Smoking or open flames should not be permitted where flammable fluids are stored or handled. Clothes that minimize ignition sources should be worn in atmospheres that may contain concentrations of flammable gases.

All major stationary equipment should be properly grounded. Ground connections should be provided between stationary and mobile equipment before any flammable gas is loaded or unloaded. All electrical equipment used in or near flammable-gas loading and unloading areas, or in atmospheres that might contain explosive mixtures, should conform to local fire protection regulations, codes and standards and to the Electrical Code When flammable cryogenic liquids and gases are handled inside, adequate positive mechanical ventilation is necessary. Electrical equipment and wiring must conform to the Electrical code.

Flash-off gas from closed liquid-hydrogen containers used or stored inside should be piped through a laboratory hood to the outside, or should be vented by other means to a safe location. If hydrogen is vented into ductwork, the ventilation system should be independent of other systems, and sources of ignition must be eliminated at the exit.