Super Duplex tubes for the most corrosive environments

With demand for energy increasing, oil and gas exploration is continuously moving into tougher environments. Energy companies are now exploring and producing in much more corrosive conditions causing increased demands on the material tubing used in the extraction process.

As a leading supplier of high performance tubing, control lines and umbilicals for the oil and gas sector, Fine Tubes recently invested in new manufacturing equipment and NDT equipment to produce Duplex and Super Duplex tubes in seam welded, cold redrawn and annealed tube product form.

Super Duplex alloy 2507 and Duplex alloy 2205 have combined high mechanical strength and excellent seawater corrosion resistance for use in some of the most demanding oil and gas, chemical process, desalination and geothermal power applications.

Fine Tubes cold work and anneal the seam welded tube to improve the homogeneity of the seam welded structure for improved mechanical and corrosion resistance performance equivalent to a seamless manufactured tube.

Fine Tubes seam welded, cold redrawn and annealed tube is a cost effective and high quality alternative to seamless tubing. Fine Tubes can supply subsea umbilical control line tubing in continuous coil product form in lengths up to 25,000m, depending on tube dimensions. One of the benefits of this tube compared with seamless manufacture is the improved dimensional tolerance control that can be achieved which helps to minimize the weight and cost of the tubing. Fine Tubes can also supply the tubing in straight lengths of up to 20m for heat exchanger and fluid handling applications.

To summarize, the Fine Tubes Super Duplex alloy 2507 and Duplex alloy 2205 seam welded, cold redrawn and annealed tube has a number of advantages over the traditionally used seamless tubing including:

• Minimum use of orbital joints for Umbilical control line applications in the seam welded and redrawn tube compared with seamless.
• Close control of dimensional accuracy to minimise weight.
• Continuous NDT monitoring of production to ensure the material is free of Sigma phase.
• Lower production costs.

Further details can be found on www.duplextubes.com