TPT November 2013

Technology News

TubeMaster and ScarfMaster saw blades for efficient in-line cutting

PVD coating protects the tips effectively against the high temperatures being developed during the cutting process. In case of ID-scarfing in the tube making process, the internal weld bead, often about 6mm thick solid steel, remains inside the tube. During cut-off this inside wire is caught by the saw, causing a huge peak load usually on one saw tooth. This can easily lead to tooth breakage of the saw blade. Kinkelder started developing a new saw in 2010, which resulted in the conception of ScarfMaster ® . ScarfMaster ® is a carbide-tipped saw blade featuring a very specific tooth geometry while tips themselves are made of a highly shock resistant type of carbide. The teeth are supported by a saw body with extra strong shoulders, which give the combination tooth/ body very high stability and fracture resistance. “Not only is the blade life of the new ScarfMaster ® considerably longer, it can also cut 50 per cent faster,” emphasises Mr Molenaar. “Due to this, line speed can be significantly increased. Also, the line does not have to be shut down as often to change the saw blades, which means better uptime. In all regards, the new ScarfMaster ® saws improve productivity

KINKELDER has developed a smooth cutting TubeMaster ® saw blade for orbital cut-off applications. Its special tooth geometry cuts a large range of thin to thick wall tubes. “Key features of this TubeMaster ® saw blade are a special carbide grade and a high-tech PVD-coating,” said Kinkelder application engineer Leo Molenaar. “This, combined with a special cutting geometry, does not require much force for chip removal, assuring a milled-like finish of the cut surface. This special geometry also reduces vibration when cutting thin wall (<4mm) tubing, thereby achieving an excellent blade life.” This saw blade concept allows use of one set of blades with medium tooth pitch to cut tubes with wall thickness from 3 to 9mm and on some machines even up to 12mm. For wall thickness 9 to 30mm a coarse pitch is defined. TubeMaster ® saw blades are available in diameters from Ø300 to Ø420mm for all types of orbital cutting machines, such as MTM, Otomills, Elmaksan, Kusakabe, Linsinger and SMS. Tubes for oil and gas as well as structural pipes and hollow sections form a primary market for TubeMaster ® saw blades. Even high hardness materials such as X80 can be cut efficiently thanks to the type of carbide used. The

of the tube line and this automatically reduces cost of production per tube length. There is already a rapidly growing number of enthusiastic tube manufacturers all over the world who successfully use ScarfMaster ® saw blades for their tube lines.” ScarfMaster ® saw blades are available in diameters of 400, 450, 500, 560 and 600mm destined for the production of tubes in the diameter range of 2.5" to 7" (63.5 to 168mm). Kinkelder was founded in the Netherlands in 1945 and grew into one of the most important producers of circular saws worldwide with the production and sales of saws. Less than 10 per cent of the production remains in the Netherlands. The rest is designated for export to approximately 70 countries. Outside the Netherlands, Kinkelder now has its own sales and service branches in Germany, the USA, France, Belgium, Czech Republic, UK and China. Kinkelder’s own subsidiaries as well as their experienced worldwide network of engineering distributors have their specialised application engineers available on call.

Kinkelder BV – The Netherlands Website: www.kinkelder.com Tube measurement and testing

be done. So the time required, for example for a heat exchanger which is out of production, can be minimised in any area of cost, which gives the end user a total large financial benefit including a traceable preventive overall maintenance schedule. Tube Testing Europe BV – The Netherlands Email: info@tubetestingeurope.com Website: www.tubetestingeurope.com

wall reduction) among the tube into tube sheet installations according the ASME/DIN international procedures. With modern equipment and a method which has been honoured by theASTM (E2906/E2906M-13) the company can measure, analyse and report any thermal application in an accurate and fast, professional manner. The biggest advantage of this advanced APR method is the short turnaround time needed for a large number of tube measurements to

TUBE Testing Europe BV has extensive experience in the field of performing NDT measurements with its Acoustic Pulse Reflectometry (APR) technology. It recently took over these activities from HPFM BV and so continues many years of experience in this field. HPFM BV was the first company in which this method was applied internationally in 2008 on straight- and U-tube heat exchangers, blade spiral wounded air fin cooling banks, and especially for the AWR (apparent

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N ovember 2013