Wenzhou Municipal Government Procurement Case: Dongfeng Single-Cab Sewer Cleaning Truck (Blue License Plate, 5 m³) — A Comprehensive Review from Vehicle Selection to Acceptance. In early 2026, a municipal sanitation department in Wenzhou (hereinafter referred to as the 'Procuring Entity') publicly tendered for a batch of blue license plate, 5 m³ sewer cleaning trucks to meet local stormwater and sewage pipeline desilting requirements. After multiple rounds of technical evaluation and commercial negotiations, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter 'Chengli') was selected to supply Dongfeng single-cab chassis-based sewer cleaning trucks, with a unit price of approximately RMB 158,000 (based on publicly available tender information). This article details the 10 key acceptance items, MIIT parameter verification methods, Chengli’s delivery process assurance, and special optimization measures for southern China’s humid and hot climate, providing a reusable standard reference for similar procurement entities. The Procuring Entity is located in Wenzhou, a region characterized by a typical subtropical monsoon climate, with an average annual rainfall of approximately 1,700 mm. Rainy seasons are concentrated and humidity levels remain persistently high. The sewer cleaning trucks must operate reliably under frequent usage (over 80% monthly utilization during rainy seasons) and prolonged exposure to high-humidity conditions—imposing stringent requirements on anti-corrosion coatings, sealing component durability, and high-load operational stability. In response to these requirements, Chengli customized the CLW5070GSSD6 model (based on the Dongfeng single-cab chassis), fully compliant with China VI emission standards, with complete official vehicle type approvals, ensuring nationwide registration, annual inspection, and normal operation. I. Ten Mandatory Inspection Items Upon Vehicle Acceptance: A Wenzhou-Specific Acceptance Checklist Based on contractual terms between the Procuring Entity and Chengli, as well as on-site guidance provided by Chengli’s after-sales team, the following 10 items must be verified one-by-one during vehicle acceptance. Given Wenzhou’s high humidity and intensive rainy-season operations, particular emphasis has been placed on corrosion resistance and sealing integrity. Wenzhou Dongfeng Single-Cab Sewer Cleaning Truck (Blue License Plate, 5 m³) — Vehicle Acceptance Checklist (Referenced against Public Tender Information and Chengli Product Database) No. | Acceptance Item | Acceptance Criteria | Wenzhou Environmental Priority Considerations | Chengli Assurance Measures ---|----------------|---------------------|---------------------------------------------|-------------------------- 1 | Chassis Appearance & Anti-Corrosion Coating | No rust or scratches; uniform chassis paint application | Critical inspection areas include frame, suspension connection points, and bolt holes—high humidity in Wenzhou accelerates electrochemical corrosion | Chengli applies dual-layer anti-rust paint plus cathodic electrophoretic coating at its Suizhou factory; salt spray test performance exceeds 800 hours (per CLW5070GSSD6 official type approval parameters) 2 | Sealing Component Durability | No leakage from hydraulic lines, tank flanges, or discharge port gaskets | Focus on rubber seal elasticity—humid, hot conditions accelerate aging; EPDM weather-resistant rubber required (service life >5 years) | Chengli standard-fits fluorocarbon rubber (FKM) seals, operating temperature range: −20°C to 120°C; ozone resistance improved by 60% versus standard nitrile rubber (NBR) 3 | Tank Volume & Material | Rated capacity: 5 m³; measured effective volume ≥4.8 m³ | Frequent rainy-season operations demand corrosion resistance; preference for 304 stainless steel or Q235B steel with internal anti-corrosion lining | Chengli tanks use Q235B carbon steel with interior epoxy resin coating (thickness ≥300 μm), resistant to acids and alkali