<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">This is an update to the P&I documentation.<br><div><br><div>Begin forwarded message:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>From: </b></span><span style="font-family:'Helvetica';">Chris Vidal <<a href="mailto:cvidal@mit.edu">cvidal@mit.edu</a>><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>Subject: </b></span><span style="font-family:'Helvetica';"><b>Answers to P&Id feedback</b><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>Date: </b></span><span style="font-family:'Helvetica';">May 18, 2016 at 8:54:57 AM EDT<br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>To: </b></span><span style="font-family:'Helvetica';">"'Stephen Benson'" <<a href="mailto:felman@jlab.org">felman@jlab.org</a>>, Eric Sun <<a href="mailto:qsun@jlab.org">qsun@jlab.org</a>><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>Cc: </b></span><span style="font-family:'Helvetica';">"Kelsey, James " <<a href="mailto:jkelsey@mit.edu">jkelsey@mit.edu</a>><br></span></div><br><div>
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<div bgcolor="#FFFFFF" text="#000000"><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">I have attempted to answer the questions or
concerns provided to Jim in a feedback email regarding the draft
of the P&ID we recently submitted. Some of these I was not
able to answer and must defer to Jim, who will provide a response
when he has done some flow calculations. <br>
</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">Below are the answers and attached is an
updated P&ID to reflect these concerns.</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><br>
</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><br>
</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(1)<span style="font-size:7.0pt"> </span>The
pressure relief valve and the H2 bottle shall be placed outside
the building. If they are inside the building, JLab fire
protection engineer must approve it</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><span style="color:red">Gas supply now shown
to be outdoors.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(2)<span style="font-size:7.0pt"> </span>What
is the size of ORF-07 (G-21-55)? Is G-21-55 the correct model
number? Do you mean G-21-SS?</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><span style="color:red">Yes. G-21-SS I copied
it from the sample document you provided for your gas delivery
cart, and miss read it.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(3)<span style="font-size:7.0pt"> </span>No
information was provided for PRS-01 and PRS-02. What is their
rated pressure?</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><span style="color:red">The configuration we
would use has been noted on the component selection page and
highlighted on the manufacturers spec page<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(4)<span style="font-size:7.0pt"> </span>After
s. PRS-02, a pressure relief valve shall be installed here. It
must have an ASME stamp. The set pressure of the relief valve must
be clear and obvious on the drawing.</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><span style="color:red">Done<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(5)<span style="font-size:7.0pt"> </span>MFC-01
could fail, so BAR-01 could see the set pressure of the relief
valve. However, BAR-01 is only good for 1000 Tor. This is not
acceptable. A calibrated pressure gauge must be used here.</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><span style="color:red">Manufacturers'
specifications provided show the max pressure at 400kpa or
58psi. The regulator on the H2 bottle should be set much lower
than this.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(6)<span style="font-size:7.0pt"> </span>The
pressure boundary shall be the flange after GV-01 NC. The upstream
piping of the flange is pressure piping; the downstream piping,
vacuum.</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><o:p> </o:p></div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(7)<span style="font-size:7.0pt"> </span>PRLF-01
is not needed because the check valve (CK-02, relief valve) should
be enough. <span style="mso-spacerun:yes"> </span></div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><span style="color:red">See answer to (8)
below.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(8)<span style="font-size:7.0pt"> </span>CK-02
should be directly connected to the vacuum vessel. The document
lists that the cracking pressure of CK-02 is 0.1-25 psig. Is this
your intention? Anything larger than 14.7 psig will make it a
pressure piping system. I think CK-02 shall have a much smaller
cracking pressure. The manufacturer lists the cracking pressure of
249B-16PP is 2-4 psig. Also, the relieving capacity shall be
checked to see if the check value is large enough to handle the H2
flow rate under the cracking pressure in the worst case scenario.
The fully open pressure of the check valve must be on the drawing.
</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><span style="color:red">If we eliminate CK-)@
and keep PRLF-01 does this satisfy you concerns for both (7) and
(8)? PRLF-01 has a diameter of 1.5 inches and a pressure of 1E-7
hPa to 500hPa with a over pressure difference of 200hPa.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(9)<span style="font-size:7.0pt"> </span>The
pressure of the instrument air supply is 80 psig, not 60 psig.
Please make sure 80 psig is okay with you.</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><span style="color:red">Yes this is OK and
will be changed on the drawing.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(10)<span style="font-size:7.0pt"> </span>The
H2 vent must be continuously flushed. The current design doesn’t
do that. If the roots blower vacuum pump does not work, there will
be no flushing N2.</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><span style="color:red">Changed to a direct
N2 connection.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(11)<span style="font-size:7.0pt"> </span>A
control valve, similar to MFC-01, must be used to control the flow
rate of N2. The flow rate requirement is in SOW. A solenoid value
is needed in the N2 circuit to interlock with GV-01 NC, meaning if
GV-01 NC is open, this solenoid valve must be open to flush the
vent with N2. The flushing flow rate must be on the drawing.</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(12)<span style="font-size:7.0pt"> </span>For
each valve and instrumentation device, in addition to model number
and size, please list the design pressure, design temperature,
rated pressure, fluid service (per ASME B31.3), fluid, and ASME
stamped or not.</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><span style="color:red">This information was
already included in the Manufacturer's Spec Sheets provided, and
is also now in the table on page 2 of the drawing.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(13)<span style="font-size:7.0pt"> </span>ORF-08
may not be needed.</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><span style="color:red">ORF-08 removed.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(14)<span style="font-size:7.0pt"> </span>Code
calculation of piping, sizing of the relief valve and the check
valve, and calculation of required flushing N2 flow rate are
required. The calculation may be simple and obvious, but we must
have the appropriate documentations.</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(15)<span style="font-size:7.0pt"> </span>The
label font of the drawing is really small. It is hard to read them
when I print the P&ID on an A2 paper.</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;"><span style="color:red">Original drawing is a
D size as shown in the title block. We were not aware you
required an A2. Font size has been increased as much as I feel
works in the space constraints. Hope this is sufficient.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(16)<span style="font-size:7.0pt"> </span>The
size of GV-01 NC is not readable.</div><div style="margin: 0in 0in 0.0001pt 45pt; text-indent: -27pt;">(17)<span style="font-size:7.0pt"> </span>ORF-01
should be KAPTON, not KAPTOM. </div>
<span style="color:red">Corrected</span>
</div>
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