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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 -
Inspecting of seamless steel pipe
Ultrasonic testing for steel quality inspection includes detection of defects in ultrasonic testing purposes and to measure the relevant dimensions for the purpose of ultrasound measurements. The former is widely used, both automated testing, there is manual testing; while the latter applications...Read more -
High pressure boiler tube pickling and phosphating process
High pressure boiler tube chemical degreasing 1) chemical degreasing take the way of tank soak, in addition to the oil sump with steel production, the inner wall of the shop PVC or polyethylene. 2) Use of nitric acid of 12 to 15% (by volume) chemical degreasing treatment, a temperature of 40 ° ...Read more -
ERW Steel Pipe and LSAW Steel Pipe
ERW steel pipe stand for Electric Resistance welded steel pipe. ERW steel pipes are used in various engineering purposes and Agricultural purposes. The standard of ERW structural steel pipes are limit, only high-quality, low-carbon steel is used. High performances of ERW steel pipes bring many ad...Read more -
Electrode for resistance welding
Resistance welding spot welding, seam welding, projection welding and butt welding all need to use the consumable electrode, although the shape of the electrodes are not identical, however, which is used to weld a transmission welding current and welding stress in the welding process. Some weldin...Read more