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MP BLOG Continued from page 11
with feedwater into the 600-psi (4,137- kPa) boilers. The caustic upset the boilers IVL ÆI[PML W^MZ _Q\P \PM [\MIU \W [XZMIL \PZW]OPW]\ \PM [\MIU [a[\MU QVKT]LQVO [\MIU \]ZJQVM[ IVL \PM S8I IVL
X[Q X[Q [a[\MU[ 1 _I[ XZM[MV\ I\
one teardown of a turbine that contained I [QOVQÅKIV\ Y]IV\Q\a WN _PQ\M LMXW[Q\[ QV its internals.
5a _WZS _I[ NWK][ML WV U]T\QXTM
M`IUXTM[ WN KI][\QK KZIKSQVO QV \PM [\MIU XQXQVO _MTL[ \PI\ WKK]ZZML ]X \W [M^MZIT weeks after the caustic incident, and the M`IUQVI\QWV WN \PM [\MIU \]ZJQVM _I[ I [MKWVLIZa Q[[]M )T\PW]OP \PW[M QV^M[\QOI\QVO \PM ZWW\
cause of the incident concluded that the KI][\QK KWV\IUQVI\QWV _I[ I WVM \QUM
M^MV\ KI][ML Ja IV WXMZI\QWV[ MZZWZ \PM KWV[MY]MVKM[ WN \PM KI][\QK KWV\IUQVI- tion were present throughout the plant's [\MIU [a[\MU NWZ [M^MZIT UWV\P[ 1 [][XMK\ that the excess caustic was present as solid LMXW[Q\[ QV \PM XQXQVO _PMV \PM [\MIU _I[ ZMTI\Q^MTa LZa J]\ KW]TL LQ[[WT^M IVL JMKWUM UWZM UWJQTM L]ZQVO XMZQWL[ \PI\ \PM [\MIU _I[ ZMTI\Q^MTa _M\
Perhaps the white-colored deposits
aW] LM[KZQJM KW]TL JM ZMTI\ML \W M`KM[[ KI][\QK QV \PM [\MIU [a[\MU )VITa[Q[ WN [IUXTM[ NZWU [\MIU \ZIX[ UQOP\ ZM^MIT unusual conditions that could account NWZ \PM LMXW[Q\[ aW] WJ[MZ^ML
Q[ [WLQ]U PaLZW`QLM 6I70 \PMZM _W]TL VW\ JM XQ\\QVO WZ IVa SQVL WN KWZ- ZW[QWV M`KMX\ NWZ \PM XW[[QJQTQ\a WN [\ZM[[ KWZZW[QWV KZIKSQVO XIZ\QK]TIZTa WN \PM LQ[K[ I\ \PM JTILM I\\IKPUMV\ The reason for the deposit distribu-
A A 12 MATERIALS PERFORMANCE April 2012
tion, up to the extraction, could be be- KI][M \PI\ Q[ \PM ZMOQWV _PMZM \PM [\MIU is superheated. After the extraction, it UIa JM [I\]ZI\ML IVL _M\ IVL \PM JTILM []ZNIKM[ IZM _I[PML ZMTI\Q^MTa KTMIV ?M [\ZWVOTa ZMKWUUMVL IVITabQVO \PM LMXW[- Q\[ M^MZa \QUM \PM \]ZJQVM Q[ WXMV
Removal of barium sulfate from a pipeline
Q
How can I remove barium sulfate (BaSO4
) from a pipeline?
NACE International, Vol. 51, No. 4