Dyneema® DM20 fiber: engineered for smarter systems

When the future of global energy lies in the balance, every fiber of every offshore operation counts. And some count more than others – like Dyneema® DM20 fiber. This Dyneema® grade is carefully designed to bring offshore energy projects, both traditional and renewable, to life as safely and efficiently as possible.

The result? Successful projects that power up wind power while driving down the cost of energy for all.

Dyneema® enables STRENGTHplus+

Mooring lines and subsea tethers made with Dyneema® are uniquely strong – but there’s much more to it than that. Dyneema® DM20 fiber is the only HMPE fiber that’s suitable as a load-bearing core for permanent installation and has a DNV-approved lifetime performance model.


* for mooring lines and subsea tethers

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Cutting the costs of offshore energy

At Dyneema®, we’ve got decades of offshore experience behind us, woven into our fiber technologies. And we’re proud to support the industry with high-performance tethers, tendons, and mooring ropes made with Dyneema® DM20 fiber – as strong as steel but 85% lighter, for greater time and cost efficiency during transport and installation.

For more efficient offshore energy

  • Engineers can support you in design choices

  • Lightweight fibers offer design freedom and installation benefits

  • Long lifetime suitable for permanent moorings

  • Bespoke technologies for cut- and abrasion-resistant mooring line covers

Mooring lines that are reliable under pressure

Demand for offshore energy is rising. Projects are growing in size and complexity and heading into deeper waters. Safety and reliability are the ultimate priorities in tough offshore conditions – especially when deadlines are tight.

These challenges mean the limitations of mooring ropes and subsea tethers made from conventional steel or generic high-modulus polyethylene (HMPE) are increasingly under the microscope. The good news? Mooring lines and subsea tethers made from Dyneema® fibers are more than capable of taking the strain.

For greater peace of mind

  • Predictable longevity

  • Performance-driven retirement criteria

  • Support from our engineers

  • Anti-abrasion and anti-cut solutions

  • High strength-to-weight ratio

  • Near-neutral buoyancy

  • Superior service life

  • Excellent resistance to fatigue and creep

  • Reduced chance of failure

Making offshore energy projects greener than ever

It’s pretty simple: in a world that’s woken up to the sustainability challenge, Dyneema® delivers the lowest carbon footprint per unit strength of all high-performance fibers. Opting for more sustainable mooring and tethering solutions made with Dyneema® fiber can fast add up to a lower footprint for your offshore operations.

How? Upstream, 100% of the energy used to make our fibers comes from renewable sources. Downstream, lightweight Dyneema®-based mooring lines and subsea tethers enable less energy use in transport and operations – plus, their longer service life means greater resource efficiency.

But did you know you can also benefit from the same high performance as conventional Dyneema® with a carbon footprint 90% lower than generic HMPE? To make your offshore installation even greener, choose bio-based Dyneema® fiber: the world’s first-ever bio-based HMPE fiber.

For a big impact with a small footprint

  • Reliably longer service life enables less resource consumption

  • Low weight typically means less energy use

  • Bio-based Dyneema® available

Want the same high performance with a lower carbon footprint?

Discover bio-based Dyneema® fiber
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Putting performance to the test

Products made with Dyneema® have been in use in offshore environments for three decades, with their lightweight strength making them a favored solution. But world’s strongest fiber™ offers so much more than just strength. Offshore applications are the perfect target for the all-round power of Dyneema® fiber, as proven by our suite of proprietary, state-of-the-art testing equipment.

In fact, we’re the only manufacturer to rigorously test both the fiber and the rope – simulating real-world conditions and evaluating product performance. And we use the results to help us engineer even better fibers and predict a rope’s lifetime based on various critical operating parameters.  

Visco Elastic Behavior Model

Accurate stress and strain calculations using popular mooring analysis software.

Rope Tension Fatigue Model

Built on thousands of tests at fiber and rope level, this tool is the only way to accurately predict fatigue performance.

Fairlead Abrasions Test

Here we evaluate external abrasion under actual usage conditions – ideal for measuring the impact of metal surfaces, sheaves, and fairleads when winching, lifting, and mooring.

Creep Performance Tool

Our modeling predicts creep rate and elongations as well as estimating creep lifetime.

Rope Temperature Model

Accurately predicting rope core temperatures means Dyneema® fiber can be used safely at higher operating temperatures.

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Finding the right fiber grade

If you design or operate offshore energy systems or related infrastructure, you want to know your crews will be using the right tools for the job. Some lines need protective covers to provide extra resistance to abrasion or cutting. Contact us for our recommendations on the best Dyneema® grade for your application.

Dyneema® DM20 fiber

We recommend Dyneema® DM20 fiber for the load-bearing core of subsea tethers and mooring lines. Offering the highest fatigue lifetime of all UHMWPE fibers, it’s the only UHMWPE suitable for permanent installations.

Dyneema® SK78 fiber

If creep, abrasion, temperature, durability, and/or fatigue are critical issues in your application, this is the grade for you.

Dyneema® DM20 XBO fiber

Is superior bendability essential in your application? Here’s the fiber grade you need.

Thanks to strong engineering support from Dyneema®, we can optimize our system to benefit from lightweight technologies.

Henrik Stiesdal, Founder & CTO, Stiesdal

Preferred. Trusted. Certified.

Offshore energy projects using products made with Dyneema® have been certified by organizations like DNV, ABS, BV, Lloyds, and more. Want to learn more? Need support with certification? Contact our team today.

Contact our sales team

Looking for your next subsea tethers and tendons? Seeking a better mooring system solution? Look no further. We’ve got a portfolio of game-changing fibers and a wealth of offshore expertise to help you find the perfect fit for your project.

Contact us
  • Input during FEED / initial engineering
  • Optimized system design based on functional and lifetime requirements
  • LCOE reductions
  • Support with certification
  • Strong understanding of key cost drivers – and mitigators – in fabrication, installation, operation, and maintenance
  • Customized approach to local challenges such as ultra-deep-water projects, tough environmental conditions, and higher temperatures

Mooring line suppliers and partners

Our premium mooring line and subsea tether partners are dedicated to manufacturing strong, safe, and reliable solutions with Dyneema® fiber – so you can plumb new depths of offshore success. Looking for extra peace of mind? Our partners are happy to offer the service and maintenance packages you need to keep your operations running smoothly and safely, day in, day out.

Where to buy

Subsea tethers and mooring lines made with Dyneema® fiber are available from our trusted partners across the globe.

Find a provider

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