1.1 This specification covers requirements for HCFC Blend B as a fire-fighting medium. 1.2 This specification does not address the fire-fighting equipment or hardware that employs HCFC Blend B or the conditions of employi This specification covers requirements for HCFC Blend B as a fire-fighting medium. The fill density of HCFC Blend B within a container should not exceed that needed to achieve complete filling of the container at the maximum envisaged storage temperatu