Triple stranded FIMT | NBG Fiber Optics



Triple Stranded Tube


TST stands for Triple Stranded Tube and is especially designed for vertical installation purposes in harsh environments. This cable comes up with a design, where the three inner tubes are stranded along with a smooth pitch, allowing the fibers to hold their place while gravity wants to elongate or break them during hanging applications. A final protective layer made of a highly anti-corrosive steel grade allows using this product even in aggressive environments. Due to high-precision in the manufacturing processes, this cable design can be combined with additional layers of stranding wires or compact metal sheets for even more tensile strength or hydrostatic pressure ratings.

  • 07-Downhole Downhole optimised
  • 03-Upstream Designed for O&G
  • 24-High Strenght pressure resistant ​


Product abbreviation TST
Cable usage Data Transm. & Sensing
Outer diameter 5.75 mm or 6.35 mm (1/4”)
Dimension of one inner tube 2.35 mm x 0.20 mm
Cost effective steel grade mixing Wide range possible
Outer tube material High anti-corrosive mat.
Approx. Cable weight 76 kg or 123 kg per km
Hydrostatical pressure rating Up to 3 500 bar (calc.)
Maximum continuous length Up to 15 km
Operational temperature range -60°C up to +800°C
Excess Fiber Length (EFL) Exceeds 0.6 %
Perfect usage for Vertical installation

All values, product specifications and other given data are subject to change without notice to improve reliability, function, design or otherwise. Information contained in this data sheet are up-to-date as at the date of issue. As NBG cannot control or anticipate the conditions under which this product may be used, each user should review the information in specific context of the planned use. To the maximum extent permitted by law, NBG will not be responsible for damages of any nature resulting from the use or reliance upon the information contained in this data sheet.

Product overview created by Patrick Weissinger – 21.03.2019


Richard Groffie

Fiber Optics Solution Specialis
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