CLEANING OF EQUIPMENT FOR OXYGEN SERVICE - AIGA

AIGA 012/04
Table of Contents
1 Introduction ......................................................................................................................................1
2 Scope and purpose..........................................................................................................................1
3 International Agreements/Regulations.............................................................................................1
3.1.1 Ozone Depleting Substances............................................................................................1
3.1.2 Volatile Organic Compounds.............................................................................................2
4 Cleaning methods ............................................................................................................................2
4.1 Procedure and Agent Qualification...........................................................................................2
4.1.1 General..............................................................................................................................2
4.1.2 Selection Criteria ...............................................................................................................3
4.1.3 Additional Technical Criteria..............................................................................................3
4.1.4 Health, Safety and Environmental Aspects.......................................................................4
4.1.5 Costs .................................................................................................................................5
4.2 Typical Methods........................................................................................................................5
4.2.1 Mechanical Cleaning .........................................................................................................5
4.2.2 Chemical Cleaning ............................................................................................................6
4.2.3 Solvent Cleaning ...............................................................................................................8
4.2.4 Detergent Cleaning .........................................................................................................11
4.2.5 High Pressure Hot Water (Steam) Cleaning ...................................................................12
4.2.6 Emulsion Cleaning ..........................................................................................................12
4.2.7 Rinsing.............................................................................................................................14
4.2.8 Drying ..............................................................................................................................14
4.2.9 Removal of Cleaning Agent.............................................................................................15
5 Cleaning materials .........................................................................................................................15
5.1 Mechanical Cleaning Materials...............................................................................................15
5.1.1 Blast Cleaning .................................................................................................................15
5.1.2 Wire Brushes...................................................................................................................16
5.2 Chemical Materials .................................................................................................................16
5.2.1 Alkaline Chemicals ..........................................................................................................16
5.2.2 Acid Chemicals................................................................................................................16
5.2.3 Solvents...........................................................................................................................17
5.2.4 Water Based Detergents .................................................................................................18
5.2.5 Emulsion Cleaners ..........................................................................................................18
5.3 Cleaning Cloths ......................................................................................................................19
5.4 Desiccating Materials .............................................................................................................19
5.5 Drying/Purging Gas ................................................................................................................19
Table 1: Industrial solvents 1 ..................................................................................................................20
Table 2: Alkaline chemical cleaning materials (Also applicable to Alkaline Detergents)......................21
Table 3: Acid chemical cleaning materials............................................................................................22
Table 4: Common components in alkaline detergents and their main function ....................................23
6 Inspection methods and acceptance criteria .................................................................................24
6.1 Introduction .............................................................................................................................24
6.2 Inspection Methods.................................................................................................................24
6.2.1 Direct Visual Inspection with White Light ........................................................................24
6.2.2 Direct Visual Inspection with UN. Light (Black Light) ......................................................25
6.2.3 Wipe Test ........................................................................................................................25
6.2.4 Solvent Extraction ...........................................................................................................25
6.2.5 Water Break Test.............................................................................................................26
6.2.6 Spectrometric, Chromatographic and other Special Methods ........................................26
6.3 Detection Limits ......................................................................................................................27