Keruite's engineering team in Sri Lanka has developed a axial fan energy optimization checklist for petrochemical facilities. The checklist covers 15 items, and most facilities we audit have at least 5 items that can be improved. This article walks through the checklist with typical findings and savings estimates.
Current Situation
The petrochemical sector in Sri Lanka is experiencing increased demand for high-efficiency axial fan systems, driven by rising energy costs and stricter compliance requirements. Projects specifying equipment in the 5,000 to 50,000 m3/h range at 1,500 to 8,000 Pa represent a growing segment, with motor ratings typically between 200 kW and the next size up.
The IE2 motor class is now the minimum specification for most new projects, and IECEx certification is increasingly required for petrochemical applications.
Documentation is another area where petrochemical facilities in Sri Lanka often fall short. A comprehensive axial fan record should include the original specification, the certified performance curve, commissioning baseline data, all maintenance readings, and a log of any modifications or repairs. This documentation supports warranty claims, compliance audits (EN 12101-3, ISO 13348), and replacement planning. Facilities that maintain this documentation consistently report faster regulatory inspections and lower overall compliance costs.
Technical Considerations
Several technical factors affect axial fan performance in petrochemical applications. The operating temperature range (0 to 400 C) influences material selection (FRP (fiberglass reinforced plastic)) and motor derating requirements. The noise specification (55 to 75 dB(A)) may require silencers or acoustic enclosures. And the certification requirements (IECEx, IECEx) affect both the equipment specification and the documentation package.
For projects in Sri Lanka subject to EN 12101-3 and ISO 13348, the documentation requirements have become more detailed over the past two years, adding approximately 3 to 5 percent to engineering costs but reducing installation inspection delays.
In practice, this means that petrochemical facilities in Sri Lanka should establish a clear specification document before approaching vendors. The document should include the design airflow (5,000 to 50,000 m3/h), required static pressure (1,500 to 8,000 Pa), operating temperature range (0 to 400 C), material preference (FRP (fiberglass reinforced plastic)), noise limits (55 to 75 dB(A)), and any certification requirements (IECEx, IECEx). Projects that skip this step typically experience 20 to 30 percent more change orders during installation, which drives up costs and delays commissioning.
Practical Recommendations
For procurement teams specifying axial fan equipment, budget an extra 5 to 10 percent for the IE2 motor upgrade and factor in the energy savings over the equipment life. Compliance with ISO 13348 requirements may also affect the project timeline. Request certified performance data from the manufacturer rather than relying on calculated values.
For petrochemical projects in Sri Lanka, the procurement process for a axial fan should begin at least 12 to 16 weeks before the required on-site date. This allows time for engineering review, factory testing, and shipping. Custom specifications โ such as non-standard materials (FRP (fiberglass reinforced plastic)), special motor ratings (200 kW), or additional certifications โ may extend lead times to 20 weeks. Planning for these timelines early avoids the premium pricing and quality risks associated with rush orders.
| Parameter | Specification |
| Airflow Range | 5,000 to 50,000 m3/h |
| Static Pressure | 1,500 to 8,000 Pa |
| Motor Power | 200 kW (IE2) |
| Material | FRP (fiberglass reinforced plastic) |
| Temperature Range | 0 to 400 C |
| Impeller Balance | G6.3 (ISO 1940) |
| Noise Level | 55 to 75 dB(A) |
| Certifications | IECEx, IECEx |
| Standards | EN 12101-3, ISO 13348 |
Common Specification Mistakes
After reviewing hundreds of axial fan specifications for petrochemical projects, several recurring mistakes stand out. The most common is specifying only design airflow and pressure without stating the actual system curve. The second is neglecting system effect, which can reduce delivered airflow by up to 20 percent. The third is under-specifying material requirements โ a axial fan in a mildly corrosive environment will develop impeller fouling within 3 to 5 years if FRP (fiberglass reinforced plastic) is used without appropriate protection.
Other frequent issues include forgetting to specify the motor efficiency class (IE2 should be the minimum for new installations), not requiring factory performance test data, and omitting noise requirements (55 to 75 dB(A)).
Quality Assurance and Testing
Every axial fan unit leaving our factory undergoes a standardized test procedure that includes a run test at full speed, vibration measurement at all bearing locations (must meet G6.3 grade), and verification of impeller balance. For units above 200 kW motor rating, we also perform a witnessed performance test on the AMCA-standard test rig, measuring airflow, pressure, and power consumption at three operating points.
Field testing after installation should replicate key factory measurements to establish the commissioning baseline. The measured airflow and pressure should be within 5 percent of design values. All commissioning data should be documented and retained as part of the project quality records.
Procurement and Lead Time Planning
For petrochemical projects specifying axial fan equipment in Sri Lanka, procurement should begin 12 to 16 weeks before the required delivery date for standard configurations (FRP (fiberglass reinforced plastic) construction, IECEx certified). Custom specifications such as special materials or multiple certifications (IECEx and IECEx) may extend lead times to 20 weeks.
When requesting quotations, provide the complete specification including airflow (5,000 to 50,000 m3/h), pressure (1,500 to 8,000 Pa), operating temperature (0 to 400 C), noise requirement (55 to 75 dB(A)), and certification requirements. Incomplete specifications lead to assumptions that may not match actual site conditions.
Conclusion
Every axial fan project in petrochemical applications has its own unique requirements, but the engineering fundamentals remain the same. The parameters and practices discussed here have been validated across hundreds of installations. Contact our team for project-specific guidance.