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Hi Michael,<br>
<br>
I'm sure others will weigh in shortly, but very briefly:<br>
<br>
What we do at CNS is to run a sub-atmospheric regulator on BCl3, so
that we don't have to run any heating tape on the lines. As long as
the supply lines are not so long that elevated pressure is needed to
generate the needed flow rate, running the regulator below
atmospheric pressure avoids condensation, without the need for
supplemental heat.<br>
<br>
<br>
Mac<br>
<br>
<br>
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<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt"><span style="font-size:12.0pt;line-height:115%;font-family:"Times
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<div class="moz-cite-prefix">On 11/17/2022 10:32 AM, Martin, Michael
wrote:<br>
</div>
<blockquote type="cite" cite="mid:BN9PR03MB6170DE28A2B671AE774D935EF2079@BN9PR03MB6170.namprd03.prod.outlook.com">
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Hello, <br>
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We are about to re-wrap our BCl3 line with heat tape and
insulation and are in need of some advice. In the past we have
used the rather expensive silicone constant wattage heaters with
adjustable power control
<a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.mcmaster.com_heat-2Dtape_constant-2Dwattage-2Dheaters-2Dwith-2Dadjustable-2Dtemperature-2Dcontrol-2Dfor-2Dpipes-2Dand-2Dtubes_&d=DwMFAw&c=WO-RGvefibhHBZq3fL85hQ&r=TEMLD8-VsxCGtcVzmvpT5GFNSczskEKHzW6aYlttmIY&m=KWLJCM6ZhWpx1UvrUBWkHKKjEoGzVZrVKbx1lmT96OCO8boDFL9fPSm9_ykSmZuQ&s=7Db1yjuVUcVyMNWVgF_ViFS0RjFPjkEuD6LZ3iMZYVc&e=" id="LPlnkOWALinkPreview" moz-do-not-send="true">
https://www.mcmaster.com/heat-tape/constant-wattage-heaters-with-adjustable-temperature-control-for-pipes-and-tubes/</a>
. The problem we have is that these do not seem to last very
long before burning out, and as I mentioned are quite expensive.
Does anyone have a better solution? Longer lasting and cheaper?
I should mention that we need only to keep the tubing at maybe
30C to prevent condensation of the BCl3 vapor.
<br>
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McMaster-Carr is the complete source for your plant
with over 595,000 products. 98% of products
ordered ship from stock and deliver same or next
day.</div>
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I was looking at self-regulating heat tapes used to prevent
pipes from freezing (an interesting technology in its own right)
but am not sure they operate above room temperature given their
intended application.
<a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.thecarycompany.com_temperature-2Dcontrol_heating-2Dcables_self-2Dregulating-2Dcables-3Ftemp-5Fvoltage-3D157510&d=DwMFAw&c=WO-RGvefibhHBZq3fL85hQ&r=TEMLD8-VsxCGtcVzmvpT5GFNSczskEKHzW6aYlttmIY&m=KWLJCM6ZhWpx1UvrUBWkHKKjEoGzVZrVKbx1lmT96OCO8boDFL9fPSm9_ykSmZuQ&s=uVM7vhB8VwmRD9MaZyQcnbKLOAHitY3R6t7KI8u58jM&e=" id="LPlnkOWALinkPreview_1" moz-do-not-send="true">
https://www.thecarycompany.com/temperature-control/heating-cables/self-regulating-cables?temp_voltage=157510</a>
The nice thing about these is that they evidently last for
years.
<br>
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<a target="_blank" id="LPUrlAnchor401269" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.thecarycompany.com_temperature-2Dcontrol_heating-2Dcables_self-2Dregulating-2Dcables-3Ftemp-5Fvoltage-3D157510&d=DwMFAw&c=WO-RGvefibhHBZq3fL85hQ&r=TEMLD8-VsxCGtcVzmvpT5GFNSczskEKHzW6aYlttmIY&m=KWLJCM6ZhWpx1UvrUBWkHKKjEoGzVZrVKbx1lmT96OCO8boDFL9fPSm9_ykSmZuQ&s=uVM7vhB8VwmRD9MaZyQcnbKLOAHitY3R6t7KI8u58jM&e=" style="text-decoration: none; color:
var(--themePrimary);" moz-do-not-send="true">Self-Regulating
Heating Cables</a></div>
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margin-right: 8px; overflow: hidden;">
Automatically Adjust Your Heat Output With
Self-Regulating Cables! Keep your pipes from
freezing with our Self-Regulating Heating Cables.
The cables automatically adjust heat output based on
the surface temperature and can also be great for
low-temperature process maintenance. The flexibility
of the cables can help you get even the most hard to
heat applications. Options thermoplastic and
fluropolymer jackets as well as tinned copper braid
outside finishes. Whether you need low, medium, or
high temperature cables, shop and compare all of our
selection to find the best fit for you!</div>
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<a class="moz-txt-link-abbreviated" href="http://www.thecarycompany.com">www.thecarycompany.com</a></div>
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<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255,
255, 255);" class="elementToProof">
Also, do you have any recommendations for insulating tubing in a
cleanroom environment?
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255,
255, 255);" class="elementToProof">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255,
255, 255);" class="elementToProof">
Regards, <br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255,
255, 255);" class="elementToProof">
Michael <br>
</div>
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