Elastic Limit: The maximum
stress to which a material may be subjected without retention of any permanent
deformation after the stress is removed.
Electric Potential: A
voltage existing between the pipe and its environment.
Electric Resistance Weld (ERW):
Weld formed by resistance heating of the two edges of a pipe and then forcing
them together to create a solid-state weld.
Electrical resistance probe (ER):
Corrosion monitoring technique which provides a measurement of the change
in cross sectional area of an electrically conducting material probe through
a test of its resistance.
Electrochemical impedance spectroscopy
(EIS): Corrosion monitoring technique, primarily only used in laboratories,
which is an extension of LPR. It uses a full spectral range of applied potential
sine waves from 100 kHz down to 1 mHz.
Electrochemical noise (EN):
A passive corrosion monitoring technique which monitors the naturally occurring
fluctuations of the current and potential over the surface of a corroding interface.
Equivalent weight (EW):
The quantity [g] of metal consumed by the passage of one Faraday of electric
Erosion: Destruction or
removal of material by abrasive action of moving fluids (or gases) usually accelerated
by the presence of solid particles or matter in suspension.
corrosion: Corrosion due to the accelerated material degradation
under the influence of relative motion between a corroding surface and a corrosive
Estimated Repair Factor (ERF):
The ratio of the pipeline design pressure to the 'safe maximum pressure'
as determined by an analysis criterion (e.g. ASME B 31G, RSTRENG, …).
Evaluation: A review,
following the identification of an anomaly, to determine whether the anomaly
meets specified acceptance criteria.