Experimental Study on Radial Interacting Corrosions in Pipelines

The integrity of pipeline is compromised when corrosion develops. The corrosion
referred to is radial interacting corrosion which is happening internally and externally
at the same time. This research investigates the effect of corrosion in the radial
direction towards the failure burst pressure of the pipeline. Four types of corrosion
defect orientations were developed from literatures and tested experimentally to
compare the failure burst pressure of the pipes with radial interacting corrosion and
external corrosion. The external corrosion failure burst pressure was calculated
theoretically by using Modified ASME B31G standard. Four pipe specimen of grade
API 5L X42 pipeline was used to conduct the experiment. The results of the failure
burst pressure have shown that pipes having radial interacting corrosion fails at a
lower burst pressure compared to the pipes having only external corrosion defect.