Road & Bridge Drainage

Scenario 1: Road & Bridge Drainage (Suitable for Bridge Deck/Subgrade Projects)

1. Core Requirements & Product Selection

 Large-diameter Key: Large-diameter fittings and drainage valves are required for road & bridge drainage. We integrate resources from over 3 large-diameter fitting manufacturers in China. Regular models (large-diameter carbon steel, wall thickness ≥10mm, DN150–DN300) are in sufficient stock and ship within 10 days. For road & bridge projects with special load requirements (e.g., heavy vehicle rolling), we can coordinate 30-day customized thick-walled models with Chinese manufacturers and provide load test reports to ensure safety.

 Product Specification Matching:

Bridge Deck Drainage Connection: DN250–DN300 flange fittings (suitable for heavy rain drainage). Chinese manufacturers produce high-strength flanges resistant to bridge deck loads.

Subgrade Drainage Connection: DN150–DN200 threaded fittings (suitable for subgrade water drainage, easy threaded installation).

Valve Selection: Large-diameter gate valves (DN250–DN300) for bridge decks (fast opening, suitable for emergency drainage); large-diameter ball valves (DN150–DN200) for subgrades (wear-resistant to sediment). Based on drainage flow, we match Chinese manufacturers with corresponding diameters to ensure drainage efficiency.

 Material Assurance: Fittings are uniformly made of Q345B carbon steel (tensile strength ≥470MPa, good load-bearing capacity). Chinese manufacturers conduct load tests for each batch to ensure resistance to vehicle rolling.

2. Construction & Acceptance Standards

 Installation Specifications:

Install concrete piers for large-diameter fittings (supports weight to avoid settlement); secure flange bolts with double nuts (prevents loosening). We provide installation diagrams from Chinese road & bridge drainage projects for your team’s operation.

Reserve ≥50cm of operating space for valves to facilitate opening/closing. We provide valve installation case references from Chinese road & bridge projects for planning.

 Key Acceptance Indicators:

Flow Test: Main line fitting and valve assembly flow ≥200m³/h (ensures smooth heavy rain drainage).

Pressure Test: Maintain 0.8MPa water pressure for 24 hours with no leakage. We provide acceptance reports from Chinese road & bridge projects to support your project.

3. Common Issues & Solutions

· Issue 1: Large-diameter fittings are easily damaged during transportation.

Solution: Use customized wooden pallet packaging (provided by Chinese manufacturers, 5% cost increase) to protect against transportation damage; coordinate delivery from nearby Chinese ports to reduce long-distance transportation. For reinforced packaging (e.g., iron frames), 30-day customization can be coordinated by integrating packaging resources in China.

· Issue 2: Valves clog due to sediment in drainage water.

Solution: Install "grille filter fittings" before valves (sufficient stock from Chinese manufacturers, 15% more expensive than regular fittings, filters large sediment particles); clean grilles regularly (cleaning tool procurement recommendations provided). For automatic cleaning functions, 30-day customization can be coordinated with Chinese manufacturers to integrate automatic cleaning structures.