Emergency Vent Calculations

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=2 height=90 BGCOLOR="#336699" TEXT="#080000" bgproperties="fixed" background="045005a0erlcin.png"> <div> <FONT SIZE="2" COLOR="#FF6600" FACE="Arial" ><A HREF="index.htm" TARGET="_top" TITLE="PRD Technologies Inc."><U><B>HOME </B></U></A><B> </B></FONT><B>   </B><A HREF="id55.htm" TARGET="_top" TITLE="Tank Protection Equipment FAQ"><U><B> </B></U></A><FONT SIZE="2" COLOR="#FF6600" FACE="Arial" ><A HREF="id55.htm" TARGET="_top" TITLE="Tank Protection Equipment FAQ"><U><B> BACK </B></U></A></FONT><A HREF="id55.htm" TARGET="_top" TITLE="Tank Protection Equipment FAQ"><U><B> </B></U></A><B>|  </B><FONT SIZE="7" COLOR="#FF6600" FACE="Arial" ><B> </B></FONT><FONT SIZE="7" COLOR="#FFFFCC" FACE="Arial" ><B>  </B></FONT><FONT SIZE="6" COLOR="#FFFFFF" FACE="Arial" ><B>PRD Technologies Inc.</B></FONT></div> <bR> <div> </div> </td> </tr><tr> <td valign="top" width=210 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> Emergency Vent Calculations</div> <div> <B><IMG SRC="2499b910.jpg" border=0 width="155" height="145" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> <B>API 2000 Std for Sizing Pressure Vacuum Valves</B></div> <div> <B>API 2000 Std for Sizing Emergency Vents</B></div> <div> <A HREF="id150.htm" TARGET="_top" TITLE="Table 2 Emergency Venting Capacity"><U><B>API 2000 Std </B></U></A><A HREF="id150.htm" TARGET="_top" TITLE="Table 2 Emergency Venting Capacity"><U><B>Table 2 Total Rate of Emergency Venting</B></U></A><A HREF="id150.htm" TARGET="_top" TITLE="Table 2 Emergency Venting Capacity"><U><B> </B></U></A><A HREF="id150.htm" TARGET="_top" TITLE="Table 2 Emergency Venting Capacity"><U><B> </B></U></A></div> </td> <td valign="top" height=390 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> <IMG SRC="41a9b3e0.png" border=0 width="155" height="62" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> <B>EMERGENCY VENTING CALCULATIONS</B></div> <bR> <div> For Emergency Venting Requirement refer to <A HREF="id150.htm" TARGET="_top" TITLE="Table 2 Emergency Venting Capacity"><U>Table 2 Total Rate of Emergency Venting</U></A> </div> <bR> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="439" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="VOID" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=BOTTOM COLSPAN=6 HEIGHT= 19 ><NOBR><div> <B>Sample Emergency Valve Calculation / Selection</B></div> </NOBR></tD> <tD VALIGN=BOTTOM WIDTH="96"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="96" HSPACE="0" VSPACE="0"></tD> </tR> <tR> <tD VALIGN=BOTTOM COLSPAN=5 HEIGHT= 20 ><NOBR><div> <B>Emergency Relief Requirements</B></div> </NOBR></tD> <tD VALIGN=BOTTOM WIDTH="25"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="20" ALIGN="bottom" WIDTH="25" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="96"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="20" ALIGN="bottom" WIDTH="96" HSPACE="0" VSPACE="0"></tD> </tR> <tR> <tD VALIGN=BOTTOM HEIGHT= 19 WIDTH="56"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="56" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="15"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="15" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="116"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="116" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="15"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="15" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="82"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="82" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="25"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="25" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="96"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="96" HSPACE="0" VSPACE="0"></tD> </tR> <tR> <tD VALIGN=BOTTOM COLSPAN=5 HEIGHT= 19 WIDTH="296"><div> <B>Wetted Area = Pie x DIA x Height</B></div> </tD> <tD VALIGN=BOTTOM WIDTH="25"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="25" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="96"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="96" HSPACE="0" VSPACE="0"></tD> </tR> <tR> <tD VALIGN=BOTTOM HEIGHT= 19 WIDTH="56"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="56" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="15"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="15" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="116"><div> Diameter</div> </tD> <tD VALIGN=BOTTOM WIDTH="15"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="15" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="82"><div> Height </div> </tD> <tD VALIGN=BOTTOM WIDTH="25"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="25" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM><NOBR><div> Wetted Area</div> </NOBR></tD> </tR> <tR> <tD VALIGN=CENTER HEIGHT= 16 WIDTH="56"><div> 3.14</div> </tD> <tD VALIGN=CENTER WIDTH="15"><div> x</div> </tD> <tD VALIGN=CENTER WIDTH="116"><div> 10</div> </tD> <tD VALIGN=CENTER WIDTH="15"><div> x</div> </tD> <tD VALIGN=CENTER WIDTH="82"><div> 15</div> </tD> <tD VALIGN=CENTER WIDTH="25"><div>  =</div> </tD> <tD VALIGN=CENTER WIDTH="96"><div> 471</div> </tD> </tR> <tR> <tD VALIGN=BOTTOM HEIGHT= 19 WIDTH="56"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="56" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="15"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="15" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="116"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="116" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="15"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="15" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM COLSPAN=3><NOBR><div> max HT = 30' see table #2 Pg TS-37</div> </NOBR></tD> </tR> <tR> <tD VALIGN=BOTTOM HEIGHT= 19 WIDTH="56"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="56" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="15"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="15" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="116"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="116" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="15"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="15" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="82"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="82" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="25"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="25" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=BOTTOM WIDTH="96"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="96" HSPACE="0" VSPACE="0"></tD> </tR> <tR> <tD VALIGN=CENTER HEIGHT= 20 WIDTH="56"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="20" ALIGN="bottom" WIDTH="56" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=CENTER WIDTH="15"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="20" ALIGN="bottom" WIDTH="15" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=CENTER WIDTH="116"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="20" ALIGN="bottom" WIDTH="116" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=CENTER WIDTH="15"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="20" ALIGN="bottom" WIDTH="15" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=CENTER WIDTH="82"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="20" ALIGN="bottom" WIDTH="82" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=CENTER WIDTH="25"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="20" ALIGN="bottom" WIDTH="25" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=CENTER BGCOLOR=#FFFF00 WIDTH="96"><div> <B>341,820</B></div> </tD> </tR> </TABLE></div> <div> From Table 2</div> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="428" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ROWS" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=BOTTOM HEIGHT= 19 WIDTH="191"><div> 400 </div> </tD> <tD VALIGN=BOTTOM WIDTH="224"><div> 312000</div> </tD> </tR> <tR> <tD VALIGN=BOTTOM BGCOLOR=#FFFF00 HEIGHT= 20 WIDTH="191"><div> <B> therefore 471  = </B></div> </tD> <tD VALIGN=BOTTOM BGCOLOR=#FFFF00 WIDTH="224"><div> <B> 341,820</B></div> </tD> </tR> <tR> <tD VALIGN=BOTTOM HEIGHT= 19 WIDTH="191"><div> 500</div> </tD> <tD VALIGN=BOTTOM WIDTH="224"><div> 354000</div> </tD> </tR> </TABLE></div> <bR> <div> <B>For further assistance or information call (330) 253-4800or email: </B><A HREF="mailto:sales@prdtechnologies.com" TARGET="_top" TITLE="mailto:sales@prdtechnologies.com"><U><B>sales@prdtechnologies.com</B></U></A><A HREF="mailto:sales@prdtechnologies.com" TARGET="_top" TITLE="mailto:sales@prdtechnologies.com"><U> </U></A> </div> <bR> <bR> </td> </tr></table></body>