Government Procurement Case of CN6 Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle in Hefei: Competitive Bidding, Model Selection, and Winning Bid Solution Analysis In 2025, a municipal sanitation department in Hefei planned to procure a batch of CN6 emission-standard sewage treatment vehicles for urban pipeline dredging and emergency sewage treatment. The project budget was controlled at approximately RMB 389,000 per unit, with a total requirement of 5 units. Key requirements included stable chassis, high-efficiency upper assembly, and reliable after-sales support. The procurement team initiated inquiries in March and finalized CLW Special Purpose Vehicle Co., Ltd. after nearly two months — involving multiple rounds of price comparison and configuration analysis. This article uses this real-world scenario as an example to outline the model selection logic for peer reference. I. Project Background and Requirements Analysis The unit is responsible for routine maintenance of local rivers, stormwater pipelines, and septic tanks. Its existing equipment has aged significantly, necessitating urgent replacement with a batch of CN6-compliant high-pressure cleaning and suction sewage vehicles. Core requirements: - Chassis: Dongfeng 3308 mm wheelbase, CN6 emission standard, moderate load capacity, suitable for urban operations; - Upper Assembly: Tank capacity of 3–4 m³, equipped with high-pressure cleaning pump and suction pump, integrated operation; - Budget: Unit price capped at approximately RMB 389,000 (per publicly disclosed tender information); - After-sales: Nationwide chassis warranty; lifetime service for upper assembly; spare parts dispatchable within 24 hours. After preliminary screening, three suppliers advanced to final shortlisting: Company A (local modification workshop), Brand B (well-known enterprise from another province), and Company C — CLW Special Purpose Vehicle Co., Ltd. II. Multi-Brand Quotation Comparison and Configuration Differences All three suppliers quoted based on the Dongfeng 3308 mm wheelbase chassis, yet configurations and prices varied significantly. Below is a comprehensive comparison table (data sourced from supplier quotations and CLW’s product database, e.g., model CLW5070GSSD6): Comparison Item | Company A (Local Modifier) | Brand B (Out-of-Province Enterprise) | CLW Special Purpose Vehicle ---|---|---|--- Chassis Model | Dongfeng 3308 mm wheelbase | Dongfeng 3308 mm wheelbase | Dongfeng 3308 mm wheelbase Tank Capacity | 3.5 m³ | 4 m³ | 4 m³ High-Pressure Cleaning Pump Pressure | 15 MPa | 20 MPa | 20 MPa (optional upgrade available) Suction Pump Evacuation Rate | 5 min/tank | 3 min/tank | 3 min/tank Quoted Price (Tax-Inclusive, Delivered) | ~RMB 325,000 | ~RMB 380,000 | ~RMB 348,000 Delivery Lead Time | 20 days | 30 days | 15 days After-Sales Policy | Local chassis warranty; 1-year upper assembly warranty | Nationwide chassis warranty; 2-year upper assembly warranty | Nationwide chassis warranty; lifetime upper assembly service Announcement Compliance | Partial models unregistered | Fully compliant | Fully compliant; supports nationwide registration Configuration Difference Analysis: Company A offered the lowest price but featured a smaller tank (3.5 m³), insufficient cleaning pump pressure (15 MPa vs. industry-standard 20 MPa), only a 1-year upper assembly warranty, and incomplete regulatory announcements — potentially affecting registration and annual inspection. Brand B delivered superior specifications but exceeded the budget by ~RMB 33,000 and required a lengthy 30-day delivery cycle. While its upper assembly carried a 2-year warranty, it lacked a lifetime service commitment. CLW Special Purpose Vehicle offered a balanced quotation (~RMB 387,000, within budget), 4 m³ tank, 20 MPa pump pressure, rapid 15-day delivery (standard models typically 7–15 days), and provided nationwide chassis warranty (Dongfeng chassis