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Double roll welded pipe
Double roll welded pipe is made of copper plated steel strip by the unique and copper brazing technology of rolling production for a high precision steel tubes. It is plated with a layer of soldering material than steel with low melting point (generally for copper strip), after cold bending formi...Read more -
Difference between galvanized pipe and seamless pipe
Galvanized pipe is protected by zinc, so it is not easy to rust, galvanized steel pipe is lighter than seamless steel pipe, if it is used in the balcony, the best light with galvanized pipe, because seamless steel pipe is heavy with thick wall thickness, and the cost of seamless steel pipe is hig...Read more -
HFW pipe straightness
Straightness is a measure of HFW (high frequency welding) An important indicator of the quality of steel. The higher the straightness, the easier it is to ensure the quality of the oil well pipe thread, but also for the subsequent processing and testing facilitated. In the production, the causes ...Read more -
Galvanized pipe process characteristics
Galvanized pipe process characteristics 1 zinc sulfate optimization Zinc sulfate biggest advantage is the current efficiency of up to 100%, the deposition rate, which is the other galvanizing process unparalleled. As the crystalline coating is not detailed enough, dispersing ability and poor thr...Read more -
Expanding machine
Expanding machine is straight seam welded metal shaping apparatus, it is bulged cone head, in the steel pipe dilatation, to eliminate the molding pressure and welded steel pipe stress, and to ensure that the full-length straight seam welded steel pipe diameter segment really the same size, equipm...Read more -
ERW steel pipe in API 5L PSL2
Hunan Great Steel pipe can produce you with Electric Resistance Welded (ERW) Pipe suitable for your project needs. ERW pipe cold formed from a ribbon of steel pulled through a series of rollers and formed into a tube which is fused through a electric charge. Common sizes for ERW Steel Pipe range ...Read more -
Electrical resistance welding
Electrical resistance welding will be welders parts formed pressed between two electrodes, and subjected to current, the resistor thermal effects generated by the current flowing through contact with the workpiece surface and the neighboring regions to be heated to melt the plastic state, so that...Read more -
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