Figure 3-6. Air Station Air Valve and Quick Disconnect
Operating compressed air station 6 to power the PIG
Shore discharge hose must remain free of oil and dirt. Use only designated 25 foot
air hose on compressed air station 6 for supplying compressed air to power PIG
through shore discharge hose.
Hold a dry, clean white cloth in front of air station 6 air outlet and open air valve by turning valve
counterclockwise. Blow compressed air through cloth. Smell air coming out of air valve. If air smells oily or
specks of dirt or oil and grease show on white cloth, check oil level in air compressor. If overfilled, drain to
authorized level Change air filter 2 by following procedures in paragraph 4-5.3 and again check air quality with
white cloth. Continue to troubleshoot and change air filter 2 until air from air station 6 is free of oil smell and stain.
Close shore discharge valves SD1 and SD2 by turning clockwise until tight.
On PIG launcher insertion point, unlock two quick disconnect couplers and pull cap off insertion tube (Figure 3-7).
Insert clean PIG into tube, replace cap, and lock two quick disconnect couplers.
Connect designated 25-foot airhose to compressed air station 6 quick disconnect coupling and to compressed air
fitting on PIG insertion point cap (Figure 3-7).
Make sure PIG receiver has been installed on shore end of shore discharge hose and is ready to receive PIG.
Open shore discharge valve SD2 by turning counterclockwise until it stops.
Notify all crewmembers not to use any other compressed air stations until PIG has pushed all water out of shore
discharge hose h. Open compressed air station 6 air valve by turning valve counterclockwise until it stops.
PIG normally takes about 15 to 20 minutes to push water out of shore discharge
When PIG arrives in PIG receiver onshore, close compressed air station 6 air valve by turning clockwise until it