This article's table of contents introduction:
- What is this Fan?
- Key Material: 16Mn Steel
- Critical Specifications (Check These)
- Potential Issues to Watch For
- Common Equivalent Specifications (For Sourcing)
It looks like you're referencing a heavy-duty industrial fan used for boiler ventilation (likely an FD Fan or Forced Draft Fan), made from 16Mn steel.
Here is a breakdown of what this specification typically means for procurement, engineering, or replacement:
What is this Fan?
- Heavy Duty Building Ventilation: This indicates the fan is designed for industrial environments (power plants, steel mills, chemical plants) rather than light commercial HVAC.
- FD Boiler Fan: A Forced Draft (FD) Fan supplies air to the boiler's burners for combustion. It operates upstream of the boiler, handling relatively clean, cool air (ambient).
- Industrial 16Mn: This refers to the material of construction.
Key Material: 16Mn Steel
- What is 16Mn? It is a Chinese standard low-alloy, high-strength structural steel (GB/T 1591). It is roughly equivalent to:
- ASTM A516 Gr. 55/60 (Pressure Vessel quality)
- DIN 17100 St52-3
- S355J2G3 (EN 10025)
- Why use it for an FD Fan?
- Higher Strength: Superior yield strength (~345 MPa) compared to standard Q235 carbon steel.
- Wear Resistance: Better resistance to abrasion from dust particles in the air stream.
- Weldability: Good welding characteristics for constructing impellers and housings.
- Thinner Material: Allows for a lighter fan while maintaining structural integrity (reduces shaft load and bearing stress).
Critical Specifications (Check These)
When ordering or replacing a Heavy Duty 16Mn FD Fan, you need to match these parameters:
| Parameter | Typical Value (Example) | Notes |
|---|---|---|
| Type | Centrifugal (Backward/Forward Curved) | Usually backward curved (efficiency) or radial (for dust). |
| Volumetric Flow | 50,000 – 500,000+ m³/hr | Matches boiler size. |
| Pressure (SP) | 2000 – 6000 Pa | Static Pressure required to overcome duct & burner losses. |
| Temperature | 20°C – 80°C (Ambient) | FD fans do not typically handle hot flue gas (that's ID / Induced Draft). |
| Impeller Material | 16Mn | Fully welded, reinforced. |
| Shaft Material | 45# Steel (or 40Cr) | High strength steel for torque transmission. |
| Housing Thickness | 6mm – 20mm (16Mn) | Based on pressure rating and size. |
| Bearings | Spherical Roller | Heavy-duty, grease or oil bath lubricated. |
| Drive Type | Direct Drive or Pulley | Often VFD compatible for precise air control. |
Potential Issues to Watch For
- Vibration: A fan made of 16Mn is heavy. Ensure the base frame and foundation are reinforced concrete or heavy steel to avoid resonance.
- Corrosion: 16Mn is not stainless. If the intake air is humid or contains corrosive chemicals, consider an epoxy coating or upgrade to Q345R with a liner.
- Balance: High-speed FD fans require G6.3 dynamic balancing or better. Insist on a balance report.
- Weld Quality: 16Mn requires pre-heating for thicker sections (usually >20mm) to prevent cracking. Request NDT (Magnetic Particle or Ultrasonic) testing for welds.
Common Equivalent Specifications (For Sourcing)
If you are looking for a replacement or sourcing from a non-Chinese manufacturer, use these keywords:
- For Draft Fan, Rolled Steel Housing, High Efficiency
- Material: ASTM A516 Gr. 60 | EN S355J2
- Application: Power Plant Boiler / Industrial Boiler Combustion Air
Would you like to know the typical power consumption (kW) calculations for this type of fan, or do you have specific dimensions/flow rate requirements?
