TPT September 2007

T ube M ills: R olling & F orming M ethods

Achieving the best weld on mills with HAZ control

Thermatool, USA, has further developed its new HAZ control technology, which enables the tube mill operator to vary the welding frequency at the operator’s console in 1kHz increments from 150-400kHz. According to the company, this has revolutionized the high frequency welding process. The capabilities of variable frequency HF welding have now been further extended to Thermatool’s HAZ control technology TM . The company claims that, for the first time, an operator will have the information required to consistently make the best weld. The combined effects of weld power, frequency, vee length, impeder function, and wall thickness are now displayed on the operator’s console in a simple way.

This development provides the mill operator with the knowledge of their exact position in the weld process window. Consequently, the operator can easily and repeatedly achieve the optimum weld HAZ. Once the optimum weld HAZ is determined it can also be stored to ensure repeated production of quality products on every tube mill production run. Thermatool Corporation – USA

,,Tube treatment is no art.!“

Fax : +1 203 468 4281 Email : info@ttool.com Website : www.thermatool.com Inductotherm HWT

(Thermatool Europe) – UK Email : info@ihwtech.co.uk Website : www.inductotherm-hwt.co.uk

Mills for heavy walls and high yield strength Rafter Equipment Corp, USA, is a leading supplier of heavy wall and high yield strength tube and pipe mills. These mills are being used for production of pipe and tubing for many demanding applications including oil country tubular goods (OCTG), hollow structural sections, DOM and the medical and automotive industries. Examples of products that can be produced on the company’s mills include Ø 2.375" x 0.440" wall at 75,000psi yield for re-draw use, Ø 12.750" x 0.5" wall at 65,000psi yield

for structural use, and 10" square x 0.5" wall at 55,000psi for structural use. The mills can also be used for 6.625" x 0.322" wall at 75,000psi for OCTG, and Ø 0.625" x 0.083" wall stainless steel at 80,000psi for food grade and medical applications.

In conjunction with the high wall thickness to diameter ratios, these heavy walls demand a robust mill design, engineering expertise and sound manufacturing practices to ensure a reliable process and high product yield. Rafter also designs and builds tube and pipe mill equipment used to produce tubing from carbon steel, stainless steel, titanium, copper, brass and other exotic weldable materials. › Rafter supply mills for heavy wall and high yield strength

Tube preparation is an art.

®

Maschinenbau GmbH Hünegräben 22

D-57392 Schmallenberg Tel +49 (0) 2972 - 97 15 - 0

Rafter Equipment Corporation – USA Fax : +1 440 572 3703 Email : sales@rafterequipment.com Website : www.rafterequipment.com

sales@transfluid.de www.transfluid.de

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S eptember /O ctober 2007