Case Study and Winning Bid Analysis of the 24 m³ Sinotruk Sludge Tipper Truck Procurement Project in Nanchong — Chengli Special Purpose Vehicle Co., Ltd. | Hotline: | Sales Manager Zhang Yue: I. Project Background and Procurement Requirements In 2025, a municipal sanitation department in Nanchong aimed to enhance urban sludge disposal efficiency and planned to procure a batch of 24 m³ sludge tipper trucks built on Sinotruk chassis. In line with local procurement practices, this tender sought to address sludge transportation challenges arising from wastewater treatment plants and pipeline desilting operations. Vehicles were required to feature excellent sealing performance, high tipping efficiency, and strong adaptability to complex road conditions. The unit budget was controlled at approximately RMB 320,000–400,000 per unit; a total of four units were to be procured, with an overall budget of roughly RMB 1.371–1.6 million (based on publicly disclosed tender information). Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as “Chengli”), a leading domestic special-purpose vehicle manufacturer, leveraged its extensive experience in Sinotruk-chassis modifications, comprehensive after-sales service network, and China VI-compliant emission models meeting Nanchong’s environmental standards to successfully deliver four 24 m³ sludge tipper trucks. This article provides a comprehensive analysis of the case across key dimensions including the tender specifications, vehicle configuration, and winter operation guidelines. II. Tender Specifications vs. Chengli’s Winning Bid Proposal The procurement emphasized three critical criteria: vehicle sealing performance, reliability of the hydraulic tipping system, and chassis load-bearing capacity. Chengli’s CLW5250ZWXZ6 sludge tipper truck (referencing MIIT announcement parameters) fully satisfied all tender requirements. Key parameter comparison is shown below: Comparison Item | Tender Requirement | Chengli’s Winning Proposal (CLW5250ZWXZ6) Chassis Brand | Sinotruk or equivalent brand | Sinotruk HOWO (China VI emission standard) Cargo Body Capacity | ≥24 m³ | 24.2 m³ (MIIT-announced volume) Engine Power | ≥220 hp | Weichai 220 hp (WP7.220E61) Tipping Method | Hydraulic lifting, rear tipping | Dual-cylinder hydraulic lifting, rear tipping Sealing System | Fully sealed, anti-leakage | Hydraulic locking seal + integrated wastewater collection tank Tire Specification | 11.00R20 | 11.00R20 steel-belted radial tires (including spare tire) Vehicle Warranty | Chassis: 2 years / Body: 1 year | Sinotruk chassis covered under nationwide warranty; Chengli bodywork offers lifetime service Delivery Lead Time | ≤30 working days | 25 working days (direct shipment from Suizhou production base) Unit Price (Reference) | ~RMB 280,000–350,000 | RMB 298,000 (tax-inclusive delivered price) Note: Above parameters and pricing are based on publicly disclosed tender documents and Chengli’s product database; actual terms shall prevail per contract. Advantages of Chengli’s proposal include: 1) Full regulatory compliance: CLW5250ZWXZ6 is listed in the MIIT Announcement, enabling nationwide registration; 2) Nationwide chassis warranty: Sinotruk chassis can be serviced at authorized service stations in Nanchong; 3) Advanced sealing design: Hydraulic locking seal combined with a wastewater collection tank effectively prevents leakage during transport, fully complying with environmental protection requirements. III. Winter Operation Maintenance and Cold-Start Recommendations Although Nanchong does not experience extreme cold, winter temperatures may drop below 0°C—especially overnight—potentially affecting engine starting and hydraulic system performance. Drawing upon Chengli’s after-sales service expertise, the following are key winter maintenance tips for sludge tipper trucks: 1.