TDW PIG-SIG V - Page 34

29
Section IV – Pipeline Under Pressure
2.0 Continued
Figure 4.8. Brush Threads
I. Attach the PIG-SIG V to the plug holder (Figure
4.9). The retainer balls in the holder should snap
into groove in the PIG-SIG V. Do not let the plug
holder bottom out in the PIG-SIG V. When
properly positioned, there will be end play
between the plug holder and plug (Figure 4.10).
Figure 4.9. Attach PIG-SIG to
Plug Holder
Figure 4.10. PIG-SIG on Plug
⚠
CAUTION
Clean the threads of the THREAD-O-
RING nipple before installing the
PIG-SIG V plug. The plug threads
may gall and/or be damaged if debris
is not removed prior to installation
(Figure 4.8).
⚠
CAUTION
Do not allow the PIG-SIG holder to
bottom out in the PIG-SIG. The PIG-
SIG should have slight movement
when installed on the plug holder.