Services

Offshore Hook-Up (HUC) & Commissioning

Complete turnkey offshore hook-up for safe & efficient offshore mechanical completion.

MCCS provides full, bespoke offshore hook-up services for greenfield and brownfield projects across offshore platforms, storage and offloading units, and remote onshore facilities.

With over 30 years of global experience, MCCS delivers the personnel, engineering, logistics, equipment, and marine spreads required to bring newly installed oil and gas projects to a safe operational state.

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What is Offshore Hook-Up and Commissioning?

Offshore hook-up and commissioning is the final installation and energisation of mechanically completed equipment and systems. The process includes dynamic trials of systems and sub-systems, with handover of Ready For Start-Up (RFSU) certificates, commissioning dossiers, and respective data that give proof of mechanical completion and commissioning.

Offshore hook-up and commissioning activities prepare for the start-up of oil and gas projects. It can include thorough testing of the power generation systems, testing of emergency shutdown and control systems, and dynamic trials of oil and gas export systems.

Offshore Commissioning & Maintenance

MCCS ensures seamless energisation and testing of equipment, providing Ready For Start-Up certificates for onshore and offshore projects. Services include factory acceptance testing, compliance verification, and comprehensive preservation and maintenance planning. Our detailed offshore commissioning procedures and experienced mechanical completion team guarantee a phased handover of systems with complete documentation, supporting the client from start-up to the operation and maintenance phase.

A Multidisciplinary Skilled Workforce

Our workforce is certified to OGSP, BOSIE, HUET, CAW, IMIST, IRATA and other offshore requirements. We can deploy any number of skilled workers to the task, including:

Mechanical technicians
Structural fitters & welders
Pipe fitters & fabricators
Instrument technicians
Electrical technicians
Commissioning engineers
QA/QC inspectors
Rope access technicians
Rigging & lifting specialists
Supervisors, team leaders & offshore construction managers

Tools, Equipment & Temporary Facilities

MCCS can supply a full suite of offshore hook-up tools and support equipment:

Mechanical and hydraulic bolting equipment
Pneumatic tools and torqueing tools
Welding machines & habitat enclosures
N2/He leak detection system
Load testing equipment
Temporary power generation
Portable office cabins, workshops & storage containers
Communication and IT systems

All of our equipment is calibrated, certified, and fully compliant with international safety standards.

HSE, Quality Assurance & Regulatory Compliance

We aim for zero recordable incidents on every project and maintain a safety-first culture through:

On-site HSE officers
Safety induction & toolbox briefings
Permit-to-Work compliance
LOTO implementation
Job Safety Analysis reports (JSA) and risk assessments
Incident reporting & management through proprietary Puma+ software
Full QA/QC inspection and documentation
Regulatory compliance with client and international standards
Essential pre-mobilisation and on-site training to familiarise workers with the workpack and hook-up procedures
Equipment handling and emergency response training

Engineering & Workpack Development

We prepare all the engineering requirements and documentation required for hook-up:

Mechanical, electrical, and instrumentation hook-up
Structural tie-ins
Workpack preparation and task planning
Red-line markups and as-built update
Verification against P&IDs, GA drawings, and system boundaries
Material take-off and resource planning

This ensures a seamless transition from fabrication yards to offshore installation.

Hook-Up Construction

MCCS manages complete offshore hook-up execution to ensure systems are compliant with engineering design and commissioning requirements, including:

Structural connections and supports installation
Piping tie-ins and piping spool installation
Cable pulling, termination, and glanding
Junction box installation
Instrument hook-up and calibration
Utility packages/equipment installation
Bolt torquing and tensioning
Hydrotesting, pneumatic testing & leak testing
Valve installation, stroking & function testing

Planning, Scheduling & Project Management

We manage the entire hook-up process from start to mechanical completion to deliver it on time and within budget:

Mobilisation planning
Resource scheduling & logistics
Interface management with fabrication yard, installation contractor & client
Progress tracking and daily reporting
Risk assessment studies & mitigation measures
Cost control and change management

Integration with Pre-Commissioning & Commissioning

Once offshore hookup is complete, we can support you with a seamless transition to all subsequent phases, including:

Mechanical Completion
Pre-Commissioning checks
Assisting the commissioning team with function testing
Closing punch lists (A, B, C categories)
Ensuring system readiness for start-up

Choose MCCS to Hook-Up Your Oil and Gas Project

MCCS offers turnkey offshore hook-up services, supplying personnel, engineering, equipment, and marine spreads. Countless onshore remote plants and offshore platforms across the world rely on MCCS’ experienced teams to ensure the startup to smooth, safe, and profitable operations.

For project inquiries or onshore and offshore maintenance support, reach out to our team today.