Project Background: Sewer Cleaning Challenge in the Old Urban Area of Dandong City, Liaoning Province In May 2025, the Housing and Urban-Rural Development Bureau of Dandong City, Liaoning Province, launched a three-year drainage system renovation project to address severe sewer blockages and frequent urban flooding during the rainy season in the city’s old urban area. A core requirement of the project was the procurement of highly efficient and maneuverable sewer cleaning equipment capable of clearing sediment from stormwater inlets, inspection chambers, and pipelines along both major roads and narrow alleys. Dandong City is located on the coast, with a high groundwater table and extremely wet sludge (average moisture content exceeding 80%). Moreover, roads in the old urban area are narrow—rendering large-scale cleaning vehicles inaccessible—and traditional manual cleaning methods suffer from low efficiency and significant safety hazards. After comprehensive evaluation, the project authority selected six units of Chengli Special-Purpose Automobile Co., Ltd.’s Dongfeng dual-cab blue-plate 3-cubic-meter sewer cleaning trucks (Model: CLW5040TQYD6), with a total contract value of RMB 690,000 (tax-inclusive landed price; RMB 128,000 per unit). Key Project Background Data: - Project Launch Date: May 2025 - Procured Equipment: Chengli Dongfeng Dual-Cab Blue-Plate 3 m³ Sewer Cleaning Truck (CLW5040TQYD6) - Quantity Procured: 6 units - Total Contract Value: RMB 690,000 (tax-inclusive landed price) - Project Duration: 3 years (2025–2028) - Service Areas: Zhongxing District and Yuanbao District, old urban area of Dandong City Solution: Chengli Dongfeng Dual-Cab Blue-Plate 3 m³ Sewer Cleaning Truck Precisely Meets Requirements To address the unique operational conditions in Dandong, Chengli Special-Purpose Automobile provided a customized solution. The Dongfeng dual-cab blue-plate sewer cleaning truck is built on the Dongfeng chassis (Model: EQ1045SJ16DC), powered by a Quanchai 95-horsepower engine meeting China VI emission standards. With compact overall dimensions of only 5,995 × 1,950 × 2,500 mm and a wheelbase of 2,800 mm, it is fully drivable with a Class C1 driver’s license—ideal for navigating narrow streets. Its 3 m³ tank is equipped with both a high-pressure cleaning system (16 MPa) and a vacuum suction system (8-meter suction lift), enabling simultaneous flushing and suction operations. Its cleaning efficiency exceeds manual labor by more than 15-fold. Chengli’s direct-sales model eliminates intermediaries, saving approximately RMB 12,000 per unit versus equivalent configurations sourced through 4S dealerships. All required regulatory approvals were secured, and the vehicles were successfully registered as blue-plate non-commercial vehicles at Dandong’s Vehicle Administration Office. Core Configuration Parameters: | Parameter | Chengli Dongfeng Dual-Cab Blue-Plate 3 m³ Sewer Cleaning Truck | Industry Average (Same Class) | |-----------|---------------------------------------------------------------|-------------------------------| | Chassis Model | Dongfeng EQ1045SJ16DC | Foton / Jianghuai, etc. | | Engine | Quanchai 95 hp (China VI) | 80–100 hp | | Tank Capacity | 3 m³ | 2–3.5 m³ | | High-Pressure Cleaning Pressure | 16 MPa | 12–15 MPa | | Vacuum Suction Lift | 8 m | 6–8 m | | Overall Dimensions (L×W×H) | 5,995 × 1,950 × 2,500 mm | 6,000 × 2,000 × 2,600 mm | | Wheelbase | 2,800 mm | 2,600–3,000 mm | | Required Driver’s License | Class C1 | Class C1 or B2 | | Tax-Inclusive Landed Price (RMB 10,000) | 11.5 | 13–15 | *Note: Prices above reflect the Dandong project procurement cost as of May 2025, inclusive of freight, registration fees, and first-year insurance.* Implementation Results: 300% Efficiency Improvement, Flood Risk Significantly Mitigated