90 DEG ELBOW PRODUCT MANUAL
1. Product Overview
- Definition: A 90° elbow is a pipe fitting used to redirect fluid flow by 90 degrees, enabling adjustments in pipeline layouts. It is widely applied in scenarios requiring right-angle connections.
- Types:
- By Radius of Curvature: Long radius elbows (R=1.5D) and short radius elbows (R=1D).
- By Manufacturing Process: Welded elbows, stamped elbows, pushed elbows, and cast elbows.
- Materials: Cast iron, stainless steel (304/316L), alloy steel, carbon steel, non-ferrous metals, and plastics (e.g., PVC, PVC-U, PPH, PVDF, FRPP), catering to various media and environmental requirements.
2. Technical Specifications
Parameter |
Details |
Size Range |
Diameter: DN15-DN2000 and above, compliant with multiple pipeline standards (e.g., GB, ASME, DIN). |
Pressure Rating |
Metals: PN10-PN40; Plastics: Below PN10. |
Temperature Range |
Metals: -80°C to 450°C; Plastics: -10°C to 60°C (material-dependent). |
Standards |
GB/T12459, GB/T13401, ASME B16.9, DIN 2616, etc. |
Surface Finish |
Polished (Ra≤0.8μm), galvanized, powder-coated, anti-corrosion coating, etc. |
3. Key Advantages
- Fluid Efficiency: Smooth transitions minimize fluid resistance, enhancing flow and reducing pressure loss.
- Space Optimization: Right-angle design saves installation space, enabling compact pipeline layouts.
- Material Versatility: Multiple material options suit various media, including corrosive, high-temperature, and high-pressure environments.
- Easy Installation: Supports welding, flange, threaded, and other connection methods for diverse applications.
4. Applications
Industry |
Use Cases |
Petrochemical |
Heat exchangers, reactors, catalyst delivery systems. |
Building Services |
Roof drainage, basement sewage, siphonic rainwater systems. |
HVAC |
Coolant circulation, fan coil connections. |
Laboratories |
Pressure gauges, fluid dynamics experiments. |
Food Processing |
CIP cleaning, dairy transport (316L stainless steel). |
5. Certifications & Testing
- Quality Systems: ISO 9001, PED 2014/68/EU, ASME.
- Testing:
- Hydrostatic (1.5× working pressure, 5-min hold).
- NDT (UT/RT), intergranular corrosion (ASTM A262).
- Ball-passing test (ball diameter ≥0.8× inner diameter).
- Test Standards: GB/T 13912 (galvanized layer thickness), ASTM A262 (intergranular corrosion).
6. Selection Guide
- Media & Temperature:
- Corrosive media: 316L stainless steel or PVC-U.
- High-temperature: Carbon steel or alloy steel.
- Pressure:
- High-pressure: Seamless steel + welding.
- Low-pressure: Plastics + adhesive bonding.
- Space Constraints:
- Compact areas: Small-diameter elbows (DN15-DN50).
- Large diameters: Welded elbows (≥DN600).
- Connection Method:
- Choose flange, threaded, or welded connections based on pipeline requirements.
7. Maintenance
- Regular Inspection: Check threads, welds, and sealing surfaces for leaks.
- Cleaning:
- Stainless steel: Wipe with alcohol; avoid scratches.
- Plastics: Avoid organic solvents.
- Corrosion Prevention:
- Metals: Apply anti-rust oil periodically.
- Plastics: Avoid UV exposure; replace aging seals.
- Storage: Store in a dry, ventilated area; avoid outdoor storage or stacking.







