I use dilute acetic acid to remove any existing corrosion, and then a non-solvent hydrocarbon-free detergent solution to clean, followed by a freshwater rinse, and possibly another cycle using a separate clean batch of detergent solution. Use dedicated brushes for each bin. A lint-free cloth should come back clean, and the cleaner solution and rinse water should both produce no fluorescence under UV (black light). Dry passively, or with filtered air or bottled nitrogen so as not to reintroduce any contaminants. Any subsequent lubrication or assembly with lubricated soft parts should be done with oxygen compatible lubricants (i.e. Christolube).<br><br>Sean<br><br>Sent from ProtonMail mobile<br><br><br><br>-------- Original Message --------<br>On Jan 6, 2018, 09:23, Steve McQueen via Personal_Submersibles < personal_submersibles@psubs.org> wrote:<blockquote class="protonmail_quote"><br><html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><meta name="Generator" content="Microsoft Word 15 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body><div class="WordSection1"><p class="MsoNormal">All, I am working on cleaning some parts/pieces for O2 service on my K-250. I am buying most items “pre-cleaned” such as: Tank w/Valve, First Stage Regulator, Thru Hull Isolation Valve, Flow Regulator.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">However, I will have some parts & pieces (mainly misc. adaptors and ¼ SS tubing) I may still need to clean.<o:p></o:p></p><p class="MsoNormal" style="mso-margin-bottom-alt:auto;line-height:13.5pt;background:white">I know an “at home” process will fall short but looking to create/document a procedure anyway.<o:p></o:p></p><p class="MsoNormal" style="mso-margin-bottom-alt:auto;margin-left:0in;text-indent:-.25in;line-height:13.5pt;mso-list:l0 level1 lfo1;background:white"><!--[if !supportLists]--><span style="font-size:10.0pt;font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman""> </span></span></span><!--[endif]-->I am using ASTM G93, "Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments" as the standard.<o:p></o:p></p><p class="MsoNormal" style="mso-margin-bottom-alt:auto;margin-left:0in;text-indent:-.25in;line-height:13.5pt;mso-list:l0 level1 lfo1;background:white"><!--[if !supportLists]--><span style="font-size:10.0pt;font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman""> </span></span></span><!--[endif]--><o:p> </o:p></p><p class="MsoNormal" style="mso-margin-bottom-alt:auto;margin-left:0in;text-indent:-.25in;line-height:13.5pt;mso-list:l0 level1 lfo1;background:white"><!--[if !supportLists]--><span style="font-size:10.0pt;font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman""> </span></span></span><!--[endif]-->Maybe someone already has a procedure (or opinion) they want to share?<o:p></o:p></p><p class="MsoNormal" style="mso-margin-bottom-alt:auto;line-height:13.5pt;background:white">Steve<o:p></o:p></p><p class="MsoNormal" style="mso-margin-bottom-alt:auto;line-height:13.5pt;background:white"><o:p> </o:p></p><p class="MsoNormal" style="mso-margin-bottom-alt:auto;margin-left:0in;text-indent:-.25in;line-height:13.5pt;mso-list:l0 level1 lfo1;background:white"><!--[if !supportLists]--><span style="font-size:10.0pt;font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman""> </span></span></span><!--[endif]--><o:p> </o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal" style="mso-margin-bottom-alt:auto;margin-left:0in;text-indent:-.25in;line-height:13.5pt;mso-list:l0 level1 lfo1;background:white"><!--[if !supportLists]--><span style="font-size:10.0pt;font-family:Symbol;color:#333333"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman""> </span></span></span><!--[endif]-->I am using <span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#333333">ASTM G93, "Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments" as the standard. I know an “at home” process will fall short but looking to create/document a procedure anyway.<o:p></o:p></span></p><p class="MsoNormal" style="mso-margin-bottom-alt:auto;margin-left:0in;text-indent:-.25in;line-height:13.5pt;mso-list:l0 level1 lfo1;background:white"><!--[if !supportLists]--><span style="font-size:10.0pt;font-family:Symbol;color:#333333"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman""> </span></span></span><!--[endif]--><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#333333"><o:p> </o:p></span></p><p class="MsoNormal"><o:p> </o:p></p></div></body></html></div>