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
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.
ABSTRACT
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.
