EFFECTS OF SMOOTH AND ROCK DENTS ON LIQUID PETROLEUM PIPELINES

This paper summarizes the findings of a project sponsored by the American Petroleum Institute (API) to determine the effects of smooth dents and rock dents on the integrity of liquid petroleum pipelines. The incentive for conducting this work is to avoid replacing or repairing pipe affected by such dents if they do not constitute a threat to pipeline serviceabilty Smooth and rock dents were studied using 12, 24 and 24 inch diameter pipes. The smooth dents were made using either domeshaped or bar-like indenters.