Vetter Pipe sealing bags and bypass bags FS - Manual (Page 10)

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Pipe Sealing- and Bypass Bags
Support suggestion for a pipe opening on the outside
wall
(presented as a diagram)
1 Outside wall with pipe opening
4.3 Blocking a pipeline
The support structure of a pipeline under pressure must never be
removed. Pipe sealing and/or bypass bags could suddenly cata-
pult outwards. During a pressure test nobody is permitted to re-
main in the shafts or on and in the pipelines under pressure.
9 Vetter pipe sealing- and bypass bags are used in different pipe
diameters (refer to the marking on the sealing bags).
9 Select pipe sealing bag, inflation hose, controller and air sour-
ce.
9 There must be no branches, house connections or similar
things in the pipe area to be blocked.
9 If the pipe sealing bag is positioned in the direction of flow
then securing can be made with, for example, securing lines.
9 Connect pipe sealing bags to the inflation hose and controller
and position in the pipe.
9 Secure with securing lines if positioned in the direction of
flow or with the corresponding support if positioned against
the direction flow.
9 Inflate the pipe sealing bag to the permitted maximum opera-
ting pressure from a safe position.
9 If a pipeline has to be blocked with a pipe sealing bag or by-
pass bag then the operating pressure is to be monitored with
the controller (e.g. possible pressure changes caused by devi-
ations in temperature).