TDW POLYSTOPP, Инструкция по эксплуатации и обслуживанию

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TDW France-22-E-03-09
Section IV: Plugging the Line
1.0 Introduction
This section provides procedures for temporarily plugging 315-355 mm line while work is being performed.
The line may be kept in service during plugging operations by plugging it at two locations to isolate the line
section in between and running a bypass around the isolated area.
2.0 Plugging the Main Line
All parts that makeup the plugging head assembly must be clean and in good condition. Remove all dirt and
any rust scale from all mating surfaces and bolt holes. All internal threads should be inspected for wear, and
a light coating of lubricating oil applied to reduce friction.
If using a plugging machine with a jack, check the drag on the jacking mechanism following the instructions
in Section VI, Maintenance. Make sure this test is done without the sealing element attached.
2.1 Install the Plugging Head
A.
Extend the control bar through the plugging head housing and insert the control bar handles in the
handle connectors. Twist the upper handle to disengage the locking pin. Turn the control bar handles
to align the keyways on the lower end of the external and internal bars, as shown in Figure 28.
Figure 28. Align Control Bar Keyways
B. Plugging head halves are shown in Figure 29.