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PRCI PR-201-9202
- High Pressure Pipe Design
- Report / Survey by Pipeline Research Council International, 01/01/1993
- Publisher: PRCI
$398.00$795.00
L51703e
Stress Engineering Services, Inc.
Need: Current practices in the pipeline industry require increased use of high pressure pipe and pipe fittings to meet expanding natural gas transportation requirements. A study of the current practices in the design and manufacture of pipe and pipe fittings (size on size tees, elbows, concentric reducers) in the range of 16 to 36 inch and with design pressures up to 3000 psi was needed.
Result: It was determined that yield strength is not significant to burst pressure or to fatigue, but tensile strength is significant to both. Ultimate tensile strength can be estimated on fittings of unknown origin by non-destructive hardness tests. Recommendations to users based on this study are included in this report. This study includes dimensional data from manufacturers and from fittings and pipe obtained from the Williams "Transco" unit stock. In addition this study includes comprehensive research of existing standards, linear and non-linear finite element analysis results and full-size instrumented fitting burst test data are included.
Benefit: It was determined that manufacturers can make fittings suitable for 3000 psi service and that the resulting pipe and fitting put in service provide significant cost benefit for the user. It is recommended that this be done by making thicker fittings with conventional carbon manganese steel rather than using high-strength micro alloy steels which may require preheat or postheat of the welds to the pipe. Finite element analysis results provided in this study are very useful for the user in assessing the capacity of fittings and is recommended in specification of required design verifications and burst tests.
Stress Engineering Services, Inc.
Need: Current practices in the pipeline industry require increased use of high pressure pipe and pipe fittings to meet expanding natural gas transportation requirements. A study of the current practices in the design and manufacture of pipe and pipe fittings (size on size tees, elbows, concentric reducers) in the range of 16 to 36 inch and with design pressures up to 3000 psi was needed.
Result: It was determined that yield strength is not significant to burst pressure or to fatigue, but tensile strength is significant to both. Ultimate tensile strength can be estimated on fittings of unknown origin by non-destructive hardness tests. Recommendations to users based on this study are included in this report. This study includes dimensional data from manufacturers and from fittings and pipe obtained from the Williams "Transco" unit stock. In addition this study includes comprehensive research of existing standards, linear and non-linear finite element analysis results and full-size instrumented fitting burst test data are included.
Benefit: It was determined that manufacturers can make fittings suitable for 3000 psi service and that the resulting pipe and fitting put in service provide significant cost benefit for the user. It is recommended that this be done by making thicker fittings with conventional carbon manganese steel rather than using high-strength micro alloy steels which may require preheat or postheat of the welds to the pipe. Finite element analysis results provided in this study are very useful for the user in assessing the capacity of fittings and is recommended in specification of required design verifications and burst tests.
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