Electric Fusion Welding (EFW steel pipe) refers to an electron beam welding, the use of high-speed movement of the electron beam directed impact kinetic energy is converted to heat the workpiece so that the workpiece leaving the melt, the formation of the weld.
It is mainly used for welding dissimilar steel welding sheet or which high power density, metal weldment can rapidly heated to high temperatures, which can melt any refractory metals and alloys. Deep penetration welding fast, heat-affected zone is extremely small, so small performance impact on the joints, the joint almost no distortion. But it has a requirement on a special welding room because welding using X-rays.
Electric Resistance Welding (ERW steel pipe): welding member combination is applying pressure through the electrodes, the use of current through the joint area of the contact surface and the adjacent heat generating resistance welding process method, Also known as contact welding. It has excellent toughness and dynamic load strength, welding deformation.
Commonly used spot welding, seam welding and butt three.
Related information of weld steel pipes:
- ASTM A53 Standard Specifications
- ASTM A252-89 Standard specification
- Welded pipe Manufacturing Processes
- Electric resistance welding at a glance
- Difference between ERW, SSAW, LSAW
- What is welding steel tube?
- Spiral welded steel pipe
- Type of anti-corrosion steel pipe
- The Purpose Guidance Of Welded Steel Pipe
- IPN8710 Water pipe inner wall
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Q&A
How is ERW pipe made?
Electric resistance welded (ERW) pipe is made from steel coil and the weld seam runs parallel to the pipe. The width of the coil is the same as the circumference of the pipe so diameters are limited to 24 inches.
What is ERW steel pipe?
ERW steel pipe is manufactured through low or high frequency resistances Electric Resistance. Welding seam is in longitudinal. During the ERW pipe welding processes, the electric current will make the heat when flow through the contact surface of the welding area.
What's the difference between ERW pipes and seamless pipes?
The biggest visible difference between ERW pipes and seamless pipes in structure is that ERW pipe has a welding seam which is produced by the welding process while seamless pipe doesn't. The less recognizable the welding line is, the better ERW pipe will be.
How is steel pipe made?
Steel is made up of primarily iron. Other metals that may be present in the alloy include aluminum, manganese, titanium, tungsten, vanadium, and zirconium. Some finishing materials are sometimes used during production.
