What is it about?
The American Society for Testing and Materials - ASTM Standard E3039-16 developed by CMAT is currently limited to pipe specimens with thickness in the range 6-20 mm and this thickness range covers the majority of oil and gas pipeline applications. However, there is a trend in the pipeline industry to use heavier-wall pipe in the range of 25 mm in thickness, hence a requirement to test thicker drop-weight teat test (DWTT) specimens is needed. Based on an analysis of the underlining scientific principles of E3039, a proportionally large DWTT specimen has been proposed to expand the applicability of the ASTM E3039 standard for specimen thickness range between 20 and 32 mm. In order to meet the ASTM rigours standard development requirements, critical experimental/damage-mechanics modelling validations in collaboration with EUROPIPE GmbH (Germany) have been carried out at CMAT in a PERD project (Fast Ductile Fracture Arrest Methodology and Standard). This paper describes the results in support of the development of the Annex, which has passed the ASTM ballot on Sept. 23, 2018.
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Why is it important?
It extended ASTM E3039 scope.
Perspectives
The work develops standards and methodologies for fast ductile fracture control of high-pressure gas pipelines.
Su Xu
Read the Original
This page is a summary of: CTOA Testing of Thick DWTT Specimens: Experiment and FEA Simulation for Development of an Annex for ASTM E3039, Journal of Testing and Evaluation, May 2019, ASTM International,
DOI: 10.1520/jte20180816.
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