# Smooth Bore vs Convoluted PTFE Hose: Complete Comparison > Smooth bore vs convoluted PTFE hose: the internal surface profile is the single biggest determinant of flow performance, flexibility, cleanability, and cost. Ch Source: https://aftubes.com/blog/smooth-bore-vs-convoluted-ptfe-hose-comparison/ --- [Home](https://aftubes.com/)›[Blog](https://aftubes.com/blog)›Smooth Bore vs Convoluted PTFE Hose: Com… PTFE Hoses ## Smooth Bore vs Convoluted PTFE Hose: Complete Comparison ![Savio Pereira](https://aftubes.com/uploads/author-savio-pereira.webp) Savio Pereira Chemical Engineer · 18 years in fluoropolymer processing January 14, 2026 8 min read The internal surface profile of a PTFE hose (smooth or convoluted) is the single biggest determinant of flow performance, flexibility, cleanability, and cost. Smooth bore and convoluted are not interchangeable constructions. Choosing the wrong one for your application compromises either performance or the budget without any compensating benefit. ### Smooth Bore PTFE Hose Smooth bore hose features a uniform, uninterrupted internal surface with a coefficient of friction of approximately 0.04–0.10. The bore is fully self-draining and can be cleaned with pig tools or CIP chemical cycles without fluid retention. - 20–30% better flow efficiency versus equivalent convoluted bore. - Fully self-draining: no fluid retained between uses. - Full CIP/SIP cleanability: pharmaceutical and food-grade standard choice. - Lower particle generation: smooth surface eliminates entrapment and release of particles. - Wider range of standard end fittings available from stock. ### Convoluted (Corrugated) Bore PTFE Hose Convoluted bore hose has accordion-fold corrugations moulded into the PTFE inner. The profile allows tighter bending than smooth bore without kinking or collapsing the liner, typically 30–40% tighter minimum bend radius. - 30–40% tighter minimum bend radius versus smooth bore of the same OD. - Superior vibration absorption: corrugations damp axial stress and shock loads. - Typically 20–30% lower cost than smooth bore equivalent. - Good vacuum resistance: corrugated profile resists collapse under negative pressure. - Preferred for dynamic applications where the hose flexes in service. ### Side-by-Side Comparison | Property | Smooth Bore | Convoluted Bore | | --- | --- | --- | | Flow Efficiency | 20–30% better | Baseline | | Minimum Bend Radius | Larger | 30–40% tighter | | Cleanability / CIP | Excellent: self-draining | Fluid retention in valleys | | Vibration Isolation | Limited | Excellent | | Relative Cost | Higher | 20–30% lower | | Pharmaceutical Suitability | Standard choice | Not recommended for CIP processes | | Dynamic Applications | Possible, not ideal | Preferred construction | ### Material Properties Are Identical Both smooth and convoluted bore PTFE hose share the same material properties: temperature range (–65°C to +260°C), chemical resistance (virtually universal), and FDA 21 CFR 177.1550 compliance where virgin PTFE is specified. The difference is entirely structural, not material. You do not get better or worse chemical resistance from one profile versus the other. Selection Rule Default to smooth bore. Specify convoluted only when the installation requires tighter bends than smooth bore allows, when the hose must flex repeatedly in service (dynamic application), or when vibration isolation is a primary requirement. Never specify convoluted bore for pharmaceutical or food CIP applications. PTFE Hose Options [SS304 Braided (Smooth Bore) →](https://aftubes.com/ptfe-braided-ss304-hose)[Corrugated Convoluted Hose →](https://aftubes.com/ptfe-corrugated-convoluted-hose)[All PTFE Hoses →](https://aftubes.com/ptfe-hose) ![Savio Pereira](https://aftubes.com/uploads/author-savio-pereira.webp) Article by Savio Pereira Savio Pereira is a Chemical Engineer who has held leadership roles in companies like IBM. A passionate problem solver who thrives at finding solutions to engineering and business problems alike using simple innovative ideas. He believes in doing things differently rather than doing different things. His vision is to make Advanced Fluro (P) Ltd the most valuable company in the fluouro polymer industry. In This Article Have a Technical Question? Our engineering team advises on material selection, specifications, and your specific application. Contact Technical Team WhatsApp Us Related Articles [PTFE HosesPTFE Tube Flexible Hose: Complete Technical Guide for Industrial Applications12 min read](https://aftubes.com/blog/ptfe-tube-flexible-hose)[PTFE HosesPTFE Stainless Steel Braided Hose: In-Stock vs. Custom Options7 min read](https://aftubes.com/blog/stock-vs-custom-ptfe-stainless-steel-braided-hose)[AutomotivePTFE Brake Hose: Performance Upgrade Guide7 min read](https://aftubes.com/blog/ptfe-brake-hose) Advanced Fluro Private Limited ### Need Technical Guidance? 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