| Customization: | Available |
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| After-sales Service: | Online Technology Support |
| Warranty: | Online Technology Support |
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Roof Drainage System Aluminum Curved Hopper
An aluminum curved hopper is a key component in roof drainage systems, designed with a smooth, curved profile to optimize water flow and prevent debris accumulation.
Material: Made of lightweight, corrosion-resistant aluminum for durability.
Curved Design: Enhances water drainage efficiency and reduces clogging.
Weather Resistance: Suitable for outdoor use, resistant to rust and UV exposure.
Easy Installation: Compatible with standard roof drainage systems.
Commercial & Residential Roofing - Efficient rainwater collection and diversion.
Industrial Buildings - Handles large water volumes with minimal maintenance.
Green Roof Systems - Supports sustainable drainage solutions.
Material: Made of lightweight, corrosion-resistant aluminum for durability.
Curved Design: Enhances water drainage efficiency and reduces clogging.
Weather Resistance: Suitable for outdoor use, resistant to rust and UV exposure.
Easy Installation: Compatible with standard roof drainage systems.
High Flow Efficiency - Smooth curvature prevents water stagnation.
Low Maintenance - Resists debris buildup and corrosion.
Lightweight & Durable - Long-lasting performance in harsh weather.
Anodizing: Adds a protective oxide layer, enhancing corrosion resistance and surface durability.
Powder Coating: Offers UV protection and customization in terms of color and finish.
Residential: Perfect for homes due to cost-effectiveness, visual compatibility, and easy installation.
Commercial: Ideal for office buildings, schools, and multi-story structures that require efficient water management.
Industrial: Used in warehouses and factories to manage large volumes of rainwater safely and effectively.
Aluminum naturally resists corrosion, making these pipes especially reliable in challenging climates including rainy, snowy, or salty coastal environments.
Requires little more than routine clearing of leaves or debris to prevent blockages.
No special coatings or treatments needed post-installation under normal conditions.
Aluminum rainwater pipes typically last 20-30 years or more with basic maintenance.
Pipes can be customized in terms of length, diameter, shape, and color to suit architectural styles or technical specifications.
Inlet Diameter (D1) - Matches the roof drain size (e.g., 100mm, 150mm, 200mm).
Outlet Diameter (D2) - Connects to downpipes (typically smaller than inlet for controlled flow).
Curvature Radius (R) - Affects flow efficiency; larger radius improves water passage.
Height (H) - Determines hopper depth; impacts debris retention and flow rate.
Wall Thickness (t) - Usually 1.5-3mm for aluminum, balancing strength and weight.
Flow Rate (Q) - Measured in liters/second (L/s) or gallons/minute (GPM), depends on slope and curvature.
Discharge Efficiency - Percentage of water effectively drained without spillage.
Self-Cleaning Ability - Slope angle (≥5° recommended) to prevent debris buildup.
Aluminum Grade - Typically 6061-T6 (high corrosion resistance) or 3003-H14 (good formability).
Surface Treatment - Anodized or powder-coated for extra weather/UV resistance.
Load Capacity - Must withstand static water weight + wind/snow loads (e.g., ≥1.5 kN/m²).
Flange Type - Flanged, welded, or clamped for connection to roof membranes.
Sealing Method - Butyl tape, EPDM gaskets, or liquid-applied sealants.
Slope Alignment - Adjustable brackets for optimal drainage angle.
Debris Filtering - Optional mesh screen size (e.g., 5-10mm openings).
Ice Resistance - Critical for cold climates (heated hopper options available).
Lifespan - 20-30 years with proper maintenance.
ASTM B209 (Aluminum Sheet/Plate Standards)
EN 12056-3 (European Roof Drainage Standards)
AS/NZS 3500.3 (Australian/New Zealand Plumbing Codes)
1. Material Sourcing
Aluminum Alloy: Use high-quality aluminum alloy that meets industry standards. The chosen material should offer excellent strength, corrosion resistance, and long-term durability for outdoor conditions.
Additives and Coatings: Apply protective treatments such as anodizing or powder coating to increase resistance to weathering and UV degradation. Ensure coatings are uniform and securely bonded to the surface of the pipes.
2. Design and Prototyping
Customization: Aluminum rainwater pipes come in various diameters, wall thicknesses, and fittings (e.g., bends, connectors, end caps). Customize dimensions and features based on client specifications and building architecture.
Prototyping: Develop prototypes before large-scale production to test water flow capacity, structural integrity, and installation compatibility. This helps identify and correct design flaws early.
3. Manufacturing Process
Extrusion: Most aluminum pipes are manufactured through the extrusion process, where heated aluminum billets are pushed through a die to achieve a consistent circular or rectangular cross-section.
Tooling & Mold Maintenance: Keep dies and extrusion tools in top condition to ensure precision and reduce defects.
Temperature Control: Maintain optimal temperature settings throughout the extrusion and cooling phases to achieve consistent thickness and avoid warping.
Secondary Forming (Bends & Elbows): Use bending machines or stamping processes to fabricate pipe components like elbows and connectors with high accuracy.
4. Quality Control
Dimensional Inspection: Measure outer diameter, wall thickness, and overall length to ensure they conform to specified tolerances.
Strength Testing: Conduct mechanical tests, including pressure, bending, and impact resistance, to verify structural integrity.
Corrosion Resistance: Perform salt spray or weathering tests to confirm long-term performance in outdoor environments.
Leak & Flow Testing: Verify that joints, seams, and connections maintain watertight integrity under simulated rainfall conditions.
5. Logistics and Distribution
Inventory Management: Monitor raw material levels and finished product inventory using digital systems to ensure efficient production flow and timely deliveries.
Packaging: Use protective, non-abrasive packaging materials to prevent scratches, dents, and deformation during transport. Clearly label each package for ease of identification and installation.
Shipping: Secure and stack aluminum pipes properly in transport vehicles to avoid bending or surface damage. Optimize routes for cost-effective and timely delivery.
6. Customer Feedback and Improvement
Performance Monitoring: Gather field data and client feedback post-installation to assess durability, ease of use, and any operational issues like leakage or blockage.
Continuous Improvement: Analyze production data and customer input regularly. Introduce automation and modern manufacturing technologies where applicable to increase consistency and lower costs.
7. Compliance and Certifications
Building Codes & Standards: Ensure that all aluminum rainwater pipes conform to local and international construction codes and performance standards.
Certifications: Acquire recognized certifications such as ISO, ASTM, or equivalent regional marks to validate quality, environmental safety, and manufacturing reliability.
Key Considerations for Aluminum Rainwater Pipe Production
| Factor | Description |
|---|---|
| Efficiency | Optimize each stage of the manufacturing process to balance cost-efficiency with high product standards. Invest in skilled labor and automation where possible. |
| Environmental Impact | Use recycled aluminum where feasible, minimize scrap, and adopt sustainable packaging practices. |
| Customer Service | Offer technical support, clear installation guidelines, and responsive after-sales service. Maintain an open channel for customer feedback and warranty claims. |
1. Raw Material Quality
Checkpoints:
Confirm the use of high-grade aluminum alloy suitable for outdoor rainwater drainage systems.
Ensure alloy treatment (e.g., anodizing or powder coating) for enhanced weather resistance.
Inspect for impurities or foreign particles in raw material.
Tests:
Visual inspection for surface defects (scratches, dents, oxidation).
Hardness testing for durability.
Chemical composition analysis to validate alloy specifications.
2. Extrusion and Forming Parameters
Checkpoints:
Monitor extrusion temperature, die alignment, and extrusion speed for consistent output.
Ensure correct dies and molds are used to form accurate pipe dimensions and cross-sections.
Targets:
Smooth, uniform pipe walls with consistent thickness.
No internal stress, deformation, or surface waviness.
QC Actions:
Record extrusion parameters per production batch.
Conduct surface checks for cracks, wrinkles, or extrusion blemishes.
3. Dimensional Accuracy
Checkpoints:
Measure outer diameter, wall thickness, roundness, and overall straightness.
Tools:
Calipers, micrometers, laser measuring tools.
Tolerance:
Typically ±0.3 mm depending on pipe size and design specs.
4. Structural Integrity
Checkpoints:
Confirm pipes can handle water load and environmental pressure without deformation.
Tests:
Pressure and burst tests to simulate high water flow.
Impact tests to verify durability against physical stress.
Bending and crush resistance testing.
5. Surface Finish
Checkpoints:
Surface should be clean, free of scratches, marks, and corrosion.
Coating (if applied) must be smooth, consistent, and securely bonded.
Defects to Avoid:
Pitting, oxidation, surface streaks, or color inconsistencies.
6. Joint and Fitment Compatibility
Checkpoints:
Ensure pipes are compatible with connectors, elbows, and other fittings.
Ends should be properly chamfered or shaped for easy joining.
Tests:
Dry-fit and leak test for connections.
Check snap-fit, press-fit, or seal integration based on system design.
7. UV and Weather Resistance
Checkpoints:
Confirm UV stabilizers are present in the alloy or coating.
Check resistance to rain, temperature changes, and prolonged sun exposure.
Tests:
Accelerated UV aging (e.g., QUV test).
Corrosion testing (e.g., salt spray).
Color fastness and gloss retention tests.
8. Slotting/Drilling (if applicable)
Checkpoints:
Verify any slots or holes for brackets or drainage are precisely positioned and clean-cut.
Tools:
Jigs, CNC fixtures, and measuring gauges.
Tolerance:
Positional accuracy within ±1 mm.
9. Final Inspection and Packaging
Checkpoints:
Conduct full visual and dimensional checks before packaging.
Verify length, diameter, and quantity per bundle.
Ensure labels and batch numbers are accurate for traceability.
Packaging QC:
Use protective film or wrapping to prevent scratches.
Stack securely to prevent bending or ovalization during transport.
10. Documentation and Traceability
Maintain detailed production and QC records:
Material batch records and supplier certifications.
Inspection checklists and testing reports.
Operator logs and machine settings.
NCR (Non-Conformance Reports) with root cause analysis and corrective actions.
Summary of Key QC Actions for Aluminum Rainwater Pipe Production
| Quality Control Step | Key Actions |
|---|---|
| Raw Material Quality | Verify alloy grade, purity, and treatment. |
| Extrusion & Forming | Monitor process settings, inspect die condition. |
| Dimensional Accuracy | Use precise tools to measure all critical dimensions. |
| Structural Integrity | Perform burst, impact, and crush tests. |
| Surface Finish | Inspect for coating smoothness and uniform finish. |
| Joint & Fitment Compatibility | Check pipe ends and fitting accuracy. |
| UV & Weather Resistance | Test for UV degradation and corrosion resistance. |
| Slotting/Drilling Accuracy | Ensure accurate hole placement if required. |
| Final Inspection & Packaging | Conduct complete inspections and protect during packing. |
| Documentation & Traceability | Keep thorough records of all quality checks and production. |
1. Preparation and Materials Required
Aluminum rainwater pipes (clean, undamaged, and ready for packaging)
Bubble wrap or foam padding for surface protection
Stretch film or shrink wrap for securing pipe bundles
Corrugated cardboard or protective corner guards for edge protection
Zip ties or packing tape for bundling pipes
Durable strapping (for larger or heavier bundles)
Wooden crates or heavy-duty cardboard boxes (recommended for bulk or long-distance shipments)
Pallet (optional, for large-volume or freight deliveries)
2. Packing Process
a. Clean and Inspect
Ensure all aluminum pipes are clean, dry, and free from surface damage. Inspect each piece for dents, bends, or scratches prior to packing.
b. Bundle Pipes
Group pipes of the same size and length together.
If the pipe design permits, nest them to minimize movement and save space.
Secure the bundles using zip ties, tape, or strapping. Take care not to overtighten to avoid deforming the pipes.
c. Protect Surfaces and Ends
Wrap each bundle in bubble wrap or foam padding to protect against impact.
Use protective corners or corrugated cardboard on both ends and along sides to shield the edges from crushing or abrasions.
d. Wrap the Bundle
Secure the entire bundle using stretch film or shrink wrap to hold the pipes firmly in place during transport. Ensure all pieces are tightly wrapped and stable.
3. Delivery Guidelines
a. Labeling
Apply clear, water-resistant labels to each bundle or package.
Include appropriate handling instructions such as "Fragile," "This Side Up," or "Do Not Stack" as needed.
b. Vehicle Loading
Position the pipes flat and ensure proper support throughout transit. Avoid any overhang or sagging.
Do not stack heavy items on top of the aluminum pipes.
For pipes over 10 feet in length, ensure the delivery vehicle has adequate space and tie-down points to secure the load safely.
c. Use of Pallets (For Bulk Orders)
Place bundles evenly on pallets to ease handling and prevent shifting.
Strap the bundles securely to the pallet, then shrink-wrap the entire load for added stability and protection during shipping.
Applications: Residential: Aluminum gutters are common in homes due to their affordability and ease of installation. Commercial: Used in larger
buildings, often in seamless designs for higher efficiency. Industrial: In large industrial settings, aluminum gutters help manage water runoff in
factories and warehouses.
Rainwater Management
Primary Function: Aluminum gutters efficiently collect and direct rainwater from the roof to downpipes, protecting the building's walls, foundation, and surrounding landscape.
Prevents: Water pooling, soil erosion, foundation damage, mold growth, and exterior wall stains.
Roof Drainage Systems
Installed along roof edges to capture and guide water runoff.
Suitable for residential, commercial, and industrial buildings.
Compatible with various roof types: sloped, flat, tiled, or metal.
Rainwater Harvesting Systems
Aluminum gutters can funnel rainwater into storage tanks for reuse in irrigation, flushing, or even filtration for household use.
Accessories such as leaf guards and first flush diverters are commonly used to enhance water quality.
Fascia Protection
Gutter systems, including aluminum gutters, often include fascia brackets or boards to cover and protect the fascia board from weathering and water damage.
Architectural Aesthetics
Available in various finishes (such as anodized or powder-coated) and profiles to match building design.
Adds to the architectural detailing of the roof edge, providing a clean and modern finish.
Ventilation Drainage
In industrial buildings or large commercial halls, aluminum downpipes may be used as part of HVAC systems to drain condensate efficiently.
| Accessory | Function / Application |
|---|---|
| Downspouts | Direct water from gutters to ground-level drainage or a collection system. |
| Elbows | Change the direction of downpipes (e.g., from vertical to horizontal). |
| End Caps | Seal the ends of the gutter to prevent water leakage and ensure smooth water flow. |
| Gutter Joiners | Securely connect two lengths of gutter, creating a continuous flow path for rainwater. |
| Brackets/Clips | Secure gutters to the fascia board or building structure, ensuring they stay in place. |
| Leaf Guards | Prevent leaves and debris from clogging the gutter system, improving performance. |
| Drop Outlets | Connect gutters to downspouts, creating a smooth and uninterrupted water path. |
| Expansion Joints | Allow movement due to temperature changes, preventing cracking or distortion in the gutter system. |
Introduction to Services Offered by Hangzhou Lin'an Mo Ding Building Materials Co., Ltd.
Founded in 2011 and based in Gaohong Industrial Park, Hangzhou Lin'an Mo Ding Building Materials Co., Ltd. is a high-tech enterprise specializing in the research, development, production, sales, and technical support of advanced building materials. The company is a recognized leader in high-performance drainage systems and eco-friendly construction solutions.
Mo Ding offers a comprehensive range of products and services, including PVC and aluminum alloy drainage systems, wall and ceiling panels, and a full suite of components designed for durability and environmental sustainability. Its flagship product-the Ward high-performance rainwater system-features innovative design and materials that deliver twice the drainage efficiency and exceptional resistance to harsh weather conditions.
The company provides end-to-end solutions, from design consultation and technical guidance to installation and after-sales service. With a strong commitment to quality, Mo Ding adheres to ISO 9001 standards and offers certified, lead-free products that support green building initiatives. Serving both domestic and international markets, Mo Ding partners with architects and developers to deliver stylish, long-lasting, and leak-free drainage solutions for residential, commercial, and landmark projects.
Driven by innovation and sustainable development, Mo Ding continues to expand its global presence and strives to be a leading brand in green building materials.
The high-capacity curved design ensures rapid water flow, eliminating stagnation. Its smooth, wide-mouth inlet and optimized slope prevent water buildup, even during heavy downpours.
Engineered for extreme rainfall, it handles 15-30% more water than standard hoppers, with flow rates up to 25 L/s (6.6 GPM). The curved shape reduces turbulence for faster drainage.
Yes! Its self-cleaning curvature and anti-clog design are ideal for flat or low-slope roofs where pooling is common.
Absolutely. The wide inlet + optional mesh filter keeps debris out while maintaining maximum flow.
Extra-large diameters (200mm-400mm / 8"-16") are recommended for monsoon-prone areas. Custom sizing is available.
Yes-aircraft-grade aluminum (6061-T6) resists corrosion, hail, and UV damage while staying lightweight.
Fits standard downpipes with bolt-on flanges or clamp rings. No welding needed-just seal with EPDM gaskets.
Almost none! Just clear debris seasonally (if unfiltered) and check seals annually.
Yes! Pair it with a heated hopper accessory or ice-melting additives in winter climates.
Contact approved roofing suppliers or order directly from manufacturers for bulk projects.
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