Real-time electronic monitoring of a pitted and leaking gas gathering pipeline
Hydrogen patch, flush electrical resistance, and flush linear polarization proves wre used with flush coupons to monitor corrosion rates in a pitted and leaking sour gas gathering line. Four inhibitors were evaluated in stopping the leaks. Inhibitor residuals and the amount and ratio of water and condensate in the lines were measured at five locations along the line. The best inhibitor reduced reduced the pit-leak frequency by over a factor of 10. Inhibitor usage rate was optimized using the hydrogen patch current as a measure of the instantaneous corrosion rate. Improper pigging was identified as a cause of corrosion transients. This problem is discussed in relation to the pigging of pipelines in stratified flow where moving fluids are the carriers for continuously injected corrosion inhibitors.
- Research Organization:
- Petrolite Corp., St. Louis, MO 63119
- OSTI ID:
- 7198661
- Journal Information:
- Mater. Performance; (United States), Vol. 25:8
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
NATURAL GAS
TRANSPORT
PIPELINES
LEAKS
ON-LINE CONTROL SYSTEMS
PITTING CORROSION
CLEANING
CONDENSATES
CONSUMPTION RATES
CORROSION INHIBITORS
ELECTRIC CONDUCTIVITY
ELECTRIC PROBES
FLUID FLOW
HYDROGEN
LEAK DETECTORS
MONITORING
POLARIZATION
REAL TIME SYSTEMS
WATER
CHEMICAL REACTIONS
CONTROL SYSTEMS
CORROSION
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROGEN COMPOUNDS
NONMETALS
ON-LINE SYSTEMS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PROBES
032000* - Natural Gas- Transport
Handling
& Storage
360105 - Metals & Alloys- Corrosion & Erosion