Pig launcher

Company / operator legend practice (API 6A, API 521, API 537) / PIP PIC001

Drawn as

An enlarged barrel (a fat pipe section) with a quick-opening closure door (thick bar) at the back end, a reducer to the pipeline at the front, a kicker line from the back of the barrel through a valve to the main line, and a flow arrow away from the door.

Meaning

Launches pigs into an export pipeline or flowline. Becomes pig-launcher. A pig signaller (XI) is often drawn on the outgoing line.

Variants

The pig itself may be drawn as a dashed bullet inside the barrel
Pressure gauges, vents and drains on the barrel are typical