TPi May 2015

Stainless steel tubes

New markets for stainless steel finned tube heat exchangers

of successful companies. He has also developed and patented eight related products. Mr Pierce’s original patented linear motor Elfin finning machine is capable of mechanically bonding any two metals. This produces an interference, swaged fit between fins and tubes to form a durable matrix, which extends the surface area of the tubes to dissipate heat or cooling more rapidly, without deformation of the base tubes. Infinity, the latest Power Fin machine technology, uses the same process but positions multiple fins at once. They are claimed to be the only machines that can join any two metals with precision, using a clean, green process.

Heat exchangers are used in many industries, including the emerging markets of fuel cell, waste heat recovery and micro power generation – all projected to be multi-million pound worldwide markets in the near future. With specific requirements to deal with corrosive condensates and high temperatures, the use of stainless steel fins on stainless steel round or elliptical tubes, including 5mm small bore, challenges traditional matrix manufacturing methods, to reach required heat transfer requirements. Power Fin Technologies is a UK-based exporter of finned tubes and finning machines. David Pierce, the company’s owner and sole director, has been in the heat transfer industry for over 40 years, and in that time he has bought, managed and sold a number

walled, or micro bore tubes of 5mm or smaller diameter. As the interference fit is achieved by the fin, all sizes and specifications can be accommodated with ease. The precision of manufacture also produces heat exchanger cores of consistent performance.

Power Fin Technologies – UK info@powerfin.co.uk www.powerfin.co.uk

Stainless steel tubes are difficult to fin, especially if they are elliptical, thick

The value of seamless stainless steel tubing HandyTube Corporation, part of the tubing division of Handy & Harman, is a manufacturer of seamless coil and straight tubing for oil and gas, petrochemical and healthcare markets. (0.02" to 1"). HandyTube’s seamless coil and straight length tubing is available in multiple sizes, compatible with standard fittings, and can be customised for specific applications. Tubing is available in many corrosion-resistant, high- temperature and high-strength alloys. resulting in high-quality seamless coil tubing of various lengths and diameters. The products are available in a variety of high-performance, corrosion-resistant alloys and sizes suitable for challenging environments. The precision materials division, added in 2006, broadened the company’s capabilities to include smaller diameter tubes, enabling HandyTube to manufacture capillary and transport tubing ranging from 0.51 to 25.4mm OD HandyTube Corp – USA sales@handytube.com www.handytube.com The company’s products are created from hollow extruded tubes that are passed through a process-intensive manufacturing environment of drawing, cleaning and vacuum furnace annealing,

Steel pipes and fittings Hebei Senhai Pipeline Co, Ltd is a manufacturer and exporter of steel pipes and fittings. The company is located in Cangzhou City, China, about 120km from Tianjin seaport and airport, and 180km from Beijing.

and double FBE layer anti-corrosion; internal wall anti-drag coating of line pipe; polyurethane insulating pipe; and anti-corrosion by adding cement-and- sand layer. Steel butt-welding pipe fittings range in size from ½" to 72". Hebei Senhai Pipeline Co, Ltd – China sales@senhaipipeline.com www.senhaipipeline.com

pipes. Seamless steel pipes range in size from 21.3 to 660mm, and 2 to 50mm wall thickness. Square hollow sections and rectangular hollow sections are available from OD 20 x 20mm to 600 x 600mm, in wall thicknesses from 0.8 to 50mm. Anti- corrosion of steel pipes includes 3PE and 3PP outer anti-corrosion layer; single

The company produces large diameter, thick wall steel pipes by ERW, SSAW and LSAW, and various anti-corrosion

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May 2015 Tube Products International