I. Case Background: Sludge Transport Vehicle Procurement Requirement by Qingdao Municipal Sanitation Department In Q3 2025, the Urban Management Bureau of a district in Qingdao planned to procure a batch of sludge tipper trucks to enhance efficiency in maintaining local sewage pipeline networks, specifically for transporting sludge following municipal pipeline dredging operations. After multiple rounds of research and solution evaluation, the Dongfeng D6 blue license plate, 3-cubic-meter sludge tipper truck was selected, with Chengli Special Purpose Vehicle Co., Ltd. responsible for delivery. Thanks to its compact body dimensions, C-class driver’s license compatibility (blue plate), and compliance with registration regulations, this model has become a standard configuration for local sanitation operations. Per local procurement practices, the unit price for this batch of vehicles is approximately RMB 110,000–130,000 (based on publicly available tender information), with the total budget capped at RMB 443,000. Chengli provided transparent configuration lists and end-to-end service for this project—chassis procurement and superstructure modification were both completed locally in Suizhou. Standard-model delivery lead time is approximately 15 days. II. Comparative Analysis of Key Parameters Across Five Mainstream Blue-Plate Sludge Tipper Trucks To assist procurement units in rapid comparison, we have compiled core technical parameters for five mainstream 3-cubic-meter blue-plate sludge tipper trucks—including the Chengli Dongfeng D6 (data sourced from MIIT announcements and Chengli’s product database; model example: CLW5070GSSD6). Parameter | Chengli Dongfeng D6 (CLW5070GSSD6) | Competitor A | Competitor B | Competitor C | Competitor D ---|---|---|---|---|--- Chassis Brand | Dongfeng | Foton | Sinotruk | Shaanxi Automobile | FAW Jiefang Emission Standard | China VI | China VI | China VI | China VI | China VI Tank Volume | 3 m³ | 3 m³ | 3.2 m³ | 2.8 m³ | 3 m³ Engine Power | 85 kW | 80 kW | 88 kW | 82 kW | 86 kW Overall Dimensions (mm) | 5000 × 1900 × 2200 | 5100 × 1950 × 2300 | 4950 × 1880 × 2150 | 5050 × 1920 × 2250 | 5080 × 1930 × 2280 Gross Vehicle Weight (kg) | 4495 | 4495 | 4495 | 4495 | 4495 Rated Payload (kg) | 1500 | 1450 | 1550 | 1400 | 1500 Driver Cabin Seating Capacity | 2 persons | 2 persons | 2 persons | 2 persons | 2 persons Wheelbase (mm) | 2800 | 2700 | 2850 | 2750 | 2820 Sludge Discharge Method | Hydraulic tipping | Hydraulic tipping | Hydraulic tipping | Hydraulic tipping | Hydraulic tipping Reference Unit Price (RMB 10,000s) | 11–13 | 12–14 | 13–15 | 11.5–13.5 | 12–14 After-Sales Support | Nationwide Dongfeng chassis warranty + lifetime superstructure service | Chassis warranty + 2-year superstructure service | Chassis warranty + 3-year superstructure service | Chassis warranty + 2-year superstructure service | Chassis warranty + 2-year superstructure service As shown above, the Chengli Dongfeng D6 demonstrates balanced performance across tank volume, rated payload, chassis brand reliability, and after-sales support. Notably, the nationwide Dongfeng chassis warranty combined with Chengli’s lifetime superstructure service—including 24-hour direct shipment of spare parts—emerged as key decision-making advantages for the procurement unit. III. Dimensional Comparative Analysis 1. Chassis & Brand Reliability Dongfeng chassis, as a leading domestic commercial vehicle brand, maintains strong market presence and proven reliability in municipal sanitation applications.