Welding Safety, Equipment, and Professional Codes
OSHA requirements, PPE, fire safety, gas cylinder handling, oxy-fuel safety, duty cycle, CWI, CWE, and ASME Section IX.
- Describe PPE requirements and welding fume hazards
- Explain fire safety, hot work permits, and fire watch duties
- Describe oxy-fuel and gas cylinder safety procedures
- Explain duty cycle calculation and welding equipment ratings
- Identify CWI, CWE certifications and ASME Section IX scope
Leçon 1
Welding Fumes and PPE Requirements
Fume Hazards
Welding produces metal fumes and gases that are hazardous to health. Different base metals and coatings produce different fumes. Hexavalent chromium (from stainless steel and chromium-containing alloys), manganese, zinc (from galvanized steel), and lead are among the most dangerous.
OSHA requires employers to assess fume exposure and provide appropriate controls. The hierarchy of controls is: elimination, substitution, engineering controls (ventilation), administrative controls, and lastly PPE.
PPE Requirements
| Protection | Requirement |
|---|---|
| Eyes/Face | Welding helmet with proper shade lens |
| Skin | Flame-resistant clothing, leather gloves |
| Respiratory | Respirator when ventilation is inadequate |
| Feet | Leather boots with non-slip soles |
| Hearing | Protection when noise exceeds 85 dBA |
Galvanized Steel Warning
Welding on galvanized steel produces zinc oxide fumes that cause metal fume fever. Always use adequate ventilation and respiratory protection. Remove the galvanized coating from the weld zone when possible.
Welding fumes are hazardous - hexavalent chromium, manganese, and zinc fumes require proper ventilation and respiratory protection. Always use the correct shade lens, flame-resistant clothing, and leather gloves.