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you probably know about vacuum barrier corp., <a href="https://vacuumbarrier.com/" id="LPlnk521292">
https://vacuumbarrier.com/</a> <br>
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I adon't know if they would do a retrofit, but wouldn't hurt asking</div>
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As for handling those ice balls... First - make sure there are no LN2 leaks, even small one can cause problems. And what kind of wrapping do you use? My experience is that packaging bubble wrap with some layers of foil works best on such connections.
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Mike</div>
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<p style="font-size:11pt; font-family:Calibri,sans-serif; margin:0"><span>_______________________________________________<br>
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<p style="font-size:11pt; font-family:Calibri,sans-serif; margin:0"><span>Michael Yakimov</span></p>
<p style="font-size:11pt; font-family:Calibri,sans-serif; margin:0"><span>Research scientist</span></p>
<p style="font-size:11pt; font-family:Calibri,sans-serif; margin:0"><span>College of Nanoscale Science and Engineering</span></p>
<p style="font-size:11pt; font-family:Calibri,sans-serif; margin:0"><span>SUNY Polytechnic Institute</span></p>
<p style="font-size:11pt; font-family:Calibri,sans-serif; margin:0"><span> </span></p>
<p style="font-size:11pt; font-family:Calibri,sans-serif; margin:0"><span>253 Fuller rd.
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<p style="font-size:11pt; font-family:Calibri,sans-serif; margin:0"><span>Albany NY 12203</span></p>
<p style="font-size:11pt; font-family:Calibri,sans-serif; margin:0"><span> </span></p>
<p style="font-size:11pt; font-family:Calibri,sans-serif; margin:0"><span>Phone: 518-437-8609 lab</span></p>
<p style="font-size:11pt; font-family:Calibri,sans-serif; margin:0"><span>e-mail: yakimom@sunypoly.edu</span></p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of Metzler, Meredith G. (Fed) <meredith.metzler@nist.gov><br>
<b>Sent:</b> Tuesday, February 28, 2023 3:08 PM<br>
<b>To:</b> labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> [labnetwork] Cryo-piping contractors for LN2 piping sought</font>
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<p class="x_MsoNormal">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.</p>
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<p class="x_MsoNormal">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.</p>
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<p class="x_MsoNormal">Although, we have made many at wrapping and insulating these connection points, we cannot quite get the coverage to eliminate this ice ball.</p>
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<p class="x_MsoNormal">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?</p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Times New Roman",serif"> </span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Times New Roman",serif">Thanks!</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Times New Roman",serif"> </span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Times New Roman",serif">Meredith Metzler</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Times New Roman",serif">National Institute of Standards and Technology, Physical Measurement Laboratory</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Times New Roman",serif">Process Engineer – Center for Nanoscale Science and Technology Facility, NanoFab</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Times New Roman",serif">100 Bureau Drive, Mail Stop 6201, Building 216</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Times New Roman",serif">Gaithersburg, MD 20899</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Times New Roman",serif">301-975-8187</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Times New Roman",serif"><a href="mailto:meredith.metzler@nist.gov">meredith.metzler@nist.gov</a></span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Times New Roman",serif"><a href="https://www.nist.gov/cnst">https://www.nist.gov/cnst</a></span></p>
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