Material tests of composite rings with recyclates for pipe flange connections

Purpose: This study aims to determine the material properties of the structural components of the composite ring material for pipe flange connections. Design/methodology/approach: The study included structural components, in particular resins and composites based on them, characterised by the share of recyclate in the form of post-production waste composites with different degrees of fineness. Findings: The study results include the physical characteristics of resins and mechanical characteristics of composite materials based on their matrix, using fillers of different compositions and granulation. Practical implications: The research results are the material-structural solutions of rings meeting the strength and functional performance criteria of rings intended for circular pipe connections. Originality/value: Determination of structural components of composite for loose rings in pipe flange connections. The achievement of the research is the identification of the most favourable combinations of component materials of composites for rings in structural solutions for pipe flange connections using loose rings.