AGRU SWIR Systems
HDPE solutions for deep seawater intake risers
Access colder seawater from depth with project-specific HDPE riser systems engineered for offshore intake applications. AGRU combines large-diameter pipe technology, butt-fusion welded joints and application-specific engineering for reliable long-term performance in demanding marine environments.
Built for offshore performance
- Seawater intake from depth to access colder water below the thermocline.
- Lower structural weight than metallic or other material alternatives for large-diameter risers.
- Butt-fusion welded HDPE pipe strings with smooth internal flow surfaces.
- Engineered for dynamic offshore conditions and long service life in seawater.
Your Advantages with AGRU
- Colder water. Better cooling performance.
- Corrosion-free material. Lower maintenance exposure.
- Project-specific engineering from pipe string to connection interface.
WHY SWIR
Colder seawater at depth. Better cooling performance offshore.
In warm-water offshore regions, seawater temperature typically drops rapidly across the thermocline. Drawing intake water from deeper levels can improve cooling efficiency and support more stable process conditions.
AGRU SWIR Systems use large-diameter HDPE as a corrosion-free material platform for deepwater intake concepts where weight, durability and installation logistics matter.
The system approach combines XXL pipe capability, butt-fusion welded joints and project-specific engineering for offshore loads, vessel interfaces and installation requirements.
KEY BENEFITS
Built for long service life in demanding offshore conditions.
SWIR is a lasting solution where operators and EPCs need colder seawater, lower corrosion-related maintenance exposure and a project-specific riser system engineered for offshore service.
Homogeneous butt-fusion welded joints
Fusion welding creates a continuous piping system architecture designed for long-term leak-tightness and structural continuity.
Tailored for riser loads, motions and interfaces
Each project requires dedicated engineering for hydrodynamics, ballast, vessel interface design, stress, fatigue and installation method.
From pipe extrusion to customized fittings
AGRU combines large-diameter pipe production, customized parts and welding know-how into an integrated single-source system solution.
Lightweight by design
Lower self-weight helps support deepwater riser concepts, offshore handling and installation flexibility.
Colder intake water
Deeper intake can provide colder source water for improved heat-exchanger performance in warm offshore environments.
Corrosion-free material
HDPE is resistant to seawater corrosion and helps avoid the external corrosion issues associated with metallic systems.
Reduced maintenance
Smooth hydraulic surfaces and corrosion-free material behavior support efficient long-term operation.
ENGINEERING FOCUS
Project-specific engineering instead of an off-the-shelf riser concept.
Deepwater seawater intake risers must be designed around the thermal, hydraulic and structural boundary conditions of each asset. That includes intake depth, flow rate, diameter, ballast concept, vessel motion and installation method.
Structural design for offshore motions
Riser behaviour must be validated for vessel motions, storm loading, tension management, fatigue and installation scenarios.
Hydraulic and thermal optimization
Diameter, intake depth and flow rate influence temperature gain, pressure loss and overall system efficiency.
Large-diameter HDPE system capability
AGRU delivers XXL piping solutions for seawater intake, outfalls, desalination and other water infrastructure, with diameters up to OD 3500 mm.
Single-source delivery logic
Pipes, fittings, customized components and welding technology from one supplier simplify interface management on EPC-scale projects.
APPLICATIONS
Designed for offshore cooling and high-volume seawater intake infrastructure.
SWIR is relevant wherever colder seawater, corrosion-free materials and project-specific deepwater intake engineering are required.
FPSO and floating production assets
Cold deepwater intake for process cooling and efficiency gains in tropical offshore regions.
Desalination intake infrastructure
Large-diameter seawater intake systems where corrosion-free operation and flow efficiency are critical.
Industrial marine cooling
Long-life seawater intake systems for coastal and offshore process industries.
Custom offshore water systems
Project-specific applications requiring tailored fittings, large diameters and engineered interfaces.
Aligned with operator and EPC priorities
The commercial value combines access to colder seawater, minimized corrosion-related lifecycle costs and a deepwater intake system purpose-built for the project's unique conditions.
AQ
Key questions about SWIR systems
What is an SWIR system?
Here, SWIR refers to a seawater intake riser system: a deepwater intake concept that draws colder seawater from depth through a large-diameter riser for offshore process or cooling applications.
Why use HDPE instead of metallic risers?
HDPE offers corrosion resistance in seawater, lower structural weight, butt-fusion welded continuity and smooth hydraulic surfaces, which can be advantageous for large-diameter offshore intake systems.
Why is the thermocline relevant?
The thermocline is the ocean layer where temperature drops rapidly with depth. Drawing water from below that layer can provide colder intake water and improve cooling efficiency in warm offshore regions.
Is this an off-the-shelf product?
No. Intake depth, flow rate, diameter, ballast strategy, vessel interface and installation method need to be engineered for the individual asset and site conditions.