Application‑based Lens expansion Joints segmentation allocates market share across five core sectors: HVAC systems, power generation, water treatment, oil & gas, and miscellaneous industrial uses. HVAC installations, driven by extensive ductwork and the need for thermal expansion compensation, capture the largest slice at approximately 30 % of total sales. Power generation facilities, especially thermal and nuclear plants, demand robust joints for turbine and boiler connections, contributing around 25 % of revenue. Water treatment plants rely on corrosion‑resistant joints for piping networks, representing 20 % of the market. The oil & gas sector, characterized by high‑pressure pipelines and harsh chemical exposure, accounts for 15 % of sales. Remaining industrial applications—such as chemical processing, food & beverage, and pharmaceuticals—collectively hold the final 10 %. This application‑centric breakdown, illustrated in the accompanying pie chart, clarifies how each vertical sustains the overall market size and guides targeted product development.