CLEANING OF EQUIPMENT FOR OXYGEN SERVICE - AIGA

50
AIGA 012/04
Appendix F: Cleaning of parts in an ultrasonic bath using an aqueous cleaning
agent
1. Size of Parts
Generally up to 500 mm, depending on the capacity/dimensions of the bath.
2. Material of Parts
Steel, copper alloys. Cleaning of outer/inner surfaces.
3. Cleaning Method
Immersion in ultrasonic bath with/without pre-cleaning.
3.1 Cleaning Agent
20 % agent in water concentrate pH = 10
3.2 Pre-cleaning
In bath with or without ultrasonic.
Duration : 15 min.
Temperature : approx 60°C.
Solution circulated by pump or slight manual movement of the basket containing the parts.
3.3 Cleaning
In ultrasonic bath (same conditions as in pre-cleaning bath).
If oil spots are visible on the solution surface, this solution has to be renewed as well as the solution in
The pre-cleaning bath. Used solution has to be disposed.
4. Rinsing
Immersion in bath/spraying as an alternative; with at approx. 40 °C.
5. Drying
Purging with dry, oil free air or nitrogen.
6. Inspection Method:
Certificated spot checks by wipe test or water break test.
7. Conservation of cleanliness
Packed in clean plastic bag and sealed.
8. Labelling
With a label “Cleaned for oxygen service. Keep free from oil and grease. Inspection date/stamp”;