Mechanical Engineering Services

Mechanical Engineering Services — Onyx Engineering

Onyx Engineering delivers comprehensive mechanical engineering support for demolition, decommissioning, and site redevelopment projects. From feasibility through execution, our multidisciplinary team ensures safe, compliant, and efficient outcomes that integrate seamlessly with project design and operations.

Why choose Onyx for mechanical engineering

• Integrated discipline: Mechanical design, systems assessment, and execution planning aligned with demolition and deconstruction needs.
• Safety and compliance: Projects guided by ISO 45001:2018 and ISO 9001:2015, with rigorous risk assessments, RAMS, and QA/QC controls.
• Asset-preserving approach: Engineering solutions that optimize system removal, salvage, and reuse while safeguarding remaining assets.
• Constructability and efficiency: Practical designs and sequences that minimize downtime and coordinate with utilities, scaffolding, and access constraints.
• Sustainability focus: Material recovery, equipment decontamination, and waste minimization integrated into mechanical plans.

Core capabilities

• Mechanical condition surveys: In-situ assessment of piping, HVAC, process equipment, and mechanical rooms to guide removal sequencing.
• System decommissioning plans: Safe isolation, depressurization, draining, and permits-to-work strategies for complex facilities.
• Equipment removal engineering: Lifting plans, rigging analysis, and dismantling sequences for large machinery and reactors.
• Piping systems de-scoping and isolation: Identification of live runs, hazard assessments, and safe disconnection procedures.
• HVAC and process systems: Safe isolation, adverse condition assessment, and prudent removal or repurposing strategies.
• Ventilation and fire protection integration: Ensuring compliance with environmental controls and fire safety during decommissioning.
• As-built reconciliation: Updating drawings and documentation to reflect completed work and post-demolition conditions.

Typical deliverables

• Mechanical decommissioning strategy and RAMS
• Piping and equipment isolation diagrams
• Equipment removal and rigging plans with lift calculations
• Isometric drawings, line lists, and “as-built” updates
• Interdisciplinary coordination plans (mechanical with electrical, civil, and structural)
• Safety cases, hazard analyses, and commissioning readiness documentation

Process approach

1. Discovery and scope definition: Review of facilities, equipment lists, and regulatory requirements.
2. Risk-based planning: Failure mode analysis, hazard identification, and containment strategies.
3. Detailed engineering design: Removal sequences, isolation points, and interfaces with other trades.
4. Permitting and compliance: Permits-to-work, utility disconnections, and environmental controls.
5. Execution support: On-site engineering oversight, QA/QC checks, and documentation handover.

Health, safety, and environment

• Rigorous risk assessments and RAMS tailored to mechanical activities
• Safe isolation, lockout/tagout procedures, and confined-space considerations
• Dust, noise, and emission controls aligned with site requirements
• Training and competency for engineering staff and contractors

Compliance and certifications

• ISO 9001:2015 – Quality Management
• ISO 45001:2018 – Occupational Health & Safety Management
• Industry-specific standards (where applicable): ASME, API, NFPA, local codes
• Documentation: Inspection reports, test records, and compliant handover packages