Page 426 - Pipeline Pigging Technology

Pigging through Yfittings

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

26 .41 FPS 28 NO FLOW
(102 GPM)

28 .63 FPS 27 100-200
(145 GPM) GPM
20 .66 FPS 33 400-550
(163 GPM) GPM

32 .74 FPS 22 NO FLOW
(173 GPM)
28 1.35 FPS 35 400-550
(333 GPM) GPM
23 1.73 FPS 28 NO FLOW
(425 GPM)
32 1.78 FPS 42 NO FLOW
(437 GPM)
31 2.08 FPS 8 NO FLOW
(484 GPM)

33 2.23 FPS 27 100-200
(518 GPM) GPM
30 2.40 FPS 10 NO FLOW
(559 GPM)
51 3.68 FPS 7 NO FLOW
(855 GPM)
25 6.90 FPS 1 18 NO FLOW
(1,698 GPM)

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

Table 4. TDW dual-diameter (14 x 10) scraper pig (using water).

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