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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">Hi Everyone,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">Thank you all for the helpful responses.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">Meredith Metzler<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">National Institute of Standards and Technology, Physical Measurement Laboratory<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">Process Engineer – Center for Nanoscale Science and Technology Facility, NanoFab<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">100 Bureau Drive, Mail Stop 6201, Building 216<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">Gaithersburg, MD 20899<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">301-975-8187<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><a href="mailto:meredith.metzler@nist.gov"><span style="color:#0563C1">meredith.metzler@nist.gov</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><a href="https://www.nist.gov/cnst"><span style="color:#0563C1">https://www.nist.gov/cnst</span></a><o:p></o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Timothy Fuller <tafuller@eng.ucsd.edu> <br>
<b>Sent:</b> Wednesday, March 1, 2023 11:44 AM<br>
<b>To:</b> johnboyle <johnboyle@fast.net><br>
<b>Cc:</b> Collins, Deon <deonc69@illinois.edu>; Metzler, Meredith G. (Fed) <meredith.metzler@nist.gov>; labnetwork@mtl.mit.edu<br>
<b>Subject:</b> Re: [labnetwork] Cryo-piping contractors for LN2 piping sought<o:p></o:p></p>
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<p class="MsoNormal">When I worked at HRL our original installation had KF 25 Buna-N o-rings for the vacuum jacket. After replacing them with Viton o-rings, the vacuum jacket was leak tight.<o:p></o:p></p>
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<p class="MsoNormal">On Wed, Mar 1, 2023 at 4:45 AM johnboyle <<a href="mailto:johnboyle@fast.net">johnboyle@fast.net</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Check Acme Cryogenics, Allentown, PA. They make VIP, phase separators, do installation and repairs. Ask for Field Services<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">John Boyle<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;color:#575757">Sent from my Verizon, Samsung Galaxy smartphone<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">-------- Original message --------<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">From: "Collins, Deon" <<a href="mailto:deonc69@illinois.edu" target="_blank">deonc69@illinois.edu</a>>
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<p class="MsoNormal"><span style="color:black">Date: 2/28/23 7:46 PM (GMT-05:00) <o:p>
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<p class="MsoNormal"><span style="color:black">To: "Metzler, Meredith G. (Fed)" <<a href="mailto:meredith.metzler@nist.gov" target="_blank">meredith.metzler@nist.gov</a>>,
<a href="mailto:labnetwork@mtl.mit.edu" target="_blank">labnetwork@mtl.mit.edu</a>
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<p class="MsoNormal"><span style="color:black">Subject: Re: [labnetwork] Cryo-piping contractors for LN2 piping sought
<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Your vacuum jacket has failed. We are going through the same situation with our static LN2 delivery lines.
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Is your phase separator a Static or Dynamic system?<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>From:</b> labnetwork <<a href="mailto:labnetwork-bounces@mtl.mit.edu" target="_blank">labnetwork-bounces@mtl.mit.edu</a>>
<b>On Behalf Of </b>Metzler, Meredith G. (Fed)<br>
<b>Sent:</b> Tuesday, February 28, 2023 2:08 PM<br>
<b>To:</b> <a href="mailto:labnetwork@mtl.mit.edu" target="_blank">labnetwork@mtl.mit.edu</a><br>
<b>Subject:</b> [labnetwork] Cryo-piping contractors for LN2 piping sought<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">We are hoping the community can assist us in identifying a vendor who can inspect an existing LN2 delivery piping system in the cleanroom for our cryo-etch tools. We've recently
started experiencing issues with a phase separator that keeps building up a large block of ice on the outside of it.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">We have a 5 Gallon phase separator made by Chart Inc. with one outlet. It feeds liquid nitrogen to several tools in the etch bay of the cleanroom. The LN2 system is house regulated
to 40 PSI at the inlet. The unit separates the gaseous N2 from the liquid. The liquid is stored in the 5 gallon volume surrounded by a vacuum jacket to prevent icing. The final LN2 inlet connection to the phase separator, the exhaust connection, and the over
pressure relief connection seem to be the biggest points of failure. At these three points we have cold air and moisture condensation that forms an ice ball.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Although, we have made many at wrapping and insulating these connection points, we cannot quite get the coverage to eliminate this ice ball.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Does the community have any preferred cryo-piping contractors they can recommend to assist with solving this issue and any of our future cryo-piping needs?<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">Thanks!</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">Meredith Metzler</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">National Institute of Standards and Technology, Physical Measurement Laboratory</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">Process Engineer – Center for Nanoscale Science and Technology Facility, NanoFab</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">100 Bureau Drive, Mail Stop 6201, Building 216</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">Gaithersburg, MD 20899</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">301-975-8187</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><a href="mailto:meredith.metzler@nist.gov" target="_blank">meredith.metzler@nist.gov</a></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><a href="https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.com%2Fv3%2F__https%3A%2Fwww.nist.gov%2Fcnst__%3B!!DZ3fjg!-6Lfwk5cCgFK0WcjbkRqEZm2A8T7loqa2OV_9x-WW72ajmC1A4euSzW2VyRMpj0J8yR1_DdWvG0axt3nRQj-R1EmQJ2lypVZ%24&data=05%7C01%7Cmeredith.metzler%40nist.gov%7Cf95391a790e34259dfc408db1a74248c%7C2ab5d82fd8fa4797a93e054655c61dec%7C1%7C0%7C638132858369919538%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=FpntaUfl0pARpQK82TN%2F36q6F7PRiT635RFPG5rlBxM%3D&reserved=0" target="_blank">https://www.nist.gov/cnst</a></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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