O: 609-859-4323

F: 609-543-2333

Pipeline Integrity and Maintenance Services including Cathodic Protection and Vacuum Excavation

Cathodic Protection Test Station and Coupon Installation

pin brazed pipeline test station
pipe to soil test setup
CP Test Station Reading

CP Test Stations Are To the Pipeline What An Annual Doctor's Physical Is To Your Body

Test stations routinely become damaged or missing over time, whether due to vandalism, landscapers or even construction activities. In addition, the pipeline industry is responding to increased requirements on cathodic protection testing for annual surveys, Integrity Management Programs (IMP) needs, and AC and DC interference monitoring.

Point Integrity offers two methods of test station installations. While we’re confident in both methods of installation, demand has increased for vacuum excavation since it greatly reduces surface disturbance and often requires little to no permitting when performed beside or within a roadway.

• Conventional Method — traditional excavation to top of pipe and cad-welding or pin-brazing a “test” lead to the pipe.

• Vacuum Excavation — vacuum excavation to the top of pipe, sealing the pipe with a unique system, removing the coating, making a welded-wire connection and finally recoating the exposed pipe surface.

Whether it is on a casing, under a manicured lawn, or in a remote area, our firm will help meet your test station and monitoring coupon needs. Our Point Integrity Representative can join in your company’s discussions regarding test stations and will help you develop a plan to meet your needs.

Coupon Installation

If you have abnormal test readings due to unknown reasons, Point Integrity can help solve your problem. Coupons are the primary method of ensuring you are not experiencing active AC corrosion near high voltage power lines.

Coupons are one of the best methods for determining actual polarized potential of a pipeline. The coupons exist for both AC and DC monitoring.

• AC Monitoring — AC coupons have become increasingly necessary as pipelines share, or are located in, close proximity to high voltage AC transmission power lines. The effects of AC interference on a pipeline can cause one of the most aggressive metal loss scenarios known to the industry. In order to test for the true AC current density on a pipeline, the fastest and most reliable measurement is taken from a calibrated AC coupon. The reading taken in the field is directly related to the current density (amps/m^2) on the buried structure. AC interference is affected by not only magnitude of AC voltage but also localized soil resistivity on the pipeline, so one must evaluate more than just voltage to determine if damaging interference is occurring. If you believe interference is an issue, the experts at Point Integrity are available for consultation regarding options in AC Interference Mitigation.

• DC Monitoring — a DC coupon installed at a cathodic protection test point offers two very important benefits. First, there is no need to interrupt all company cathodic protection current, which may affect the subject location, in order to test for a true polarized potential. Secondly, a CP coupon is the only method of acquiring a true polarized (off) potential of the pipeline in areas where other DC current sources exist, such as rail stray currents, mining and welding stray currents, and other cathodically protected facilities.

When you work with Point Integrity, you can be reassured that we have the knowledge and experience to install the right coupons for your company’s needs.

Back to Services...