By estimating pipe-to-soil potential
along the cased pipeline segment and, possibly corrosion rates on the carrier pipe, CAPCOM can help determine whether the cased pipeline section is adequately protected or not, or whether it is time to conduct preventive maintenance.
CIS, also referred to as Close Interval Potential Survey (CIPS) measures the pipe-to-soil potential
at equally spaced intervals directly over the buried pipeline section.
The product is designed to obtain IR-free pipe-to-soil potential
measurements along with AC and DC corrosion current densities by integrating with either traditional buried reference cells, single, or dual coupon cathodic protection (CP) test stations.
CIPS, which records the pipe-to-soil potential
every 1 to 2 meters, indicates how efficiently the CP system is operating.
As shown in Table 1, only (e) in the list is required to measure current; all other criteria require only the measurement of pipe-to-soil potential
(a-d) or the potential difference (f).
When taking a pipe-to-soil potential
, the technician is really making an indirect measurement of changes that have occurred at the pipe soil interface due to the flow of current.
The unit measures rectifier volts and amps, pipe-to-soil potential
, additional shunts and more.
The unit is capable of measuring rectifier volts and amps, pipe-to-soil potential
, test points, critical bonds and more.
Field technical services include specialized surveys such as soil resistivity, pipe-to-soil potential
, close interval coating evaluation (DCVG and ACVG), current requirement and interference tests.
It measures current direction and magnitude (AC and DC current) in the pipeline to supplement and extend the pipe-to-soil potential
data already available, and;
Today, multi-purpose, built-for-purpose, all-in-one, pipeline integrity automation, wireless, data communication radios are available that monitor and report all cathodic protection rectifier operations, automate rectifier interruption, monitor rectifier operational status, monitor and report pipe-to-soil potential
, pipeline pressure and pipeline pigging operations.
The CP survey consisted of performing the annual pipe-to-soil potential
survey oil the original pipeline systems as well as the new pipe installed as part of the expansion project.