In March 2020, the Executive Assembly of PRCI approved Crack Management (CM) as a Strategic Research Priority (SRP). To help refine the scope of PRCI's crack-related research over the next few years, the MAT-8-3 project team of the Design, Materials,…
The American Petroleum Institute (API) initiated this project through Pipeline Research Council International, Inc. (PRCI), to apprise industry consensus recommended practices regarding reasonable and prudent crack in-line inspection (ILI) response…
The project objective is to build and test an Electro-Magnetic Acoustic Transducer (EMAT) tool prototype to detect and quantify longitudinal cracks in metallic pipes. The sensor will be used to assess small diameter and unpiggable pipes containing…
Although steels behave in a ductile manner in a simple tensile test, they sometimes crack in a brittle fashion when subjected to fairly low service stresses. In order to understand and to control this brittle or cleavage fracture in line pipe, a…
A treatment of crack propagation in steel, in terms of stress and strain rather than energy, is derived which takes into account the time rate of plastic deformation at the crack tip. Formulations of (1) the yielding of steel in terms of dislocation…
This project developed intelligent flaw interaction rules that can account more accurately the impact of multiple cracks without being overly conservative. These rules use the principles of equivalent impact among multiple interacting cracks and…
This focuses on the development of a theoretical model for unstable crack propagation and crack arrest in a pressurized pipeline is extended in this paper by including the effect of backfill. The approach being developed involves four essential…
The purpose of this research has been to determine the primary types of defects that cause leaks and fractures in buried pipelines and the effect of environmental factors on these defects. Of particular interest are those defect types which fracture…
ASME B31.8 states that "Dents that contain stress corrosion cracking or other cracks are injurious to the pipeline" and therefore, requires immediate attention by the Operators. Dent containing crack fields (colonies) are often observed in liquid…