Impact Behaviour Of Pressurised Pipelines
Author(s)
N. Jones & R. S. Birch
Abstract
Experimental tests are reported on steel pipelines that have been struck by a
relatively large rigid wedge-shaped mass travelling up to 10.4 m/s. A pipeline is
supported across a span, is fully clamped at both ends and is struck at the
mid-span and at the one quarter span positions. Most of the pipelines are
pressurised with a nitrogen gas. The initial impact energy produces large
inelastic ductile deformations of the pipeline and, in some cases, failure. The
experimental results are compared with previous data obtained on larger
diameter pipelines and observations are offered on the accuracy of the
geometrically similar scaling of the final deformations. The results are also
compared with several empirical equations and comments are made on their
accuracy.
Keywords: pipelines, impact loading, internal pressure, ductile deformations,
failure, empirical equations, geometrically similar scaling.
1 Introduction
Pipelines are used throughout industry to convey gases and liquids under high
pressures over long distances and between pressure vessels and other industrial
plant. These pipelines are often situated in potentially dangerous environments
so that safety calculations are required by various bodies to assess the hazards
associated with the accidental release of any contents. Impact loads are
particularly hazardous and estimates are required for the resistance of a
pressurised pipeline to any object that, for example, may be dropped from a
crane during maintenance operations, or propelled by the gases after an
explosion that causes fragmentation of a pressure vessel. This article focuses on
those extreme events when heavy objects travelling at relatively low velocities
Keywords
pipelines, impact loading, internal pressure, ductile deformations,
failure, empirical equations, geometrically similar scaling.
Related Book
Other papers in this volume
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