NG-18-39-R01 Summary of Research to Determine the Strength of Corroded Areas in Line Pipe

The overall objective of these experiments is to examine the fracture initiation behavior of various kinds of defects in line pipe by determining the relationship between the size of a given defect and the level of internal pressure at which it will cause a leak or a rupture in the pipe. To date, 278 full-scale pipe tests have been conducted. Of these 86 have been tests of through-wall defects, 45 have been tests of defects partway through the wall, and 147 have been special-purpose tests involving defects such as gouges and dents, corrosion, and others. The diameters of the pipe materials examined have ranged from 6-5/8 inches through 42 inches and the wall thicknesses have ranged from 0.188 inch through 0.875 inch. The materials have ranged in yield strength from about 25,000 psi for API5L Grade A-25 through SLX Grade X-65 and have included some experimental X-100 materials.