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NSTALLATIONS AT PETROLEUM RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT F ACILITIES CLASSIFIED AS CLASS I, DIVISION 1 AND DIVISION 2 61 Sample valve, bleed valve, or similar device 0. dewi88 5 m (18 in. smp negeri 99 jakarta ) 0 5 m (18 in ) 0 5 m (18 in ) 1 m (3 ft ) Gas operated surface safety valve actuator vent port Division 1 Division 2 Figure 39—Flowing Well in a Nonenclosed