Segmentation by type differentiates UF membranes according to their structural configuration, each offering a unique balance of flux, fouling resistance, and installation footprint. Hollow‑fiber membranes, the most widely deployed, provide high surface‑area‑to‑volume ratios and are favored in large‑scale municipal plants where modular scalability is paramount. Spiral‑wound designs deliver compact footprints and superior pressure handling, making them suitable for industrial facilities with limited plant space and higher operating pressures. Flat‑sheet membranes excel in pilot‑scale trials and niche applications requiring easy module replacement and precise cleaning protocols, often used in research or small‑scale offshore units. Tubular membranes, though less common, offer robust mechanical strength and tolerance to abrasive feed streams, positioning them for harsh industrial environments such as seawater‑intensive cooling towers. The relative market share of each type aligns with the application profile; for instance, hollow‑fiber dominates municipal segments, while spiral‑wound gains traction in offshore and industrial settings, collectively shaping the overall market composition.