In-Situ Stress Measurement in Pipelines

In-Situ Stress Determination on Pipeline The ASTM E837 in-situ stress test method is often used to check the stress state in pipelines in locations where landslips or subsidence have occurred. At each cross section, a set of three tests is carried out, equally spaced around the circumference. Usually vibrating wire strain gauges are fitted to the pipe at the same time to monitor the change in stress state over time.

The in-situ stress measurement test results are used to calculate the stress state in the pipeline, and remedial work often follows to straighten the pipes. The vibrating wire strain gauges are used to monitor the changes in stress when remedial works are undertaken, and to provide ongoing data about the stress state from that point forward.

Benefits of In-situ Stress Measurement of Pipelines

Warns if pipeline failure is likely
Guards against possibility of spills/leaks
Provides information on current stress state due to fabrication, installation and
any ground movements
Provides a datum for long-term monitoring