Lethal Service Graphite Design

UIG-2(c): Associated metal parts must be design to Division 1 rules.

UIG-23(b): Design factor increased from 6 to 7.

UIG-60: Various lethal service requirements.

              "It is strongly recommended that owners/users monitor the permeability of graphite equipment in lethal service."

UIG-99: Pressure test multiplier increased from 1.5 to 1.75.