Services
Mechanical Completion
Mechanical completion is the first major step of oil and gas pre-commissioning, ensuring the handover from construction to commissioning is done with precision and safety. At MCCS, we have been delivering international mechanical completion and pre commissioning services to offshore oil and gas projects across Asia, the Pacific, the Middle East, and Europe for over 30 years. With our expertise and attention to detail, your offshore project will be set for a seamless transition to the next stage.
What Is Mechanical Completion?
Mechanical completion in oil and gas projects ensures that all equipment, piping, instruments, and systems are fully installed and verified in accordance with engineering design, safety requirements and global construction standards. Our experienced engineers, supervisors, and technicians can manage every aspect of the mechanical completion to pre-commissioning process to prepare your assets for safe commissioning and start-up.
The Stages of Mechanical Completion
The stages of mechanical completion involve the final construction checks, documentation handover, and preparation for pre-commissioning. This is broken down into stages defining systems, inspections & tests, punch list clearing, and finishes with formal certification. Click one of the dropdowns for more information on that stage.
Systems and Sub-systems Breakdown
We structure your project into systems and subsystems to streamline execution and documentation. Our scope includes:
- Breaking down the facility into sections, what we call packages.
- Defining system boundaries, tags, and discipline ownership.
- Prioritisation of packages with commissioning and start-up logic in mind.
This structured approach improves traceability, speeds up approvals and supports efficient handover to the pre-commissioning stage.
Comprehensive Inspection & Verification
MCCS performs detailed inspections to confirm that all equipment and components are installed correctly and ready for testing. This includes:
- Verification of mechanical alignment, piping, supports and structural elements.
- Instrument installation and continuity tests.
- Electrical tests of continuity, cable megger, grounding, etc.
- Piping and instrumentation diagram conformity checks to ensure compliance with international codes and client standards
Our process ensures quality, safety, and full engineering integrity before the system progresses into oil and gas pre-commissioning.
Static Testing & Verification Activities
MCCS executes all required static tests for quality confirmations to ensure your offshore oil and gas project is safe and leak-free. This includes:
- Flange management.
- Pressure tests, including hydrotesting, pneumatic testing, and nitrogen/helium leak testing.
- Pipelines cleaning, which can be done by flushing, chemical cleaning, nitrogen purging, or air blowing.
- Equipment and vessel integrity inspections.
Punch List Management
Our teams lead and coordinate punch list activities to ensure incomplete issues are identified, tracked and closed. We track progress with our own specially designed completion management software, PUMA+, which allows us to:
- Categorise punch items into priorities (A, B, and C).
- Close critical A-priority punches before handover to oil and gas pre-commissioning.
- Ensuring transparency and efficiency in managing punch lists to avoid delays in project timelines.
Inspection Test Records and Certification
This is the formal sign-off of mechanical completion certificates that state that systems are built to specification, have been tested thoroughly, and that the project is ready for pre-commissioning. We manage all project documents with PUMA+, ensuring the following records and certificates are accurately captured and verified:
- Mechanical Completion Certificate
- Ready for Commissioning Certificate
- Inspection Test Records in accordance with the inspection test plan
- QA/QC verification
- Witnessing strategy with client.
Handover to Pre-commissioning
Once all activities are completed, we formally certify the system as ready for oil and gas pre-commissioning. This final stage includes:
- Validating documentation and punch item closure.
- Ensuring system/subsystem readiness
- Coordinating with commissioning teams for a smooth transition.
Choose MCCS As Your Mechanical Completion Coordinator
Our focus is to handover systems for pre-commissioning with full transparency without exceptions. With over 30 years of experience, we are well-positioned to provide a bespoke, quality testing and handover plan for any offshore oil and gas project.
MCCS has had the privilege of serving a diverse portfolio of international clients
