Confidential Oil & Gas Operator
Offshore Platform & Onshore Processing Facility, Malaysia

Ventilation integrity is critical in oil & gas environments, particularly within control rooms, accommodation blocks, and technical spaces where personnel operate continuously. This project involved comprehensive ventilation and exhaust system cleaning across both offshore and onshore assets under strict safety protocols.

System Overview

• Multiple AHUs serving control rooms, accommodation areas, and technical zones

• Hazard-classified operational environment

• Combined offshore and onshore systems

• Continuous operations with limited shutdown window

The facility required cleaning works to be executed within tightly controlled maintenance windows without disrupting critical plant operations.

Scope of Work

• Supply and return ventilation duct cleaning

• Fresh air intake cleaning

• Exhaust duct and exhaust fan cleaning

• AHU internal cleaning and coil surface restoration

• Access panel installation where required for compliance

• Pre- and post-cleaning photographic documentation

• Differential pressure and airflow verification

Issues Identified

Initial inspection revealed:

• Heavy dust and particulate accumulation within duct interiors

• Early-stage corrosion at selected duct sections

• Reduced airflow in critical control room areas

• Contaminant build-up affecting indoor air quality for operational personnel

Given the nature of oil & gas operations, ventilation performance directly impacts worker safety, equipment protection, and environmental control standards.

Operational Challenges

This project required advanced coordination and compliance management due to:

• Strict PTW (Permit to Work) procedures

• Hazard-classified work zones

• Confined space entry requirements

• Coordination with live plant operations

• Tight execution timeline during scheduled maintenance shutdown

All activities were executed in accordance with site-specific safety regulations and confined space protocols.

Technical Execution

Cleaning methodology included:

• Mechanical brushing and high-capacity negative air extraction

• Coil surface cleaning to restore heat exchange efficiency

• Exhaust fan dismantling and deep cleaning

• Fresh air intake decontamination to prevent reintroduction of particulates

• Installation of access panels to improve long-term maintenance accessibility

Pre- and post-cleaning documentation was compiled to verify internal condition restoration. Airflow measurements and differential pressure testing were conducted to confirm operational performance.

Outcome

• Ventilation systems restored to hygienic internal condition

• Improved airflow distribution to critical occupied zones

• Reduced airborne particulate circulation

• Compliance-ready cleaning documentation submitted to facility management

• Enhanced system serviceability for future maintenance cycles