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Fire Smoke Exhaust Fan - GB51251-2015 National Standard Interpretation and Selection


Fire Smoke Exhaust Fan - GB51251-2015 National Standard Full Interpretation

Fire smoke exhaust fans are the core equipment of building fire protection systems, responsible for expelling toxic smoke and buying time for personnel evacuation during fire incidents. According to the "Code for Fire Protection Design of Buildings" GB50016 and "Technical Standard for Smoke Management and Exhaust Systems in Buildings" GB51251-2015, exhaust facilities must be installed in underground rooms exceeding 100㎡ and evacuation corridors exceeding 20m in length.

Importance of Fire Smoke Exhaust Fans

Core Functions

  • Expel toxic high-temperature smoke during fires (above 280°C)
  • Maintain positive pressure in evacuation passages to prevent smoke intrusion
  • Create favorable conditions for fire rescue
  • Reduce temperature damage to building structural components

Xinfeng fire smoke fans are all certified by the Ministry of Public Security Fire Products Quality Certification Center (CCCF), complying with GB51251-2015 and GB12361-2013 standards.

GB51251-2015 Core Requirements

Key Clauses Interpretation

Clause Requirement Xinfeng Configuration
4.7.2 Exhaust fan must operate continuously at 280°C for 30min Fireproof materials + high-temperature bearings
4.7.5 Fan room fire resistance grade ≥2.0h Fireproof partition walls + fire doors
5.2.2 Exhaust volume calculated by air change rate Precise air volume calculation
5.2.8 System worst-loop volume ≤10% CFD simulation optimization
6.3.1 280°C fire smoke exhaust damper at fan outlet Standard eutectic alloy valve

CCCF Certification Requirements

  • Type test report (air volume, pressure, noise, vibration)
  • Fire resistance test (280°C×30min)
  • Electrical safety test (insulation, grounding, leakage current)
  • Certification valid for 5 years, annual supervision inspection

Xinfeng Fire Smoke Fan Products

XFJ-FR Series Fire Smoke Exhaust Fan

Parameter Specification
Certification CCCF certified, certificate number verifiable
Temperature 280°C continuous operation 30min, no deformation
Air Volume 5,000-50,000 m³/h
Material Carbon steel/304 stainless steel

XFJ-FR-H Series High-Temperature Fire Fan

Parameter Specification
Temperature Resistance 500°C, continuous operation 1h
Industry Metallurgy/glass industry specialized
Design Special fireproof materials + water-cooled bearings

XFJ-FR-B Series Explosion-Proof Fire Fan

Parameter Specification
Explosion-Proof Ex d IIB T4 Gb explosion-proof certification
Environment Chemical plants/gas stations specialized
Feature Meets both fire and explosion-proof requirements

Selection Guide

By Installation Position

Type Installation Position Air Volume Range Xinfeng Model
Roof Fire Smoke Exhaust Fan Roof 5,000-50,000 m³/h XFJ-FR-T
Ceiling Fire Smoke Exhaust Fan Inside ceiling 3,000-30,000 m³/h XFJ-FR-D
Vertical Fire Smoke Exhaust Fan Machine room 10,000-100,000 m³/h XFJ-FR-V
Duct Fire Smoke Exhaust Fan In duct 2,000-20,000 m³/h XFJ-FR-P

Selection Parameters

Parameter Description Xinfeng Configuration
Exhaust Volume Calculated by GB51251 formula Space volume × air change rate
Exhaust Temperature 280°C (flue gas temperature) Fireproof design
Total Pressure ≥500Pa (considering pipeline resistance) Multi-impeller series
Motor Power 1.2x safety factor 2.2-75kW

Xinfeng Fire Fan Advantages

Advantage Description
Full Product Line CCCF Certification Certificates complete
Complete Fire Resistance Test Reports Can respond to fire inspection
System Design Solutions Ensure smoke exhaust effectiveness
24-Hour Emergency Service Fire equipment allows no compromise
2-Year Warranty Lifetime maintenance

Frequently Asked Questions

Q: Does the fire fan require regular testing?

A: Yes. Monthly manual start test, quarterly automatic start test, annual comprehensive inspection. Xinfeng provides annual maintenance services.

Q: What is the difference between fire smoke exhaust fan and supply fan?

A: Fire smoke exhaust fan expels smoke, supply fan sends positive pressure to evacuation passages. They work together to form a complete smoke management system.

Q: How long is the fire fan certification valid?

A: CCCF certification valid for 5 years, requires renewal. Xinfeng certificates remain valid and can be verified at any time.

Q: What is the delivery time for Xinfeng fire fans?

A: Standard models 10-15 days, custom models 20-30 days. Fire equipment urgent orders prioritized.

Contact Us

Guangdong Xinfeng Fan Co., Ltd.

Item Information
Phone 400-XXX-XXXX
Email sales@gzxffj.com
Website www.gzxffj.com

🔥 Fire equipment allows no compromise!


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