Research

This project is the phase 3 of an overarching three-phase research which studies the girth weld failure modes of pipelines. Using computerised modelling, project 3 develops a tool to predict tensile strain capacity of pipeline under weld strength under-matching condition through:

• developing FEA models
• validating the FEA model by comparison with the experimental results
• identifying the major factors affecting the tensile strain capacity
• developing a tool (equations) that provides a basis for the design and/or review of existing under-matched pipelines

The Australian gas pipeline industry uses the assessment tool to better underestand the tensile strain capacity, and specifically tensile strain capacity under various weld strength matching conditions (over and under matching). The tool enables designers and project proponents to optimise designs of pipes whilst still delivering safe and reliable pipelines. For existing pipes the tool  also helps industry with the assessment of susceptibility to failures in the vicinity of girth welds.

Douglas Proud

Research & Utilisation Program Coordinator

douglas.proud@futurefuelscrc.com