Cleanroom And Oxygen Cleaning Requirement; Check List - POSEIDON Xstream Series Service Manual

aPPENDix D
APPENDIX D

Cleanroom and oxygen cleaning requirement

Check list

1. Cleanroom / work environment requirements
1.1 The work area must be dedicated only for oxygen servicing. Ideally a separate room or at least a space clearly marked out as an oxygen
clean area, e.g. by floor marking, signs, and/or screens. Ceiling, walls, and floor shall be non-contaminant producing and be easily cleaned.
If the location is not sufficient in this respect, sheets of polyethylene plastic can be taped to fully surround the work area.
1.2 The work area must be free from airborne dust and droplets. It shall never be close to areas where machining takes place, compressors are
running, or other activities which can produce a mist containing hydrocarbons or other flammable or particulate contaminants.
1.3
The work bench shall be sufficient in size as to enable a good organization of equipment, tools and the regulator parts. A clean polyethylene
plastic sheet shall be used to protect the work bench. It is recommended to have a roll of plastic sheet at one end of the work bench. Used
sheets shall be disposed if there are any signs of contamination.
1.4 Items incompatible with oxygen such as e.g. hydrocarbon oil and grease must not be stored or ever used in the area.
1.5
Oil, grease, residue, spilled chemicals, and any foreign material which develop in the area shall be cleaned immediately. At least monthly the
clean room shall be completely cleaned.
1.6 It is recommended to keep cleanroom temperature close to standard room temperature and humidity less than 50%. Since all tools will be
kept free from grease, the risk of them rusting increases the higher the humidity.
1.7
It is recommended to see to that the work area maintain a slight positive pressure so that the air flow will always be outward from the clean
area.
1.8 The following activities are absolutely prohibited inside the cleanroom area:
• Smoking
• Eating
• The use of car heaters
2. Personnel clothing requirements
2.1 The special clothing as described below must not be worn or taken outside the cleanroom.
2.2 Lint free gloves shall be worn. Regard everything you touch as contaminated, unless you are sure it is clean. This means you shall replace
your gloves if they have been in contact with something you can suspect being contaminated.
2.3 In the clean room a hair net and a coverall / laboratory coat shall be worn.
2.4 These requirements apply to anyone being in the cleanroom, including visitors and observers.
3. Tools and equipment requirements
The cleaning procedure as described for the regulator also applies to all tools and equipment used.
3.1 All tools and equipment used must be cleaned and kept clean. It must be ensured that tools and equipment from this area is not shared with
other servicing locations. Tools used to disassemble the regulator must be regarded as contaminated, and cannot be used for assembly
unless they have been cleaned after the disassembly stage. We therefore recommend having two sets of the required tools, one of which is
always kept clean.
3.2 Tools have to be re-cleaned every month or after 10 serviced regulators, whichever comes first.
3.3 An ultra-sonic cleaner Poseidon XXXX shall be used. In addition to the instructions for use and maintenance in the users manual, the bath
shall be cleaned with IPA and a lint free mop or lint free paper on a regular basis, or when contamination can be suspected. This is to ensure
that a possible trace of an oil-film on the inside of the bath is removed.
3.4
The solution in the ultrasonic bath shall be replaced after a) maximum 30 times of use, b) earlier if signs of contamination is present, c) at
least every fourth week.
4. Rinsing water requirements
4.1 Water quality must be in level with or better than:
Chloride ion (ppm)
Conductivity (μΩ/cm )
3
Resistivity (cm 3 /Ω)
pH
Visual clarity
4.2 A chemical analysis of the water quality shall be conducted at least annually by an independent laboratory.
5. Gas requirements
5.1 Gas used for blow-guns and for regulator testing must fulfill the following requirements:
Maximum level of:
CO
CO
2
Water dew point
Lubricants (droplets/mist)
Water
Gaseous hydrocarbons
Condensed hydrocarbons
Solid particles
5.2 A gas analysis of the gas quality shall be conducted at least annually by an independent laboratory for the gas used to dry cleaned parts.
5.3 It is strongly recommended to use filtered air for the purpose of drying and regulator testing.
6. Disposal
6.1 Disposal of water shall be in accordance with local, state, or federal regulations
7. Documentation
7.1 The Poseidon Oxygen Service Center must have documented maintenance procedures/routines covering:
7.1.1 Cleanroom cleaning
7.1.2 Tool cleaning
46
1,0 maximum
20 maximum
50K minimum
6-8
No turbidity, oil, or sediment
2 ppm
500 ppm
-45ºC (-50°F)
0.5mg/ m 3
35 mg/ m 39ppm
3
15 ppm
0.1 mg/m
3
2 microns
SERviCE maNual - xSTREam
OK
OK
OK
OK
OK
OK
OK