TPT July 2009

W elding: L atest D evelopments & M achinery

Rafter Equipment ships 16" weld box

the greatest flexibility for the customer when selecting the composition of the welding equipment. Particular attention has been paid to new tube to tube sheet MIG/MAG welding equipment, which includes all the advantages of this welding process while guaranteeing high quality and speed of welding. PRAI’s latest development is a tube welding head for welding radiator bends, even if pre- assembled with very low clearances. PRAI Srl – Italy Rafter Equipment Corporation, formed in 1917, manufactures welded-seam tube and pipe mills, roll forming machines, cut-off machines, auxiliary and other related tube and pipe mill machinery. Additional services include rebuilding and upgrading mill equipment. Rafter Equipment Corp – USA Fax : +1 440 572 3703 Email : mprasek@rafterequipment.com Website : www.rafterequipment.com access to the downstream side of the unit for easier inspection, setup, and replacement of the ID weld bead-cutting tools. An integral tandem OD weld bead trimmer and bead winder with powered bundle push- off were also included.

Rafter Equipment Corporation has shipped an RT-9000 five-roll weld squeeze box.

air cooler-Hudson type with filler wire, urea reactors, titanium heat exchanger, multi- pass welding with AVC) as well as for orbital tube to tube welding with open arc welding heads for tube diameters up to 4", with or without filler wire, with or without AVC and torch oscillation. The product range is completed by closed chamber orbital welding heads, used in the food, beverage and pharmaceutical industry. Orbital welding programmers, based on microprocessors, can be adapted to different power supplies thus guaranteeing It will be installed as part of an ERW pipe mill upgrade at a prominent North American facility producing API line pipe up to 16" (400mm) OD. The weld box features powered adjustments with actuators that push on the centreline of the weld squeeze roll tools. This feature eliminates any cantilevered loads and the long-term maintenance consequences of such cantilevered designs. The unit also includes position feedback using linear transducers and a graphical operator interface for more repeatable setups. Additional quick-change features were added to minimise the amount of time and effort necessary to change the roll tooling. The new open design allows for operator

 Rafter’s RT-9000 Weld squeeze box

Orbital welding range

The company PRAI was founded in 1987 in Rome, by technicians with over ten years’ experience in design and manufacturing of orbital welding equipment. All PRAI welding equipment is based on the company’s own designs, applying the experience of different application sectors. Modular design, easy handling and maintenance and reliability are the reasons why clients worldwide choose PRAI orbital welding equipment. PRAI orbital welding equipment covers all requirements in tube to tube sheet applications (eg tube recessed, flush or protruding, with or without filler wire,

Fax : +39 067 232 175 Email : silvia@praisrl.it Website : www.praisrl.it

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