AWS F3.1 : 1989
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
GUIDE FOR WELDING FUME CONTROL
23-07-2013
12-01-2013
Personnel
Foreword
1. Scope
2. Welding Fume Hazards
2.1 Types of Contaminants
2.2 Overexposures
3. General and Dilution Ventilation
3.1 General Ventilation
3.2 Dilution Ventilation
4. Local Exhaust Ventilation Control
4.1 General
4.2 Equipment
5. Local Exhaust Ventilation Design Procedure
5.1 Procedure and Phases
5.2 Exhaust Subsystems
5.3 Minimum Air Velocities
5.4 System Sizing
5.5 System Balancing
5.6 System Design
5.7 Example Calculations
6. Local Exhaust Ventilation Equipment
6.1 Freely Suspended Hoods
6.2 Crossdraft Table
6.3 Downdraft Table
6.4 Enclosing Hood
6.5 Open Hood
6.6 Gun-Mounted Exhaust Hood
7. Example Design Calculations for Welding Bench Hood
7.1 Hood Type
7.2 Calculations
8. Ventilation System Evaluation
8.1 Basic Relationships: Air Velocity, Pressure and
Volume Flow Rate
8.2 Testing and Maintenance
8.3 Static Pressure Analysis
8.4 Fan Performance
8.5 Fan Horsepower
8.6 System Evaluation Summary
8.7 Ventilation Evaluation Equipment
8.8 Safety
9. Respiratory Protection
10. References
FIGURES
1. Duct Friction Loss
2. Elbow Pressure Loss
3. Branch Duct Entry Pressure Loss
4. Freely Suspended Open Hood
5. Movable
6. Crossdraft Table
7. Downdraft Table
8. Enclosing Hood
9. Open Hood with Welding Operation at Face
10. Hood Mounted on Welding Gun
11. Pitot Tube
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