling of production. In production applications, the continuous annealing wide application, contin...Read more -
Hot rolled seamless steel pipe
Hot-rolled seamless steel pipe: hot rolled is relative to the cold-rolled, cold rolling is below the recrystallization temperature of the rolling, and hot rolled is carried out at above the recrystallization temperature of the rolling. Advantages: hot rollded seamless steel pipe can damage the ca...Read more -
ERW oil casing application and market analysis
In the field of oil drilling and oil well, high-frequency electric resistance welded casing (referred to as ERW casing) compared with seamless casing is high dimensional accuracy, weld toughness, anti-extrusion of high-performance, and low cost advantages, which has been widely used in foreign co...Read more