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June 28, 2019
Category: Research Update 

Research Project Update June 2019

Several research projects were finalised in June, bringing the total number of completed research projects to 107, the number of published milestone reports to 300, and the conference and journal papers to 250 across the four programs of the Energy Pipelines CRC. A summary of final findings for some completed research projects is provided below. The reports for all projects are accessible via the members’ area of the Energy Pipelines CRC website.

The outcomes of project RP2-09C: ‘Manufacturing processes for SCC resistance’ show that SCC susceptibility is linked to the crystallographic texture formed through different manufacturing processes which should be considered; e.g. pipe should be produced through warm rolling in areas where SCC is prominent as it provides the lowest measured SCC susceptibility to the pipe. The results also suggest that improving SCC susceptibility may be at the cost of lower mechanical properties so may only be practical for projects that can accommodate lower grade pipe.

The final report of project RP6.2-04B: ‘Shore crossing cathodic protection test program - Phase 2’ indicates that, in drained soils, regardless of the resistivity of the soils, CP could not be achieved for onshore pipes via the galvanic anodes. Smaller CP current densities and lower CP potential levels were recorded on steel samples in unsaturated soil compared to the recorded values on samples in saturated soil. Also, with respect to passivation and re-activation of submarine galvanic anodes, no measurable, long term, adverse effects of cathodically polarising sacrificial anode using an external source of current were observed. The outcomes of this research will be implemented into the ‘Shoreline and Waterway Crossing Guideline’.

Project RP2-16: ‘Assessing coating integrity and CP efficiency of HDD pipelines’ was also successfully finalised. This project resulted in the development of a novel method for detecting the location and size of coating defects, as well as CP efficiency at coating defects under HDD pipeline conditions. This tool can be used for assessment of the in-service pipelines and can be installed together with the pipeline during HDD process. This method is based on combined electrochemical impedance spectroscopy (EIS) and cathodic protection (CP) current measurements. The performance of the tool was successfully examined in a simulated field condition on land at Deakin University. An international patent has been filed to protect IP right for this innovative tool.

The outcome of the project of RP6.3-13: ‘Fracture control code of practice’ is a guideline that aids designers and pipeline owners in controlling pipeline fracture. This document also provides an accessible summary of the research conducted by the Energy Pipelines CRC on simulation of the pipeline fracture and fracture arrest techniques. It provides guidance on the application of the various analysis methods available to the complicated multi-dimensional problem of fracture control.

Project RP3-13: ‘EPCRC Fracture velocity model’ is the final of a series of projects which resulted in development of the EPDECOM software. This project improved and validated the EPCRC fracture velocity model and resulted in an updated version of EPDECOM. This new version has the ability to load a decompression curve file, to calculate and display the phase boundary for the mixture in the pressure–temperature plane and has the ability to plot certain thermodynamic property as a function of any other along the decompression path.


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