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One tool available for maintaining the level of safety as designed and getting continuous information and confirmation on the installation is to develop comprehensive maintenance programs.

Maintenance is in general of two types:

  • Preventive maintenance
  • Corrective maintenance

Corrective maintenance is the undesirable type, which is used to repair components after they failed. In hydrogen installations, due to high hazards it is very important that the component of preventive maintenance is prevailing and based on more generic maintenance philosophies and extensive surveillance programs of the installation. Surveillance programs cover not only preventive actions included in the preventive maintenance program, but also extensive testing program for active (pumps, compressors etc) and non active components (pipes, valves etc)

Preventive maintenance is based so that a series of repairs and tests are performed to assure that the failure rates of the components did not increase and hence the risk is being kept at the level evaluated before the installation was started. Degradation in time of the reliability parameters (“aging effects”) is compensated by flexible programs for monitoring of the passive elements mainly as well as by systematic full tests of the installation. The tests and repairs are done based on a pre-approved program so that the production goals will be also achieved.

The tests and repairs are also component specific (pipes, valves, compressors etc) require extensive knowledge from databases on components for hydrogen installations. Since the installations are in the beginning of their industrial use the databases of such type are a critical point of the maintenance programs

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Page last modified on December 17, 2008, at 09:32 AM