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The effect of environmental conditions on the hydrostatic burst pressure and impact performance of glass fiber reinforced thermoset pipes

Naik, Mohammed Khaliq (2005) The effect of environmental conditions on the hydrostatic burst pressure and impact performance of glass fiber reinforced thermoset pipes. Masters thesis, King Fahd University of Petroleum and Minerals.

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English Abstract

During the long-term exposure of through Glass fiber reinforced plastic (GFRP) pipes, material degradation is expected to occur in the matrix, fiber, and the fiber-matrix interfacial regions. The degradation rate may be constant or increase/decrease with time and can be gradual and abrupt. Changes in the degradation mechanisms may also occur during the course of long-term exposure. All of these issues raise serious concerns regarding the long-term durability of the GFRP pipes and constitute problems that require solutions before extensive use of the GFRP pipes in applications such as oil/gas gathering and transportation networks. In this study the effect of a variant natural and accelerated exposure conditions hydrostatic burst and low velocity impact tests on the 150 mm diameter GFRP pipes have been investigated. An in-house hydrostatic burst testing system and an instrumented impact tester were used for the testing. Pipe specimens of 150 mm internal diameter, 6 mm thickness and 1000 mm long were used for burst tests where as, for impact tests pipe sections of 160 mm length were used. Pipes were exposed to selected environments ranging from outdoor exposures (upto 12 months) to accelerated exposures of dry heat, humidity, seawater, and salt fog for periods ranging from 100 to 1000 hours. Pressure performance of the GFRP pipes reduces to almost 80% for high energies impact. The energy absorbing capability of GFRV pipes exposed to dry heat first increases and decreases thereafter, due to curing effect. For salt spray exposure conditions decrease in impact resistance was observed. A similar trend of decrease in impact resistance was observed for humidity ambient. For humidity 100% exposure, an increase in impact resistance was noticed.



Item Type:Thesis (Masters)
Date:December 2005
Date Type:Completion
Subjects:Mechanical
Divisions:College Of Engineering Sciences > Mechanical Engineering Dept
Creators:Naik, Mohammed Khaliq
Committee Advisor:Al-Sulaiman, Faleh A.
Committee Members:Khan, Zafarullah and Merah, NeCar
ID Code:10510
Deposited By:KFUPM ePrints Admin
Deposited On:22 Jun 2008 17:06
Last Modified:30 Apr 2011 15:36

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