Pipeline maintenance

The "Interventions" activity covers various operations related to pipeline inspection and maintenance. These operations generally require the implementation of pumping and compression equipment:

• Regulatory hydraulic tests in compliance with the order
  "multi-fluids" of 4 August 2006 (amended by the order of 20 December 2010).
• Gas pipe drying - essentially with the dry air (or nitrogen) method.
• Mechanical cleaning using pigs.
• Inerting and putting abandoned pipelines under neutral atmosphere.
• Cryogenic plugging (creating a temporary valve by locally freezing the liquid in the pipeline).