TPi April 2008

developments products &

Photo – Osborn Tubes see page 20

Brück is a manufacturer of seamless rolled rings up to 5,400mm outer diameter and forgings up to 4,000mm outer diameter, with maximum weight of 27 tons, to national and international standards in more than 1,000 material grades, including low-high alloy steel, carbon steel, stainless steel, super- duplex, nickel alloys, titanium and aluminium. The company has a production capacity of approximately 200 tons/day, with four forging-presses and five ring-rollers. The company is EN ISO 9001:2000 and Pressure Equipment Directive PED 97/23/EC annex 1 part 4.3 certified, and also has the Framatome approval for Nuclear Facilities. From the end of 2008 the company will have a new 8,000 ton forging press, which will increase its production ability to 40/50 ton forgings and rings. Seamless rolled rings and forgings

Narrow tolerance tube production

G Rau GmbH & Co KG is a specialist in innovative metal solutions, and a preferred supplier to renowned com- panies active in various fields of electrical engineering, the automotive supplier industry, and measurement and control engineering. The company’s subsidiary, Euroflex, which was founded in 1993, is a leader in semi-finished products in the field of medical engineering. The company specialises in the production of high precision semi- finished products made from precious metals, stainless steels, special alloys and composite materials, as well as in the production of parts and assemblies. The company offers tubes from stainless steels 1.4301 304, 1.4571 316 Ti, and 1.4441 316 LVM (surgical implants), with a seamless or welded finish, as well as all common austenitic alloys, depending on the quantity purchased. The outer diameter dimensions range from 0.5 to 12mm (in exceptional cases up to 20mm, wall thickness > 0.3mm), with a wall thickness range of 0.04 to 0.30mm, depending on the ratio of outer diameter to wall thickness.

The tolerance requirements for stainless steel tubes are continually increasing.

As most seamless stainless steel precision tubes are manufactured by drawing processes, there are natural limits to the attainable dimension accuracy. This becomes especially apparent when tubes with larger outer diameters relative to the wall thickness are manufactured. In response to the increased demand for large, thin-walled stainless steel tubes with narrow tolerances, G Rau has developed a new procedure that enables the production of such tubes: for OD ranges from 0.5 to 8mm, ±0.02mm tolerance; OD 8 to 12mm, ±0.03mm; wall thickness ±5% standard, minimum ±0.01mm. Other tolerances are available on request. The company’s stainless steel tubes are available in soft, hard or special strength conditions, usually in lengths of 3-4m, or fixed lengths according to customer specification. G Rau GmbH & Co KG – Germany info@rau-pforzheim.de www.rau-pforzheim.de

Brück – Netherlands p.attasio@bruck.nl www.bruck.nl

18

Tube Products International April 2008

www.read-tpi.com