What kind of storage is NOT permitted for gas cylinders during welding?

Storing gas cylinders on the floor without any secure attachments poses significant safety risks. When cylinders are not properly secured, they can easily tip over, leading to leaks or even catastrophic events such as explosions or fires. Proper storage guidelines emphasize the need for stable and secure placements to prevent accidents.

In contrast, gas cylinders stored in a locked storage unit, on a wheeled carrier, or attached to a secure frame are compliant with safety regulations. These methods allow for safe handling and minimize the risk of accidental release of gas.

Using a locked storage unit helps prevent unauthorized access, while a wheeled carrier provides mobility without compromising stability. Additionally, securing cylinders to a frame ensures that they remain upright and less likely to be damaged. Each of these methods aims to maintain safe practices around potentially hazardous materials during welding operations.