Results from Cyclic Internal Pressure Tests on Fiberglass Pipes

摘要

Results are presented from a series of cyclic internal pressure tests performed on fiberglass pipes fabricated according to ASME RTP-1 (1989) and Section X (1989) recommendations. The specimens were 20.32 cm (8 in) internal diameter and 1.525 meters (5 feet) long. The construction layup consisted of an internal corrosion barrier followed by several layers of continuous filament wound glass. A state of pure hoop stress was imposed via an internal pressure system that allowed free axial movement of the pipe. The purpose of the tests was to evaluate current design procedures and to assess the capabilities of acoustic emission (AE) monitoring to detect damage and to predict the leakage pressure for the pipes. Twenty-four specimens were tested to failure with AE monitoring. This paper presents results of these tests, including data on the measured cyclic life of the specimens, comparisons to the static leakage capacity and the effectiveness of AE in determining damage induced by cyclic loading.