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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 -
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 -
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 -
Difference between Seamless and ERW Stainless steel pipe
What is the Raw material required for manufacturing Seamless & ERW Stainless steel Pipes? Seamless Steel Pipe is made from a solid round steel ‘billet’ which is heated and pushed or pulled over a form until the steel is shaped into a hollow tube. Billets are procured both from indigenous supp...Read more -
Common Welded Steel Pipes
As is known to all, there are many kinds of different welded steel pipes in the world. The welded steel pipes can be divided into many types according to its different material properties, technology of manufacturing and practical uses. In our daily life, the most commonly used welded steel pipes...Read more -
Large diameter spiral pipe submerged arc welding process
Welding way of spiral pipe is submerged arc welding; molding process, before tilting intermittent production; unit speed, 0.5–3m / min; welding speed, 0.5–3m / min. Units from uncoiling machine, straightening machine, on the device, hydraulic shears, milling welder, disc cutter, milli...Read more