Improved method for measuring pipe-to-soil potential and current density at cathodically protected pipelines

Journal Article · Thu Mar 01 04:00:00 EST 1979 · Mater. Prot.; (United States)

OSTI ID:5548264

Kasahara, K; Sato, T; Adachi, H

Tokyo Gas Co., Ltd., has developed an alternative method for measuring the true pipe-to-soil potentials and current density on cathodically protected pipelines that is effective even when stray currents interfere with the protection system. A key element in the technique is an analog probe simulating a coating holiday. The method assumes that the potential at the simulated holiday on the probe is identical to that of a holiday on the pipeline; when current from the pipeline to the probe is interrupted, a voltmeter records the potential of the probe. The probe and a reference anode are exposed at or near pipeline depth for the measurement. The procedure eliminates the potential-drop allowance required for other methods of pipe-to-soil measurement and permits a precise assessment of the effects of holidays on pipe-to-soil potential, current density, soil environment, and pipe coating.

• OSTI ID: 5548264
• Journal Information: Mater. Prot.; (United States), Journal Name: Mater. Prot.; (United States) Vol. 18; ISSN MAPRA
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
032000* -- Natural Gas-- Transport
Handling
& Storage
CATHODIC PROTECTION
CORROSION PROTECTION
CURRENT DENSITY
ELECTRIC POTENTIAL
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
NATURAL GAS
PIPELINES