CLEANING OF EQUIPMENT FOR OXYGEN SERVICE - AIGA

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AIGA 012/04
Cleaned components shall be stored until installation in a suitable dedicated area free from
contamination.
The packing shall not be opened until the equipment is ready to be installed. Prior to installation, the
cleanliness shall be checked again to ensure that the specified standard has been maintained, and
that the equipment is suitable for oxygen service.
9 Design and manufacturing considerations for cleanliness
The ability to clean, and the method(s) to be used shall be considered in the design and manufacture
of equipment and components for oxygen service.
Where possible, components shall not have recesses that cannot be directly inspected for
cleanliness.
Preferably, components shall be cleaned prior to assembly, and cleanliness maintained throughout
assembly and testing.
Where this is not possible, trial assemblies shall be dismantled after cleaning and components
examined for cleanliness.
Only approved lubricants shall be used in the assembly of components.
The root weld run on piping systems and small pressure vessels should utilise welding process 141
[Tungsten inert gas arc welding (TIG welding)] to IS0857/IS04063, in order to ensure a smooth root
weld profile on the surface exposed to oxygen.
9.1 Quality Assurance for Cleanliness when Buying Equipment or Components
Any supplier or sub-contractor supplying or cleaning equipment or components for oxygen service
shall be evaluated.
Quality records of acceptable suppliers and sub-contractors shall be maintained.
Evaluation and records shall include, where appropriate:
- Cleaning methods, equipment and fluids.
- Method(s) used to evaluate cleanliness.
- Training and experience of operatives.
- Methods used to ensure cleanliness during testing.
Records of inspections for cleanliness witnessed or subsequently carried out by the purchaser.
Methods used to maintain cleanliness up to and during storage.