Midwater arches
Umbilical buoyancy
Umbilical buoyancy modules feature quick-release, double-locking latch mechanisms to reduce installation time. An interchangeable internal grommet system allows standard float sizes to accommodate umbilicals from 25 mm to 90 mm diameter, providing a flexible solution for different project requirements.
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Distributed ballast module
Distributed ballast modules provide weight and damping stability at specific locations along risers and pipelines.
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Distributed buoyancy module
Distributed buoyancy modules are used in floating production scenarios to stabilise risers, cables and umbilicals in specific configurations, preventing damage and maintaining project specific geometry throughout operational life.
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Integral buoyancy module
Integral buoyancy modules combine clamp and buoyancy elements into one unit, removing the need for separate internal clamp assemblies.
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Buoyancy clamps
Buoyancy clamps secure buoyancy modules to risers, pipelines, cables and umbilicals, maintaining module position throughout installation and operation while accommodating demanding offshore loads and environmental conditions.
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Company
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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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    • We are an ambitious business, commited to embracing innovation and solving our customers' challenges.
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Midwater arches

Support systems for risers, cables and umbilicals.

Midwater arches support flexible risers, umbilicals and cables as they rise from the seabed to the surface, maintaining position, depth and proximity with a typical design life of 30 years.

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Benefits

Maintain configuration and prevent line clashing

Midwater Arches are used where compact field layouts are required or where flexibles operate in close proximity. They provide support, integrated bend protection and buoyant upthrust to maintain required riser wave configurations. Midwater arches may be used instead of distributed buoyancy modules.

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Deep water
Composite solutions available for deep-water applications provide reliable support for risers, cables and umbilicals while maintaining performance and durability in challenging offshore environments.
System design
Complete system design services are available, including arch structures, moorings and gravity bases, ensuring a fully integrated solution tailored to project requirements.
Modular transport
Modular solutions available for easy transportation and installation help simplify logistics, reduce offshore installation complexity and improve project efficiency.

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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