Subsea, Pipelines and Infrastructure

Driving the standards of subsea innovation

Energies

Whether part of a fixed platform, floating installation, tie-back system, or standalone development, subsea assets and infrastructure are fundamental to any offshore production system. From wellheads, umbilicals, pipelines, risers, and flowlines to their supporting structures, foundations, and anchors, these systems are highly sophisticated and operate in extreme, hard-to-access environments where reliability is critical.

At LR Energies, we help owners, operators, EPC contractors, and their supply chains manage technical and operational risk, ensure compliance, and enhance reliability across subsea systems and offshore equipment. From initial design and engineering verification to the inspection of hardware that underpins safe production, we help you navigate the unique challenges of the subsea sector.

Independent Verification & Certification
Type Approval & Technology Qualification
Asset Integrity
Design & Engineering Approval

Ensuring your pipelines, foundations, and anchors meet rigorous global standards and local regulatory requirements.

Accelerating the deployment of novel subsea technologies through structured, risk-based validation.

Applying advanced data insights to manage structural fatigue and pipeline integrity in high-pressure environments.

Verifying that subsea components are engineered for long-term operability before they ever reach the seabed.

Ensuring your pipelines, foundations, and anchors meet rigorous global standards and local regulatory requirements.

Accelerating the deployment of novel subsea technologies through structured, risk-based validation.

Applying advanced data insights to manage structural fatigue and pipeline integrity in high-pressure environments.

Verifying that subsea components are engineered for long-term operability before they ever reach the seabed.

Driving Subsea Standards and Innovation

As the industry moves into deeper and more remote waters, subsea engineering is advancing rapidly and becoming increasingly critical to success. Through Joint Industry Projects and research in subsea processing, remote inspection, and deepwater technologies, we keep clients at the forefront of innovation. Our experts are leaders in the subsea industry, actively contributing to committees and working groups that develop and maintain critical standards such as API 17J, API 17B, IEC standards, PD8010-2, and other guidelines across offshore, renewable, and process disciplines.

Beyond shaping standards, our specialists share their knowledge globally, presenting at industry conferences, publishing technical insights, and driving innovation in subsea engineering, including:

OMAE 2023 – Upheaval Buckling Analysis of the Large Deformation of Unbonded Flexible Pipe under Cyclic Pressure and Temperature Loadings
OTC 2023 – Upheaval Buckling of Unbonded Flexibles Pipes – An Alternative Approach
SPT 2024 – Balancing Act: Navigating Residual Lay Tension in Subsea Pipelines Design
OMAE 2025 - A Fracture Mechanics Study on Pressure Armour Wire in Flexible Pipes.

	Assurance	Advisory
Rigid pipelines, flowlines and tie-backs (Including: rigid steel and CRA pipelines supporting oil and gas, carbon transport and emerging energy systems)	Design verification to recognised codes and project specifications Route, geohazard and on-bottom stability reviews Free-span assessment, fatigue and integrity evaluations Fabrication, welding and NDT oversight; testing and commissioning assurance Requalification and verification for modifications and late-life operation	Fitness-for-service and remaining life assessments Integrity management strategies (RBI/RBM) and inspection planning Failure investigation and remediation recommendations Decommissioning planning and comparative assessment support
Flexible pipelines and risers (Including: flexible pipes, dynamic risers and associated end fittings)	Design review and certification support for flexible systems and accessories Type Approval and Technology Qualification for new designs and materials Manufacturing surveillance and test witnessing Fatigue assessment and performance verification for dynamic applications Installation readiness, offshore attendance and commissioning assurance	Flexible integrity management planning and KPI development Global analysis – static and dynamic assessments Assessment of ageing mechanisms (e.g., armour wire degradation, water ingress) Life extension and replacement strategy development Optimisation of inspection, monitoring and intervention programmes
Umbilicals and control systems (Including: hydraulic and fibre-optic performance, from design through installation and operation)	Design verification and compliance assessment FAT/SAT oversight and witness testing Manufacturing and storage surveillance; installation assurance	Reliability and availability support for subsea control architectures Integrity management and condition monitoring strategy Failure investigation and repair readiness planning Interface management and requirements alignment across suppliers
Subsea structures and infrastructure (Including: templates, manifolds, foundations, PLEMs/PLETs and protection structures)	Structural design appraisal (static, dynamic and fatigue) Geotechnical assessment for foundations and seabed interaction Fabrication assurance, materials and welding certification Lifting and installation analysis review; installation readiness verification Corrosion protection and CP appraisal	Modification, tie-in and debottlenecking reviews Life extension and requalification studies Decommissioning strategy input and risk review
Subsea equipment (Including: trees, manifolds, valves, connectors)	Type Approval for subsea equipment and components Technology Qualification to manage innovation risk Vendor quality surveillance and criticality-based inspection Functional and interface verification to project requirements	RAM and maintainability support for equipment selection Failure mode and effects analysis (FMEA) facilitation Root-cause analysis and corrective action support Standardisation and lifecycle cost optimisation
Subsea cables (Including: power and communication cables supporting offshore wind, interconnectors and subsea production systems)	Design review, manufacturing surveillance and witness testing Installation assurance Thermal rating, loading and integrity verification Commissioning and acceptance support	Route risk assessment and seabed interaction studies Cable protection and repair strategy development Dynamic cable fatigue assessment for floating wind applications Failure investigation and lessons-learned workshops

Subsea, Pipelines and Infrastructure FAQs

LR supports rigid and flexible pipelines and risers, umbilicals, subsea structures, trees and equipment, and subsea cables including renewables applications.

Yes. We provide independent assurance through certification, verification, Type Approval and Technology Qualification, as well as advisory services to de-risk decisions and improve integrity and performance.

Yes. LR supports requalification, fitness-for-service, remaining life assessments and decommissioning risk reviews to help you plan and execute safely and efficiently.