Helmets, shields and goggles shall not be readily flammable and shall be capable of withstanding cleaning. Helmets shall be provided that protect face, neck and ears from direct radiant energy from the arc. Eye Protection Goggles shall be ventilated to prevent fogging. Lens glass shall be tempered, substantially free from flaws. Lenses shall bear distinctive markings to readily identify source and shade.
Mechanical ventilation can be 'general' or 'local' in design.
General ventilation draws air from the entire work area at a rate of not less than 2,000 cubic feet per minute per welder. Outdoors - Mechanical ventilation is not generally required if there are no obstructions to natural ventilation. Mechanical ventilation is required for confined spaces, areas of obstructed natural ventilation, or locations where hazardous materials may concentrate. When work involves materials that pose a risk of high exposure to toxic materials, ventilation shall be used or the work shall not be performed. When transporting, moving and storing compressed gas cylinders, the valve protection cap shall be in place and secured.