Page 430 - Pipeline Pigging Technology

Pigging through Y fittings

PEAK PIGGING TRANSIT PEAK PIGGING
DIFF PRES SPOOL DIFF PRES FLOW IN
IN TRANSIT AVG VEL IN T" OPPOSITE
SPOOL(PSI) (FLOW RATE) (PSI) SIDE

83 1.04 FPS 59 NO FLOW
(255 GPM)

85 1.64 FPS 48 NO FLOW
(402 GPM)
54 2.59 FPS 2 17 NO FLOW
(636 GPM)
81 2.70 FPS 64 300-450
(665 GPM) GPM
89 3.11 FPS 42 300-450
(764 GPM) GPM
59 4.78 FPS 2 23 NO FLOW
(1,176 GPM)
65 4.78 FPS 1 61 NO FLOW
(1,176 GPM)

1. Pig also passed through Misaligning Flange with 5 degree offset.
2. Pig also passed through Misaligning Flange with 10 degree offset.

Table 8. Vetcolog intelligent pig (using water).

411