Yingnai FRP Elbow provides controlled changes in flow direction for corrosive industrial piping systems. Smooth internal transitions help reduce hydraulic resistance, while reinforced fiberglass construction maintains strength around the bend. Standard and customized angles, bend radii, diameters, pressure ratings, resin systems and end connections can be engineered for different process and installation requirements.
| Item | Typical Technical Specification |
| Product Name | FRP Elbow |
| Primary Function | Change the direction of flow in an FRP piping system |
| Typical Manufacturing Range | DN25–DN4000 |
| Standard Angles | 11.25°, 22.5°, 30°, 45°, 60° and 90°; other angles can be fabricated |
| Bend Radius | R = 1.0D, 1.5D, 2.0D or 3.0D; long-radius elbows are preferred where pressure loss or abrasion is critical |
| Construction Type | Smooth molded elbow, filament-wound elbow, segmented miter elbow or fabricated sweep elbow |
| End Connections | Butt-and-wrap, bonded socket/spigot, flanged or project-specific joint |
| Typical Pressure Classes | PN6, PN10 and PN16; final laminate is calculated for pressure, temperature and external loads |
| Dimension Symbols | DN, angle θ, centerline radius R, center-to-end dimension A, tangent length L and wall thickness t |
| Resin Options | Isophthalic polyester, vinyl ester, novolac vinyl ester or process-qualified resin |
| Corrosion Barrier | Continuous resin-rich inner layer through the bend and end connections |
| Local Reinforcement | Additional reinforcement at the intrados, extrados, miter joints and end transitions as required |
| Abrasion Option | Additional abrasion-resistant liner can be provided for slurry, solids or high-velocity service |
| Manufacturing Method | Contact molding, filament winding, compression molding or segmented fabrication with external overlamination |
| Inspection | Angle, radius, center-to-end dimensions, end squareness, wall thickness, laminate continuity, cure and pressure test where specified |
| Applicable Standards | ASTM D5685, ASTM D6041, ASTM D3840, ASTM C582 and ASME NM.2 |
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