Proceedings of the

The 33rd European Safety and Reliability Conference (ESREL 2023)
3 – 8 September 2023, Southampton, UK

Methodology for Extracting Reliability from the Qualification Tests ISO 23936-2

Rafael Azevedo1,a, Eduardo Menezes1, Caio Souto Maior1, Márcio Moura1, Isis Lins1, Feliciano Da Silva2,b and Marcus Vinicius Magalhàes2

1Center for Risk Analysis, Reliability Engineering and Environmental Modeling (CEERMA), Federal University of Pernambuco, Recife, Brazil.

2CENPES - Research Center Leopoldo Américo Miguez de Mello, Petrobras, Rio de Janeiro, Brazil.


In the O&G production chain, the presence of non-metalic materials is widely spread in several applications, often as a critical component. In this context, the equipment manufacturers are claimed to standard-proof their products and systems relative to material requirements. This process is mandatorily ruled by the qualification standard ISO-23936, which establishes the baseline procedures for testing non-metalic materials for use in O&G production. The standard determines pressure, temperature, loads, and number of specimens required for the qualification process of the material, and as a result, presents a procedure for the lifetime estimation under operating conditions. However, the ISO-23936 does not present guidelines to extract a reliability measure from the samples tested in many different conditions. In this work, a methodology to use the data coming from the tests of ISO-23936 with the aim of obtaining reliability estimation is presented and an O&G industry case study is performed. Additionally, the discussion about ISO 23936 lifetime traditional approach and reliability methods is carried out, emphasizing the difference between them.

Keywords: O&G industry, Reliability estimation, Qualification tests, Elastomers properties, ISO standards.

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