Rise In Brittle Fracture Resistance Of Spherical
Vessels For Storage Of Liquid Ammonia Under
Extreme Forces
Author(s)
E. M. Basko, V. V. Larionov & V. N. Lazutin
Abstract
This report presents the results of spherical vessel investigation and laboratory
research of physico-mechanical properties of steel and welded joints. Dynamics
of corrosion-mechanical cracking of the vessel welded joints and brittle fracture
resistance at low temperatures and dynamic forces have been given in the context
of fracture mechanics. The major causes of corrosion-mechanical cracking of the
vessel welded joints in the medium of liquid ammonia have been determined.
The performance of works on stress deconcentration in the butt-welded joints on
the inside of the wall being in contact with ammonia was demonstrated to be an
effective method of increasing resistance to corrosion-mechanical cracking and
brittle fracture.
Keywords: spherical vessel, ammonia, pressure, cracks, defects, welded joints,
life, cracking resistance, brittle fracture, dynamic stress.
1 Introduction
Practice of application of the welded pressure vessels for storage of liquid
ammonia demonstrated that corrosion-mechanical cracking (CMC) of welded
joints is made possible in the course of their service. The action of extreme
forces in cracking can result in brittle fracture of vessels at stresses that are
substantially below the design values. This is associated both with the resulting
dynamic effects and with dependence of cracking resistance characteristics and
critical temperatures of vessel material brittleness on strain rate. In this
connection when evaluating resistance to fracture of vessels for storage of
ammonia on action of extreme forces it is necessary to take into account
Keywords
spherical vessel, ammonia, pressure, cracks, defects, welded joints,
life, cracking resistance, brittle fracture, dynamic stress.
Related Book
Other papers in this volume
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