Adequate ventilation is required during all welding and cutting operations.
Specific requirements are included in Section 5 for natural ventilation versus mechanical ventilation methods. When welding in confined spaces, ventilation shall also be sufficient to assure adequate oxygen for life support. The following precautionary warning, which is supplied with all welding products, should be provided to and fully understood by all employees involved with welding. Caution Welding may produce fumes and gases hazardous to health. Avoid breathing these fumes and gases.