[ Super Duplex ]
[ Super Duplex ]
SAF™ 3007 Chemical composition ( nominal ), %
C Si Mn P S Cr Ni Mo W N ≤0.030 0.2 1.0 ≤0.030 ≤0.030 30 7 1.0 3.4 0.40
thermoplastic subsea umbilical tubing . In essence , umbilicals serve as a “ lifeline ” connecting surface installations with subsea critical infrastructure such as wellheads . They include hydraulic lines , chemical injection fluids and electrical cables for controlling and monitoring infrastructure .
160 million meters sold The optimization of SAF™ 2507 for subsea umbilicals , coupled with the dedicated Alleima mill in Chomutov , Czech Republic , ensuring fully integrated production from a single melt of 80 % recycled steel in Sandviken , Sweden , guarantees high quality . The large reels , with long lengths of orbitally welded coils , soon set the industry standard . Over the past 30 years , Alleima has supplied more than 160 million meters ( 525 million feet ) to all major fabricators and applications , equal to circling the world three times .
More tungsten and chrome “ To enhance the performance of SAF™ 2507 , we fine-tuned the chemical composition . As a result , SAF™ 3007 features additional chromium at 30 %, reduced molybdenum at 1 % and , for the first time , Alleima introduces tungsten at 3.4 % to the duplex family of tube alloys . The inclusion of tungsten in preference to molybdenum maintains the corrosion resistance after welding , which is crucial for the umbilical application . Taken together , these properties are ideal for ‘ dynamic umbilicals ’ that are floating and twisting below the ocean surface with high stress in chloride-rich environments ,” says Charlotte Ulfvin , Senior R & D Researcher at Alleima . “ The launch of SAF™ 3007 marks the next step in our duplex evolution , fulfilling customer demands for a next generation umbilical tube with less material and thinner walls . Thanks to the refined chemical composition , we provide a lighter tube that streamlines the entire manufacturing process . It will be made available in a broad size range by the end of 2024 ,” concludes Tom Eriksson , Executive Vice President and Head of R & D at Alleima .