eccentric reducers are used as needed to maintain the top- or bottom-of-pipe level. Gaskets are mechanical seals, usually ring-shaped, which seal flange joints. Commonly used gaskets are non-metallic (ASME B 16.21), spiral-wound (ASME B 16.20) and ring-joint (ASME B 16.20). Non-metallic gaskets are used with flat- or raised-face flanges. Spiral-wound gaskets are used with raised-face flanges, and ring-joint gaskets are … Continue reading Although reducers are usually concentric