Root Cause Analysis - Corrosion

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=2 height=100 BGCOLOR="#CCCCFF" TEXT="#080000" bgproperties="fixed" background="0d200640egdysm.jpg"> <div> <FONT SIZE="6" COLOR="#000066" FACE="Arial" ><B>Jonas, Inc.</B></FONT><FONT SIZE="5" COLOR="#000099" FACE="Arial" ><B> </B></FONT><FONT SIZE="1" COLOR="#000099" FACE="Arial" ><B>  </B></FONT><B> </B><B> |     </B><A HREF="index.htm" TARGET="_top" TITLE="Jonas, Inc."><U><B>Home</B></U></A><B> </B><B> </B><B>   </B><B> |    </B><A HREF="contact.htm" TARGET="_top" TITLE="Contact Us"><U><B>Contact Us</B></U></A><B>                                           </B></div> <div> back to<B>  </B><A HREF="troubleshooting_resources.htm" TARGET="_top" TITLE="Troubleshooting Resources / Technical Ar"><U><B>Troubleshooting Resources / Technical Articles</B></U></A><B>    </B><B>|</B><B> </B><FONT SIZE="2" COLOR="#FFFF00" FACE="Arial" ><B>    </B></FONT><A HREF="analysis.htm" TARGET="_top" TITLE="Failure and Root Cause Analysis"><U><B>Failure and Root Cause Analysis</B></U></A><B>                         </B><FONT SIZE="3" COLOR="#000099" FACE="Arial" ><B>                                                           </B></FONT></div> <div> </div> </td> </tr><tr> <td valign="top" width=155 BGCOLOR="#0000BF" TEXT="#F7F7FF"> <div> <A HREF="corrosion_and_water_chemistry_problems.htm" TARGET="_top" TITLE="Corrosion and Water Chemistry Problems i"><U>Corrosion and Water Chemistry Problems in Steam Systems</U></A></div> <div> <A HREF="steam_turbine_corrosion.htm" TARGET="_top" TITLE="Steam Turbine Corrosion"><U>Steam Turbine Corrosion</U></A></div> <div> <A HREF="copper_deposition_and_mw_loss.htm" TARGET="_top" TITLE="Copper Deposition and MW Loss: Problem "><U>Copper Deposition and MW Loss:  Problem and Its Solutions</U></A></div> <div> <A HREF="corrosion_field_monitoring.htm" TARGET="_top" TITLE="Steam Turbine Problems and Their Field M"><U>Steam Turbine Problems and Their Field Monitoring</U></A></div> <div> <A HREF="designing_steam_cycles.htm" TARGET="_top" TITLE="Designing Steam Cycles to Avoid Corrosio"><U>Designing Steam Cycles to Avoid Corrosion</U></A></div> <div> <A HREF="effective_cycle_chemistry.htm" TARGET="_top" TITLE="Effective Cycle Chemistry Control"><U>Effective Cycle Chemistry Control</U></A></div> <div> <A HREF="cycle_chemistry_commissioning.htm" TARGET="_top" TITLE="Cycle Chemistry Commissioning"><U>Cycle Chemistry Commissioning</U></A></div> <div> <A HREF="chemistry_commissioning.htm" TARGET="_top" TITLE="Tight Control of Cycle Chemistry Key To "><U>Tight Control of Cycle Chemistry Key To Successful Commissioning</U></A></div> <div> <A HREF="understanding_steam_cycle_chemistry_pdf.htm" TARGET="_top" TITLE="Understanding Steam Cycle Chemistry"><U>Understanding Steam Cycle Chemistry</U></A></div> <div> <A HREF="missing_knowledge.htm" TARGET="_top" TITLE="Water Chemistry and Corrosion Missing K"><U>Water Chemistry and Corrosion - Missing Knowledge</U></A></div> <div> <A HREF="hideout.htm" TARGET="_top" TITLE="Phosphate Hideout"><U>Phosphate Hideout</U></A></div> <div> <A HREF="monitoring_of_steam_plants.htm" TARGET="_top" TITLE="Monitoring of Steam Plants"><U>Monitoring of Steam Plants</U></A></div> <div> <A HREF="sampling_savvy.htm" TARGET="_top" TITLE="Sampling Savvy"><U>Sampling Savvy</U></A></div> <div> <A HREF="steam_sampling_system.htm" TARGET="_top" TITLE="Development of a Steam Sampling System"><U>Development of a Steam Sampling System</U></A></div> <div> <A HREF="qaqc_sampling.htm" TARGET="_top" TITLE="QA/QC for Sampling and Analysis"><U>QA/QC for Sampling and Analysis</U></A></div> <div> <A HREF="current_water_treatment_practices.htm" TARGET="_top" TITLE="Current Water Treatment Practices: Util"><U>Current Water Treatment Practices:  Utility and Industrial Steam Systems</U></A></div> <div> <A HREF="epri_chemexpert.htm" TARGET="_top" TITLE="EPRI ChemExpert: Cycle Chemistry Adviso"><U>EPRI ChemExpert:  Cycle Chemistry Advisor for Fossil Power Plants</U></A></div> <div> <A HREF="nitrogen_sparging_and_blanketing.htm" TARGET="_top" TITLE="Nitrogen Sparging and Blanketing"><U>Nitrogen Sparging and Blanketing</U></A></div> <div> <A HREF="safety_issues_pdf.htm" TARGET="_top" TITLE="Safety Issues in Fossil Utility and Indu"><U>Safety Issues in Fossil Utility and Industrial Steam Systems</U></A></div> <div> <A HREF="id199.htm" TARGET="_top" TITLE="Importance of Leak Predictions"><U>Importance of Leak Predictions</U></A></div> <div> <A HREF="plant_alert.htm" TARGET="_top" TITLE="Plant Alert: Dont Let ErosionCorrosion "><U>Plant Alert:  Don't Let Erosion-Corrosion Compromise Safety</U></A></div> <div> <A HREF="control_of_erosion_corrosion.htm" TARGET="_top" TITLE="Control of ErosionCorrosion of Steels in"><U>Control of Erosion-Corrosion of Steels in Wet Steam</U></A></div> <div> <A HREF="condensation_in_steam_turbines.htm" TARGET="_top" TITLE="Condensation in Steam Turbines: New The"><U>Condensation in Steam Turbines:  New Theory and Data</U></A></div> <div> <A HREF="preloading_of_packing_valves.htm" TARGET="_top" TITLE="New Procedure and Equipment for Precise "><U>New Procedure and Equipment for Precise Preloading of Valve Packings</U></A></div> <div> <A HREF="particulate_probe.htm" TARGET="_top" TITLE="Continuous Monitoring of Water Droplets "><U>Continuous Monitoring of Water Droplets in Natural Gas</U></A></div> <div> <A HREF="geothermal.htm" TARGET="_top" TITLE="Measuring Steam Impurities in a Geotherm"><U>Measuring Steam Impurities in a Geothermal Pipe Line System</U></A></div> <div> <A HREF="steam_air_blow.htm" TARGET="_top" TITLE="Instrument Monitors Steam and Air Blowin"><U>Instrument Monitors Steam and Air Blowing</U></A></div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700c8ffcccc00.gif" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Root Cause Analysis - Corrosion</B></div> <bR> </td> <td valign="top" height=380 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> <B>Root Cause Analysis - Corrosion</B></div> <div> <B>~ 50% of True Root Causes are Never Found</B></div> <div> <IMG BORDER="0" SRC="Symb075c00b700c800000000.gif" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Secure recent and historical data</div> <div> <IMG BORDER="0" SRC="Symb075c00b700c800000000.gif" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Involve the vendor and the best consultants you can get</div> <div> <IMG BORDER="0" SRC="Symb075c00b700c800000000.gif" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Inspect similar locations (same unit, other units)</div> <div> <IMG BORDER="0" SRC="Symb075c00b700c800000000.gif" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Metallography and fractography, surface chemistry</div> <div> <IMG BORDER="0" SRC="Symb075c00b700c800000000.gif" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Manufacturing defects, material properties (original and now)</div> <div> <IMG BORDER="0" SRC="Symb075c00b700c800000000.gif" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">NDT and maintenance history (same unit, other units, industry-wide)</div> <div> <IMG BORDER="0" SRC="Symb075c00b700c800000000.gif" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Operation:  controls, water chemistry, heat related, interview operators, control room data; pressure, temperature, % moisture</div> <div> <IMG BORDER="0" SRC="Symb075c00b700c800000000.gif" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Design:  cycle, component, failure location; compare to codes other designs; stresses, fracture mechanics, fatigue</div> <div> <IMG BORDER="0" SRC="Symb075c00b700c800000000.gif" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Monitor conditions:  pressure, temperature, stress, transients, water/steam chemistry</div> <div> <IMG BORDER="0" SRC="Symb075c00b700c800000000.gif" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Measure or calculate at-surface and at-temperature chemistry; heat transfer, steam expansion, etc.</div> <div> <IMG BORDER="0" SRC="Symb075c00b700c800000000.gif" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Do the damaging conditions exist now?  </div> <bR> <DIV ALIGN="LEFT"></DIV> <div> <IMG SRC="1a866430.gif" border=0 width="358" height="67" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </td> </tr></table></body>