Low Pressure Inlet Pigging

Question 1

What safety step should be performed prior to pigging.

Answer 1

Ensure that gauge root valves are open,

Perform purge on pig Trap to remove O2.

Question 2

What is the valve line up when receiving a pig?

Answer 2

Vents closed.
Bypass Open.
Trap Isolation valve open.
Mainline valve closed.