5.0
Pigging
A.
Close water valves #1 and 2.
B.
Close valve at shore receiving station.
C.
Disconnect flexible pipe from shore receiving station.
D.
Connect pig receiver to the shore end of the flexible pipe.
E.
Open pig launcher flange on the winch and insert one pig.
F.
Close pig launcher flange. Check that air supply is properly connected.
G.
Open gate valve #2. Gate valve #1 must remain closed.
H.
Open air supply valve #3.
I.
The pig will then travel through the entire flexible line until it is trapped in the pig receiver, at the shore.
Approximately 1,500 gallons of water will be discharged at the shore. Pigging time is approximately 15 minutes.
J.
When the pig arrives in the receiver, stop the air flow by closing the air supply valve #3. Close gate valve #2.
