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Line stop is a method used either with a mechanical plug or inflatable plug that temporarily stops the pipe flow in a section of the pipe, to allow for alteration and addition works to be carried out at the pipeline, without stopping or purging the system.

Alstern has more that a decade of experience in line stop operation.


  1. Mechanical or inflatable plugging system for temporary pipe termination
  2. Convenient- Do not require system shutdown
  3. Suitable for high temperature and high pressure system
  4. Do not require drainage or shutdown of the system
  5. Temporary line stop for modification works
  6. Cost effective
  7. No disruption to existing system


  1. Pipe material: Carbon steel, galvanised steel, stainless steel, ductile and cast iron
  2. Pipe diameter: Up to 48”
  3. Pipe medium: Water, oil based solvent, gas, steam, wastewater and fuel (Cold-Tap)
  4. Maximum operating pressure: 500 psi
  5. Maximum operating temperature: 300°C
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