API REPORT PRAC 79-20
The Propagating Buckle in Marine Pipelines
|Publication Date:||1 January 1980|
An investigation has been carried out in order to understand the dynamics of the propagating buckle and to find a basis for designing efficient and effective arresting devices. The velocity of propagation was measured as a function of diameter to thickness ratio and pressure. Tests were carried out in different pressure media. It was found that the propagation velocity is affected by the pressurizing medium used as well as the pressure.
A methodology for experimentally studying the efficiency of arrestors was established. The so called "Slip-On" arrestor was studied using this method. An empirical formula is derived for the efficiency of this arrestor. It was also found that quasi-static design criteria underestimate the arrestor efficiency under dynamic conditions. Any gap between the arrestor and the pipe greatly reduces the efficiency.