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EFD Induction is a well-known name in the tube and pipe industry. The excellent reliability, efficiency and robustness of our high frequency, solid-state Weldac tube welders confirm our leading position as a provider of cost-effective, high-uptime systems.

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Some of the areas where we supply solutions are:

Seam annealing of longitudinal tube welds
Full body annealing of both magnetic and non-magnetic tube products
Pre-heating and postheating of various workpieces
Longitudinal seam welding of tubes and pipes in dimensions from OD 3/8”-26”/10 mm – 660 mm
Brazing of heat transfer tubing (boiler, refrigerator and HVAC)
Preheating and stress relieving of OCTG pipe ends
Coating and post-weld heat treatment (PWHT) of oil and gas pipes
Customized solutions for every dimension and alloy type

The EFD Induction subsidiary, EHE Consumables, delivers a comprehensive range of induction coils, impeders, ferrites, scarfing systems and other products for tube welding.

Videos

Induction welding

Induction welding is used in the tube and pipe industry for the longitudinal welding of stainless steel (magnetic and non-magnetic), aluminum, low-carbon and high-strength low-alloy (HSLA) steels and many other conductive materials.

Seam normalizing

In-line seam normalizing systems from EFD Induction—a proven way to meet oil and gas pipe standards.

Images

Tube and pipe welding with induction heating

Automated induction longitudinal welding is a reliable, high-throughput process

Induction heating for tube and pipe welding

The high-speed throughput and reliability of induction welding makes it perfect for the tube and pipe industry.

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.

Advanced seam normalizing. For advanced alloys and pipe.

EFD Induction seam normalizing systems are easy to control. They are specially designed to work with EFD Induction power sources, coils and handling mechanisms.

One of our horizontal tracking seam normalizing systems. The induction coils are positioned above the pipe, and track the seam with the help of a specially designed tracking camera.

Brazing of a copper tube to an aluminium heat with induction heating

Brazing of a copper tube to an aluminium heat exchanger. Note the automatic filler material feeder.

Brazing of a heat exchanger with induction heating

Induction brazing of a heat exchanger.

Brazing heat distributor with induction heating

Induction brazing of heat distributors.

Brazing of heat distributors with induction heating

Induction brazing of heat distributors.

Technical Articles

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.

New high-frequency converter for induction heating

This paper presents a new high-frequency-converter for induction heating. The converter has a diode rectifier and automatic matching.

Weld setup, variable frequency and heat affected zones in high frequency tube and pipe welding

The article investigates the impact that geometrical changes in the weld zone have on weld frequency and the Heat Affected Zone (HAZ).

News

Marcegaglia UK Ltd reports excellent performance from EFD Induction WELDAC

In August 2017, Marcegaglia UK installed a new EFD Induction 400kW WELDAC high frequency tube welding system on the largest pipe mill at their UK Dudley plant.

Tata Steel invests in EFD Induction Weldacs across European plants

The excellent reliability, efficiency and robustness of the EFD Induction Weldacs make these solid-state tube welders a solid investment indeed.

Introducing SiC transistors

“After comprehensive testing of a range of different types of transistors, EFD Induction is now ready to introduce Silicon Carbide transistors in some of our high frequency, solid-state welders”, says Global Sales Director for Tube and Pipe, Peter Runeborg.

Welder upgrade improves total harmonic distortion

EFD Induction has announced that its lower-power Weldac welders will feature an option for a 12-pulse diode rectifier.

Major European pipe maker orders 750 kW ‘Weldac’

One of the largest tube and pipe manufacturers in Europe has selected EFD Induction to design, build and install a single-cabinet 750 kW / 200 kHz ‘Weldac’welder.

Weldac impresses at Chinese event

Dozens of high-level representatives from China’s tube and pipe industry recently attended a special technical seminar hosted by EFD Induction in Shanghai.

Three ways to cool down

When producing welded pipes according to API specification or similar, the weld and the heat affected zone (HAZ) have to be normalized. EFD Induction has three solutions.

Declaration of Independence

Independence Tube Corporation (ITC) is one of North America’s leading manufacturers of square and rectangular structural steel tubing.

Big machine, big success

Shanghai-based Baoshan Iron & Steel Company Ltd. is China’s largest iron and steel manufacturer. The recent installation of an IGBT-based Weldac and two seam annealing machines enables them to produce a complete range of tubes.

EFD Induction Weldac chosen for 16 inch mill

For SSAB Europe, the key factors for choosing an EFD Induction tube welder were smaller footprint, new advanced technology with a five-year guarantee on inverter modules and a high-power factor at any welder power level.

Tube and pipe