Ballast module
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Uraduct® Ballast
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AIS is a global leader in the engineering, manufacture and application of insulation and passive fire protection systems, as well as buoyancy and SURF (subsea, umbilicals, risers and flowlines) products.
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Ballast module

Controlled ballast for subsea stability

Ballast modules provide additional submerged weight to flexible pipes, umbilicals and cables, helping to protect subsea lines, maintain bottom stability and prevent over-tension. They can also be used to create and maintain the required lazy-wave configuration in dynamic systems, providing controlled weight distribution for demanding subsea applications.

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Benefits

Durable ballast for demanding subsea environments

Iron cast ballast modules are designed to withstand extreme subsea loads while maintaining the required configuration throughout the life of the project. Elastomeric pads within the modules provide compatibility with minimum bend radius requirements, while sacrificial anodes provide corrosion protection.

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Bespoke design
AIS engineers analyse requirements to optimise the design and deliver bespoke solutions with weight in water from 5 kg to 100 kg and material density from 7 to 11 to ensure optimum line protection.
Robust and durable
Modules are designed and rigorously tested to withstand extreme loads across the 30 year lifespan of a service line. They are maintenance free and their end-of-life properties have been considered.
Easy installation
Designed for in-line installation using standard tools with integrated lifting points, reducing offshore handling time, improving safety and lowering installation cost.

Specifications

Applications

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The new AIS website is now live
With a fresh look and simple navigation, we are pleased to announce that the new AIS website is now live.
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October 1, 2026
AIS completes acquisition of Matrix Composites & Engineering
Marking the next phase of its growth strategy, AIS is delighted to announce that it has received all necessary approvals and completed the acquisition of Matrix Composites & Engineering, a leading Australian provider of advanced composite materials and subsea engineering solutions.
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July 23, 2026
LS Cable & System awards contract for Taiwan’s Fengmiao offshore wind project
NjordGuard cable protection systems will protect the inter-array cables for the project’s fixed-bottom wind turbines.
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