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29 CFR 1910.1450 Laboratory Safety Standard. Chemical Hoods Conventional Bypass Auxiliary Air Bypass Re-circulating/Ductless. Non-Chemical Hoods BioSafety Cabinets Laminar Flow Hoods. Chemical Hood Types. Unstable Set- Up Flammable and Toxic Atmospheres. Unsafe Experiment. - PowerPoint PPT Presentation
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Laboratory Safety-Fume Hoods
29 CFR 1910.1450Laboratory Safety Standard
Laboratory Safety-Fume Hoods
Chemical Hoods
•Conventional
•Bypass
•Auxiliary Air Bypass
•Re-circulating/Ductless
Non-Chemical Hoods
•BioSafety Cabinets
•Laminar Flow Hoods
Laboratory Safety-Fume Hoods
Horizontal Sash Vertical Sash
Combinations Canopy
California Slotted
Walk-in Etc.
Chemical Hood Types
Laboratory Safety-Fume Hoods
Unstable Set- Up
Flammable and Toxic Atmospheres
Laboratory Safety-Fume Hoods
Unsafe Experiment
Laboratory Safety-Fume Hoods
Chemical Contamination
Laboratory Safety-Fume Hoods
Proper Set Up:
Brightly Illuminated
Clean
Apparatus 6” Inside
Slots Unobstructed
Laboratory Safety-Fume Hoods
Unsafe
Lab
Practice
Laboratory Safety-Fume Hoods
Unsafe
Lab
Practice
Laboratory Safety-Fume Hoods
Safe
Lab
Practice
Laboratory Safety-Fume Hoods
Restricted Airflow
Chemical Escape
Incompatible Chemicals
Chemical Contamination
Improper Chemical Storage
Laboratory Safety-Fume Hoods
Proper Chemical Storage
Hazard Class
Secured
Labeled
Dry
Laboratory Safety-Fume Hoods
Side or Rear
6” Beyond Sash
Maximum 25% Slot Blockage
Proper Material Storage
Laboratory Safety-Fume Hoods
Sash Restricted
Slot Opening Blocked
Airflow Restricted
Limited Protection
Improper Equipment Storage
Laboratory Safety-Fume Hoods
Elevate Apparatus
Promote Airflow
Contain Contaminants
Proper Equipment Storage
Laboratory Safety-Fume Hoods
Unsafe
Illegal
Improper Waste Disposal
Laboratory Safety-Fume Hoods
One-Third Opening
Chemical Exposure
Explosion Protection
Fire Containment
Closed Sash Position
Laboratory Safety-Fume Hoods
Set Up
Tear Down
Hazard Absent
Open Sash Position
Laboratory Safety-Fume Hoods
Limited Protection
Report Damage
Repair Before Using
Damaged Sash
Laboratory Safety-Fume Hoods
Reduced Air Velocity
Fire/Explosion
Chemical Exposure
Raised Sash (Unattended)
Laboratory Safety-Fume Hoods
Increased Air Velocity
Contain Fire/Explosion
Limit Exposure
Lowered Sash (Unattended)
Laboratory Safety-Fume Hoods
Unrestricted Traffic
Air Turbulence
Room Depressurized
Chemical Exposure
Fire and Explosion
Open Lab Door
Laboratory Safety-Fume Hoods
Control Foot Traffic
Limit Turbulence
Room Pressurized
Limit Chemical Exposure
Contain Fire and Explosion
Provide Security
Closed Lab Door
Laboratory Safety-Fume Hoods
Ventilation Measurements
Various Test Methods
Face Velocity Measurements
Sash Height
Hood Contents
Hood Performance
Laboratory Safety-Fume Hoods
Ventilation Smoke
Flow Patterns
Laminar Flow
Turbulence
Eddy Currents
Back Drafts
Hood Performance
Laboratory Safety-Fume Hoods
Certification Approval
Caution Information
Hood Performance
Laboratory Safety-Fume Hoods
Danger Notice
Do Not Use
Hood Performance
Laboratory Safety-Fume Hoods
Tissue Paper
Ribbon
Hood Performance
Laboratory Safety-Fume Hoods
Flow Indicator
Static Pressure
Acceptable Range
Alarm Mechanism
Test Alarms
Hood Performance
Laboratory Safety-Fume Hoods
Flow Indicator
Air Velocity
Acceptable Range
Alarm Mechanism
Test Alarms
Hood Performance
Laboratory Safety-Fume Hoods
Ventilation System
Duct Work
Fan
Exhaust Stack