A hygienic concentric reducer is a cone-shaped fitting used to smoothly transition between different pipe diameters while maintaining a single, shared centerline to prevent product accumulation and bacterial growth in sanitary systems. They are specifically designed for applications where cleanliness is paramount, such as in the food, beverage, and pharmaceutical industries.
Key Features and Standards
These reducers are engineered to meet strict hygiene requirements and are available in specific materials and finishes.
Material: Primarily manufactured from AISI 304L or AISI 316L stainless steel, with 316L being preferred for its superior corrosion resistance in acidic or high-chloride environments.
Design: The symmetrical conical shape ensures a smooth, uninterrupted fluid flow, minimizing turbulence and pressure loss. They are typically used in vertical pipe runs to ensure proper drainage.
Surface Finish: The internal surface is critical for hygiene and features a smooth, crevice-free finish achieved through bead rolling (removing internal weld beads) or polishing to a specific roughness average (Ra 0.51 µm or lower).
Standards: Conform to key industry standards, including BS 4825 Part 2, EN 10357, ISO 2037, and ASME BPE (BioProcessing Equipment), which dictate dimensional and surface finish requirements.
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