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00071 CORRELATION OF CASES OF TOP OF LINE CORROSION WITH CALCULATED WATER CONDENSATION RATES

Product Number: 51300-00071-SG
ISBN: 00071 2000 CP
Author: Y.M. Gunaltun, D. Larrey
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In wet gas lines, there is a critical water condensation rate (CWCR) above which top of line corrosion (TLC) takes place. When this limit is exceeded, TLC rate increases with increasing water condensation rate and increasing demand of iron for saturating/super-saturating the condensed water. The influence of the temperature is also very important for the same reason. Organic acids, if present, have a strong influence on the TLC rate. The risk of TLC rate was evaluated for gas lines from four different gas fields and the results were compared to the inspection pigging and UT inspection results and a good agreement was obtained. It seems that the CWCR in wet multiphase gas lines is between... Key words: top of line corrosion, wet gas line, water condensation, inhibition.
In wet gas lines, there is a critical water condensation rate (CWCR) above which top of line corrosion (TLC) takes place. When this limit is exceeded, TLC rate increases with increasing water condensation rate and increasing demand of iron for saturating/super-saturating the condensed water. The influence of the temperature is also very important for the same reason. Organic acids, if present, have a strong influence on the TLC rate. The risk of TLC rate was evaluated for gas lines from four different gas fields and the results were compared to the inspection pigging and UT inspection results and a good agreement was obtained. It seems that the CWCR in wet multiphase gas lines is between... Key words: top of line corrosion, wet gas line, water condensation, inhibition.
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