Requalification de bouteilles

Reinspection of gas cylinders


Welcome to the Apragaz "reinspection of gas cylinders" laboratory, accessible to both professionals and individuals.

The laboratory offers the following services:

  • Visual control: aimed at validating both the internal and external surface of the container.
  • Hydrostatic test: after the visual inspection, the container is subjected to a pressure test with an incompressible liquid (water or oil) at a pressure which depends on the operating pressure of the container. After this pressure a further visual inspection must be carried out to ensure that the container is not permanently deformed or damaged.
  • Ultrasonic (US) inspection: In some cases, the hydrostatic test is replaced or supplemented by a measurement of the thickness of the cylinder walls.
  • Pneumatic test: Depending on the requirements of certain manufacturers or users, we proceed to pressure build-up using an inert gas. The leakage is then checked by maintaining the pressure on the pressure gauge and using a "1000 Bulles" type leak detector.
  • Additional markings: In the diving world, gas usage is changed regularly. We stamp an official mark on the cylinders in accordance with the previously required regulations.

Bottles that we check

  • Steel, composite and aluminium cylinders.
  • Steel, composite and aluminium firefighter cylinders.
  • Steel, composite, aluminium, forged and welded stainless steel cylinders for the transport of industrial gases.
  • Stainless steel, aluminium welded cylinders for aero states (hot-air balloons).
  • Steel, composite, aluminium cylinders for aircrafts
  • Tanks and reservoirs, LPG LPI
  • CNG cylinders
  • The buffer bottles
  • Cylinder racks
  • Stainless steel sample bottles
  • Various assemblies requiring a test and a water-tightness certificate
  • Safety cylinder (type SIGRI)

Apragaz logo negatif

Our stamp, your safety


Nothing is as important as your safety, that of your family, that of your colleagues or that of your customers, which is why we have been working for more than 90 years to become and remain your inspection body.