Experimental evaluation of the long-term strength of reinforced plastic (GRP) pipes

Laila Koski

Research output: Book/ReportReport

Abstract

The long-term mechanical strength of reinforced plastic (GRP) pipes is studied in internal pressure tests. The GRP pipes are industrially processed of polyester resin which is reinforced with glass fibre. The initial pressure resistance of the pipe structure and the strain in the pipe wall are measured. The longest running times of pressure tests reach nearly 40 000 h. The results of all pressure tests are extrapolated according to the procedure in ASTM standard to give an estimate of the strong of the pipe after an expected period under certain stressed conditions. Certain correlation is found between evaluations based on short and long-time measurements. Three different pipe structures also differ in their behaviour in the test. The pressure test does not necessarily do justice to all pipe structures.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages26
ISBN (Print)951-38-3049-7
Publication statusPublished - 1988
MoE publication typeD4 Published development or research report or study

Publication series

SeriesValtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports
Number518
ISSN0358-5077

Fingerprint

Plastic pipe
Reinforced plastics
Pipe
Polyester resins
Time measurement
Glass fibers
Strength of materials

Keywords

  • plastic pipes
  • reinforced plastics
  • glass fibers
  • pressure tests
  • mechanical strength

Cite this

Koski, L. (1988). Experimental evaluation of the long-term strength of reinforced plastic (GRP) pipes. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 518
Koski, Laila. / Experimental evaluation of the long-term strength of reinforced plastic (GRP) pipes. Espoo : VTT Technical Research Centre of Finland, 1988. 26 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 518).
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Koski, L 1988, Experimental evaluation of the long-term strength of reinforced plastic (GRP) pipes. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, no. 518, VTT Technical Research Centre of Finland, Espoo.

Experimental evaluation of the long-term strength of reinforced plastic (GRP) pipes. / Koski, Laila.

Espoo : VTT Technical Research Centre of Finland, 1988. 26 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 518).

Research output: Book/ReportReport

TY - BOOK

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AU - Koski, Laila

PY - 1988

Y1 - 1988

N2 - The long-term mechanical strength of reinforced plastic (GRP) pipes is studied in internal pressure tests. The GRP pipes are industrially processed of polyester resin which is reinforced with glass fibre. The initial pressure resistance of the pipe structure and the strain in the pipe wall are measured. The longest running times of pressure tests reach nearly 40 000 h. The results of all pressure tests are extrapolated according to the procedure in ASTM standard to give an estimate of the strong of the pipe after an expected period under certain stressed conditions. Certain correlation is found between evaluations based on short and long-time measurements. Three different pipe structures also differ in their behaviour in the test. The pressure test does not necessarily do justice to all pipe structures.

AB - The long-term mechanical strength of reinforced plastic (GRP) pipes is studied in internal pressure tests. The GRP pipes are industrially processed of polyester resin which is reinforced with glass fibre. The initial pressure resistance of the pipe structure and the strain in the pipe wall are measured. The longest running times of pressure tests reach nearly 40 000 h. The results of all pressure tests are extrapolated according to the procedure in ASTM standard to give an estimate of the strong of the pipe after an expected period under certain stressed conditions. Certain correlation is found between evaluations based on short and long-time measurements. Three different pipe structures also differ in their behaviour in the test. The pressure test does not necessarily do justice to all pipe structures.

KW - plastic pipes

KW - reinforced plastics

KW - glass fibers

KW - pressure tests

KW - mechanical strength

M3 - Report

SN - 951-38-3049-7

T3 - Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports

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Koski L. Experimental evaluation of the long-term strength of reinforced plastic (GRP) pipes. Espoo: VTT Technical Research Centre of Finland, 1988. 26 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 518).