The Bead Diagnostic Instrument (BDI) was created alongside a new generation of tools.
This instrument aims to provide installers with a convenient solution for both the easy removal of butt fusion joint beads and subsequent testing in a consistent and repeatable manner. Unlike the widely recognized bend back test, which is challenging to execute on larger sizes and only assesses the bead intermittently along its length, the BDI sets itself apart by evaluating up to 95% of the bead. This ensures a controlled and recorded test that can be effortlessly replicated on-site.
Throughout the development process of the BDI, a thorough assessment was conducted, involving over 450 butt fusion joints. Additionally, over 4,000 individual tensile tests were performed following the guidelines of WIS 4-32-08. The tests encompassed pipes ranging from 110mm to 1,000mm in size, and a diverse range of contaminants, such as particulate/talc, hydrocarbon/grease, and platelet/clay, were utilized.