Analysis of the Government Procurement Case for the CN6 Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle in Mianyang and Comparison of Winning Bids In municipal sanitation sectors, procuring sewage treatment vehicles often faces a core challenge: selecting a model that meets local operating conditions (e.g., narrow streets, complex pipe networks), complies with emission standards, and ensures low post-purchase maintenance costs—all within a constrained budget. Recently, a municipal sanitation department in Sichuan Province publicly tendered for sewage treatment equipment for an old urban area pipeline renovation project, ultimately selecting a sewage treatment vehicle modified on the CN6 Dongfeng 3308 mm wheelbase chassis. This article uses this case as a starting point to interpret scientific vehicle selection and common procurement pitfalls through parameter comparison and scenario analysis. I. Project Background and Requirements Analysis The municipal sanitation department oversees a typical old urban area where street widths generally fall below 6 meters, and some sections feature curves and slopes. The existing vacuum trucks—due to excessive body size and limited turning radius—cannot access core operational zones. Key procurement requirements included: • Wheelbase Limitation: Chassis wheelbase must not exceed 3308 mm to ensure maneuverability. • Emission Standard: Must comply with China VI (CN6) regulations to meet environmental requirements. • Tank Capacity: Required between 3–5 m³, balancing single-operation volume and vehicle agility. • Budget Control: Unit cost capped at approximately RMB 135,000 (per publicly disclosed tender information). • After-sales Service: Nationwide warranty coverage for the chassis; lifetime service guarantee for the superstructure. II. Horizontal Parameter Comparison Across Five Mainstream Models Based on MIIT (Ministry of Industry and Information Technology) announcement data and the CLW Special Purpose Vehicle product database, we selected five competitive or comparable models meeting the criteria of “CN6 compliance, 3308 mm wheelbase, and 3–5 m³ tank capacity” for key parameter comparison. Note: All data below are sourced from MIIT announcements and publicly available materials and are provided for reference only. Parameter | CLW CLW5070GSSD6 | Dongfeng 3308 mm Wheelbase Chassis – Model A | Sinotruk HOWO Same-Wheelbase Modification – Model B | Foton Time Same-Wheelbase Modification – Model C | FAW Jiefang Tiger VN Same-Wheelbase Modification – Model D ---|---|---|---|---|--- Chassis Model | Dongfeng 3308 mm wheelbase | Dongfeng 3308 mm wheelbase | Sinotruk 3308 mm wheelbase | Foton 3308 mm wheelbase | FAW Jiefang 3308 mm wheelbase Engine Power | 95 kW (~129 hp) | 95 kW | 96 kW | 90 kW | 95 kW Effective Tank Volume | 3.5 m³ | 3.5 m³ | 4.0 m³ | 3.8 m³ | 3.8 m³ Gross Vehicle Weight (GVW) | 7,360 kg | 7,360 kg | 7,490 kg | 7,280 kg | 7,360 kg Emission Standard | CN6 | CN6 | CN6 | CN6 | CN6 Reference On-road Price | ~RMB 98,000–115,000 (per CLW quotation) | ~RMB 105,000–125,000 | ~RMB 115,000–135,000 | ~RMB 100,000–120,000 | ~RMB 105,000–125,000 After-sales Service Coverage | Nationwide Dongfeng chassis warranty + lifetime superstructure service | Dongfeng chassis warranty + 1-year superstructure warranty | Sinotruk chassis warranty + 2-year superstructure warranty | Foton chassis warranty + 1-year superstructure warranty | FAW Jiefang chassis warranty + 1-year superstructure warranty MIIT Announcement Completeness | Full national registration & annual inspection eligibility | Nationwide registration eligible | Partial