Welding in Confined Spaces

• Obtain both a confined space permit and hot works permit before starting
• Provide continuous forced ventilation supplying fresh air and extracting fumes
• Wear a personal gas monitor and ensure the top person monitors readings
• Use 110V or battery-powered welding equipment to reduce electric shock risk
• Keep shielding gas cylinders outside the confined space with hoses fed in
• Maintain continuous communication with the standby person at the entry point
• Position a fire extinguisher at the entry point ready for immediate use
• Ensure the rescue plan accounts for the welder and all equipment in the space
• Take regular breaks outside the space to recover from heat and fume exposure
• Remove all welding equipment from the space during breaks and at completion

• DON'T weld in a confined space without both required permits in place
• DON'T rely on natural ventilation alone — forced extraction is essential
• DON'T take gas cylinders inside the confined space under any circumstances
• DON'T continue welding if the gas monitor alarm sounds — exit immediately
• DON'T use mains voltage welding equipment inside confined spaces
• DON'T leave the standby person's position unattended during the welding operation
• DON'T ignore signs of dizziness, headache, or nausea while welding inside
• DON'T start welding before confirming ventilation is operating and effective
• DON'T allow combustible residues to remain in the space before hot works begin
• DON'T re-enter after evacuation until the atmosphere has been re-tested and cleared

See also: Welding Safety Awareness (Comprehensive) | Hot Works in Confined Spaces