Article collection
A collection of four articles published in the Tube & Pipe Technology magazine.
Weldac: Tube welders
EFD Induction has the most comprehensive range of solutions for the tube and pipe industry. Weldac is a proven solution for welding stainless steel, aluminum, low-carbon steel and high-strength steel and is possibly the world's best induction welder.High-Output Solid-State Induction Welders
- More output: Continuous electronic load matching secures full power output across a wide range of tube sizes.
- More uptime: Short-circuit-proof, safe and reliable operation.
- Unrivalled efficiency: Diode rectifier with a constant power factor of 0.95 at all power levels, and an efficiency factor of 85-87%.
- Eco and energy friendly: High efficiency saves energy and reduces cooling water consumption.
- Easy to operate: An easy-to-use control panel with a minimum of manual settings makes the Weldac extremely easy to operate.
- Wide range of power sizes: From 50 kW up to 2200 kW. A frequency range of 60-500 kHz.
- Modern modular design: The small, compact footprint saves valuable floor-space and simplifies in-line integration. Up to 1100 kW available in a one-cabinet solution.
- Complete system: Consisting of a diode rectifier, inverter modules, output section, busbar and operator control system.
- Unmatched warranty: Five-year warranty on Weldac inverter modules and driver cards.
- Full range of consumables: Coils, ferrite, impeders and tube scarfing equipment.
Learn more about induction welding
A small revolution. Introducing the new Compact Weldac
EFD Induction’s new Compact Weldac isn’t just the most compact solid-state welder on the market, it is also the smartest, most efficient and eco-friendly.
Weldac - High-output, solid-state welders
Weldac is EFD Induction’s family of high-output, solid-state tube and pipe welders. The Weldac family covers a wide range of power sizes; from 50 kW up to 2200 kW. and a frequency range of 60-500 kHz.
Induction welding gallery
This new Compact Weldac measures less than 1300 mm in height, 1500 mm in length and 500 mm in width.
The world’s most compact one-cabinet 300 kw solid-state welder
At only half the size of its predecessor, the new Compact Weldac has a minimal footprint but has lost none of the Weldacs’ well-known power and high efficiency.
TWO-TURN COILS: Virtually the entire busbar on the Compact Weldac is covered to minimize the risk of contaminants entering and building up inside.
Coil changes take only seconds, with the welder adjusting automatically to each tube dimension.
CONTROL PANEL: Operation of the Compact Weldac is via an easy-to-use control panel with recipes that will guide the operator to the correct settings.
The first welder in the world with 1000 kW in a single cabinet solution. EFD Induction has always been at the forefront in developing equipment with the best power-to-volume ratio.
Double cabinet welder. The Weldac family covers a wide range of power sizes—from 50 kW up to 2200 kW.
Coil changes take only seconds, with the frequency adjusting automatically to each tube dimension.
Weldac’s automatic load matching ensures full output power across a wide range of tube sizes. There are no ‘unsafe’ operating areas. When a different- sized coil is fitted, Weldac automatically matches to the best setting.
Automated induction longitudinal welding is a reliable, high-throughput process
Weldac’s efficiency from input at the rectifier to output at the coil is 85-87%.
Weldac can be fitted with various induction coils or with quick-lifting contact heads.
The low power consumption and high efficiency of EFD Induction welding systems reduce costs.
The high-speed throughput and reliability of induction welding makes it perfect for the tube and pipe industry.
Ferrite for high-frequency tube welding
We offer a full range of consumables including coils, ferrite, impeders and tube scarfing equipment.
Articles on induction welding
EXCLUSIVE REPORT - The EFD Induction Weldac
The EFD Induction Weldac: What it is, how it works and why you should care.
Maximising output in high-frequency tube and pipe welding
The authors evaluate the parameters that influence welder performance and scrap production during changeover in the high-frequency tube and pipe welding process.
Maximizing uptime in high-frequency tube and-pipe welding
This article explains some basic principles of solid-state welder design that are crucial for maintaining operation under various conditions.
Consistent quality in high-frequency tube and pipe welding
The authors evaluate the parameters influencing weld quality and scrap production in high-frequency tube and pipe welding. The paper focuses on the welder. Two stages of the production process – steady state operation and non-ideal conditions – are investigated. The parameters involved are ripple in output power and short circuits in the load.
Weld setup, variable frequency and heat affected zones
The article investigates the impact that geometrical changes in the weld zone have on weld frequency and the Heat Affected Zone (HAZ).
