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<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">It is fairly common industry practice to have two slide gate valves for this service.<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Comic Sans MS"">William (Bill) L. Mostia, Jr PE<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Comic Sans MS"">ISA Life Fellow, TUV FS Engineer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Comic Sans MS"">Principle Engineer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Comic Sans MS"">WLM Engineering Co.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:83.0pt;text-indent:-83.0pt;mso-list:l0 level3 lfo1">
<![if !supportLists]><span style="font-size:12.0pt;font-family:"Comic Sans MS""><span style="mso-list:Ignore">281-728-3722<span style="font:7.0pt "Times New Roman"">
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<p class="MsoNormal"><br>
<span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#333333;background:white">“No trees were killed in the sending of this message. However a large number of electrons were terribly inconvenienced.”<o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo2"><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#333333;background:white">Neil deGrasse Tyson</span><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p></o:p></span></li></ul>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Information provided in this e-mail is provided on an Emptor
<span style="color:#444444;background:white">Caveat basis.</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Comic Sans MS""><o:p> </o:p></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
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<p class="MsoNormal" style="border:none;padding:0in"><b>From: </b><a href="mailto:paul_e.bennett@topmail.co.uk">paul_e.bennett@topmail.co.uk</a><br>
<b>Sent: </b>Monday, February 15, 2021 2:50 PM<br>
<b>To: </b><a href="mailto:systemsafety@lists.techfak.uni-bielefeld.de">systemsafety@lists.techfak.uni-bielefeld.de</a><br>
<b>Subject: </b>[SystemSafety] LOPA</p>
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<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal">While the rest of you are being so quiet, I thought I would drop a<br>
link to the video I saw recently. I know it is about a year old and the<br>
event was more than two years ago, but I figured it would be of<br>
interest here.<br>
<br>
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<br>
It seems that the catalyst only had a single means of stopping its flow,<br>
and its being eroded reduced its effectiveness. One might wonder why<br>
a second slide valve in series, only used for shutdowns, was not thought<br>
to be a useful protection measure that might have prevented the disaster.<br>
<br>
How many think of doing a LOPA for the software they write? The adding<br>
of definitive protective containments.<br>
<br>
Regards<br>
<br>
Paul E. Bennett IEng MIET<br>
Systems Engineer<br>
Lunar Mission One Ambassador<br>
-- <br>
********************************************************************<br>
Paul E. Bennett IEng MIET.....<br>
Forth based HIDECS Consultancy.............<br>
Mob: +44 (0)7811-639972<br>
Going Forth Safely ..... EBA. <a href="https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.electric-boat-association.org.uk%2F&data=04%7C01%7C%7C2548d2b27fca4bf338cc08d8d1f35ce1%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637490190458339389%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=MNSwKN2bAh3nTXuef%2FK4eLc213N8w%2FDwFgxCy0yTLFU%3D&reserved=0">
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