TPT November 2007

P roduction of H eat T ransfer T ubing

Nuclear tube capability from power generation specialist

The scope of Sandvik’s specialist manufacturing capability for steel tubes for the power generation industry has resulted in a major order for the British Nuclear Fuels reprocessing plant at Sellafield, UK. The order is for high purity, 18/10/L, nitric acid grade stainless steel tubes in a range of sizes from ½" to 6" nominal bore for a heat exchanger type application. Key to obtaining the order was Sandvik’s track record in producing tubes for nuclear use and its total control of the manufacturing process, from steel melt to the finished product. Steel is specially melted for nuclear applications to ensure its high purity. Strict quality control and inspection routines are followed at every stage of the tube manufacturing process. Sandvik’s track record of supplying the nuclear industry extends to over 30 years as one of the world’s leading manufacturers of the steam generator tubes used in nuclear processing. In this time, more than 30,000km of tubes have been produced for nuclear plants in 20 countries around the world. Tube production is undertaken on a mill, specially designed for producing long length U-bent steam generator tubes. This also allows for tube finishing and packing to be completed to the high cleanliness and nuclear tube quality standards demanded by the industry and customer specifications.

› Sandvik’s stainless steel tubes will be used at the British Nuclear Fuels reprocessing plant in Sellafield, UK

Also in Sandvik’s nuclear tube programme are feedwater heater tubes used in the power generation process in both nuclear power and fossil fuel fired stations. Whilst the materials commonly used for this application are copper alloys, carbon steel and type 304 stainless steel, Sandvik’s duplex stainless steel Sandvik SAF 2304, is available as an alternative, offering strength and corrosion resistant advantages. In an application in a fossil fuel fired power station in the USA, Sandvik SAF 2304 tubes have been used successfully as a replacement for carbon material. Because of its higher strength, this has

allowed a tube wall thickness reduction of approximately 40 per cent. In a nuclear power application in Sweden, Sandvik SAF 2304 has again been used successfully to replace carbon tubes, which failed frequently due to steam erosion. Sandvik Materials Technology UK – UK Fax : +44 121 504 5151 Email : sales.smt@sandvik.com Website : www.smt.sandvik.com/uk Sandvik Materials Technology – Sweden Fax : +46 26 25 17 10

Email : sales.smt@sandvik.com Website : www.smt.sandvik.com

Tube & Pipe Nov. 07 · Tube Products Int. Jan 08

Heat-Resistant Stainless Steel Tubes We offer one of the widest ranges in Europe

More than 20 years of Competence

1.4713 TP 409 1.4720 TP 405 1.4724 TP 430 1.4742 TP 446 1.4749 TP 446 1.4762

TP 327 1.4821 TP 309 1.4828 TP 314 1.4841 TP 310s 1.4845 TP 330 1.4864 Alloy 800 1.4876

· S C H E N K · H E A T - R E S I S T A N T T U B E S TP 32/27 1.4877 TP 321 H 1.4878 Alloy 600 2.4816 Alloy 601 2.4851 Alloy 625 2.4856 Alloy 825 2.4858

Our grades:

Schenk Stahl GmbH P.O. Box 27 03 38, D-40526 Düsseldorf, Germany Tel: +49 2131 230-37, Fax: +49 2131 230-35 info@schenk-stahl.de, www.schenk-stahl.de

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N ovember /D ecember 2007