API REPORT 79-20 The Propagating Buckle in Marine Pipelines
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API REPORT 79-20 Document Information:
Title
The Propagating Buckle in Marine Pipelines
American Petroleum Institute
Publication Date:
Jan 1, 1980
Scope:
SUMMARY
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.
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