Liner
Definition & Core Function
A liner in sanitary applications refers to a removable/internal sleeve that maintains hygiene by preventing product buildup in pipe fittings (e.g., tees, elbows)
Primary roles:
Contamination prevention: Isolates fluids from direct contact with welded joints
Cleanability: Smooth electropolished surface (Ra ≤0.8μm) reduces bacterial adhesion
Technical Specifications
Material: 316L stainless steel (most common) or FDA-approved polymers
Compatibility: Designed for use with sanitary welded fittings (tees, reducers) per 3A/ASME BPE standards
Pressure/temperature: Matches host fitting ratings (typically ≤2000LBS, -20°C to 135°C)
Applications
Dairy/pharmaceutical: Critical for CIP/SIP processes
Brewing: Prevents yeast/sediment accumulation in fermentation lines
