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This analysis indicates reduction in the failure pressure due to unfavorable residual stresses.
Failure pressure of an intact pipeline with fixed ends is derived analytically.
GPD (Global Plastic Deformation) was used as an indicator of the failure pressure.
The effects of scratch length and depth on failure pressure with various dent depths are obtained.
Failure pressure estimates were found to be in good agreement with test results.
Generally, the failure pressure of corroded pipelines decreases with the increasing interaction effect between corrosion defects.
Tests were carried out to determine reduction in failure pressure at room temperature.
This results in a higher failure pressure for the same wetted area fraction.
The Maximum Operating Pressure (MOP) is calculated from the failure pressure using an appropriate safety factor.
To find out the effect of residual stresses on failure pressure, first an elasto-plastic analysis is performed to find out the failure pressure of pressure vessel not having residual stresses.
On the basis of developed regression equations for failure pressure prediction of high strength pipeline with single corrosion, the paper proposes an assessment procedure for predicting failure pressure of high strength pipeline with multiple corrosions.
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