PRE-TREATMENT , SURFACE PREPARATION , DEGREASING & CLEANING
PRE-TREATMENT , SURFACE PREPARATION , DEGREASING & CLEANING
Guide to Oxygen Cleaning standards for service components
The current pandemic has increased the demand for Oxygen cleaning of services to treat patients with the Covid-19 symptoms . The first line of attack by the virus is the respiratory system so in many cases oxygen is administered as part of the treatment . The massive demand in the need for respirators and installation of new and extended oxygen systems in hospitals , clinics and care homes with the provision of ancillary pressure reduction and delivery systems has led to a massive increased demand for the valves , fittings and pipelines which control the supplies from storage tanks and cylinders all of which need critical cleaning .
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High KB value for removal of organic residues , compatible with organic and synthetic oils and most plastics and metals , non-flammable , with zero ozone depletion ( ODP ) and global warming potential ( GWP ).
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Solvent of choice for critical cleaning
ProSolv ® 5408e has a unique range of characteristics make it the solvent of choice for critical cleaning applications such as oxygen components and service line cleaning , aircraft avionics and aerospace parts and servicing , precision optics , medical and high vacuum components and electronics .
ProSolv ® 5408e can be used in most solvent cleaning systems , one tank vapour degreasing or multi tank immersion / vapour tank systems using ultrasonics or flush cleaning for complex mechanical and electronic components with blind holes and channels and close mounted electronics or for removing grinding and buffing soils on surfaces .
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Component cleaning for Oxygen service
Cleaning for oxygen service is best defined as the removal of combustible contaminants from the surface of any equipment or system in oxygen service . Essentially , any component that may encounter an oxygen rich environment .
The combustible contaminants include organic and inorganic substances such as hydrocarbon material for example oils and greases , paper , fibre , dust , and soils . If these contaminants are not removed properly , in a worst-case scenario , this can cause combustion or explosion in an oxygen atmosphere or at the least rejection of the product due to unacceptable product purity .
Oxygen is not flammable , but it supports combustion . Oxygen can react with most materials . The higher the oxygen content and / or pressure in a system the more vigorous the combustion and the lower the ignition temperature required . Materials that do not normally ignite in air will burn and may explode in an oxygen rich environment . In addition , the oxygen rich environment will give rise to a higher flame temperatures and combustion velocity with potentially devastating consequences .
The recognition of oxygen ’ s reactivity has led to stringent requirements regarding the cleanliness of equipment in oxygen service . Strict guidelines exist to ensure that care must be taken in the selection of equipment including all materials and components , which all need to be oxygen compatible . They must also be free from combustible contaminants as described above .
Special consideration must be given to any cleaning processes employed in the manufacture and maintenance of all components of oxygen service systems .
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42 MARCH 2021 read online : www . surfaceworld . com