Image presentation about
Line Stopping
Size on size line stop fitting with completion plug
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Line stopping (Sandwich) valve
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Line stopping machine is installed
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Line stop goes down and valve is opened
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Line stop is installed
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Line stop is installed against the flow direction
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Line stop now is in the right position
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Vent off product
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Mid section can now be cut
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Inside the run pipe
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After modification/repair..
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Upstream head is removed first
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Followed by Downstream plugging head
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Bypass can now be de-commissioned
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Completion plug is lowered through valve into throat of flange
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Drive Segment is advanced to secure plug in position of flange
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O Ring provides pressure seal
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All fittings blanked off - Job complete
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