TPT-January-2015

Technology News

Installation of brazing machine THERMO King, a specialist in transport temperature control systems for trucks and trailers, has installed an automatic brazing machine from EFD Induction. The machine is employed to braze vibration absorbers, components used in the suction lines of air conditioning and refrigeration systems. means we have considerable after- sales support on our doorstep.” The Thermo King machine features a ‘separable’ coil design. “This use of separable coils was decisive in winning the Thermo King order,” said Bjørn Røsvik of EFD Induction. “Indeed, it was essential for the whole automation process, making it possible to go from manual brazing to a fully automated, continuous production flow.”

Commenting on why EFD Induction was chosen over alternative offerings, Michael Corcoran, project manager of Thermo King Ireland, said, “We examined various proposals before opting for the EFD Induction solution. There were several reasons behind the choice of supplier for this critical piece of equipment. First, their solution made technical and economic sense. Second, the company has deep expertise in the brazing field – especially in custom- engineered solutions such as this machine. And third, the fact that EFD Induction is present throughout Europe

The Thermo King brazing machine is powered by an EFD Induction Sinac 18/25 generator. The Sinac model is a ‘Twin’ version with two independent power outputs, each with a split transformer function, making it possible to install separable coils. The full system delivered to Thermo King includes an automatic handling solution, a power source and a chiller unit. EFD Induction has manufacturing plants, workshops and service centres

Customised brazing solutions

in the Americas, Europe and Asia, with corporate headquarters in Norway.

EFD Induction AS – Norway Email: sales@no.efdgroup.net Website: www.efd-induction.com

Clamshell pipe cold cutter DWT has enlarged the product range of its pipe cold cutter up to 72". The clamshell pipe cold cutter has been developed for high metal removal rate, a large adjustment range and an easy setup in-situ. The portable clamshell pipe cold cutter machine for pipe cutting and bevelling avoids heat-affected zone (HAZ) in the pipe cutting process. DLW-HD clamshell cutter is able to operate safely and precisely in most critical applications. A rigid frame construction in combination with high quality steel pinion gear and bearings provide a rugged combination for challenging work. Designed for heavy wall pipes in heavy-duty applications, the high working speed and quick set up provide fast operation on-site. The DWT GmbH – Germany Email: info@dwt-gmbh.de Website: www.dwt-gmbh.de Detecting defects in copper tube Features include cold cutters with split-frame technology for endless tubes; compact dimensions for use in confined work spaces with limited access; quick and safe clamping and adjustment for pipeline welding; and rigid pipe cold cutter for pipeline welding. The application range of the DLW-HD is for cold cutting of pipe from 48" to 72" OD, and for wall thickness up to 100mm. The split-frame cutters can be mounted on assembled stretches of pipe. Special applications such as remote control are available for limited access in pipeline welding.

A stable DC magnetic field is created and, in its presence, a magnetic particle on or within the non-ferrous product passing through the test coil will have the effect of distorting this magnetic field. The distortion induces a signal that is detected by the Multimac electronics, analysed and displayed on the monitor.

continuous casting. In other cases, such as finned tube, the inclusions develop during the manufacturing process, where small particles of metal such as tungsten can break off from fabricating tools and become imbedded in the OD or even through the wall. The MID option uses principles of flux leakage technology. A magnetic dual- coil test sensor consisting of one primary winding, associated with a secondary arranged in differential mode, and one single absolute winding for detecting metallic inclusions, is used.

A FREQUENT problem for copper tube producers is the presence of foreign metallic inclusions, which can lead to failures, particularly in fluid transmission applications. Magnetic Analysis Corp’s eddy current Multimac ® tester with an additional magnetic inclusion detector (MID) absolute channel provides a convenient, reliable solution that can detect inclusions as small as 3mg. In many cases, the inclusion can come from the material itself, which may contain residual impurities from

Magnetic Analysis Corp – USA Fax: +1 914 703 3790 Email: info@mac-ndt.com Website: www.mac-ndt.com

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J anuary 2015