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<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">I qualified my words because I cannot speak for all the industry. However, my experience with several large refining companies and experience in consulting in the area
of process safety is that most all use two slide-gate valves. Maybe some other people on this list with more experience could speak to their experience in this regard.<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>
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<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>
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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>Wednesday, February 17, 2021 11:09 AM<br>
<b>To: </b><a href="mailto:systemsafety@lists.techfak.uni-bielefeld.de">systemsafety@lists.techfak.uni-bielefeld.de</a><br>
<b>Subject: </b>Re: [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">On 16/02/2021 at 5:56 PM, "W.L. Mostia" <wlmostia@msn.com> wrote:<br>
><br>
>It is fairly common industry practice to have two slide gate <br>
>valves for this service.<br>
<br>
I am glad that it is, at least, fairly common practice, but I would hope<br>
that it might be more widespread practice than that.<br>
<br>
Regards<br>
<br>
Paul E. Bennett IEng MIET<br>
Systems Engineer<br>
Lunar Mission One Ambassador<br>
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