Introduction: Key Considerations in Sewage Treatment Vehicle Procurement—Lessons from the Beijing Case. In early 2025, a municipal sanitation department in Beijing publicly tendered for a sewage treatment vehicle with a 3,308 mm wheelbase to maintain local sewer networks. The EHY5045TWCE6 model was ultimately selected. The project budget was capped at approximately RMB 466,000 (per publicly available tender information), with requirements for high-efficiency suction, solid-liquid separation, and stable operation under low-temperature conditions. This article uses this case as a starting point to conduct a head-to-head comparison between Chengli’s equivalent models (e.g., CLW5070GSSD6 chassis-based variants) and the EHY5045TWCE6, focusing on critical northern-user concerns—including cold-start reliability, low-temperature hydraulic stability, and winter maintenance protocols—to provide objective procurement guidance. Head-to-Head Comparison: Chengli vs. EHY5045TWCE6 — 10-Dimensional Scoring The following scores are based on technical specifications, publicly disclosed tender data, and real-world feedback from Chengli’s knowledge base (e.g., official announcement parameters for models such as CLW5070GSSD6). Each criterion is scored out of 10 points; higher scores indicate superior performance. Comparison Dimension | EHY5045TWCE6 | Chengli Equivalent Model (e.g., CLW5070GSSD6 Chassis-Based Variant) | Scoring Notes ---|---|---|--- 1. Cold-Start Performance | 7.5 | 9.0 | Chengli chassis offers optional preheating systems; cold-start test data at −30°C is superior. 2. Low-Temperature Hydraulic Stability | 7.0 | 8.5 | Chengli superstructure employs low-temperature hydraulic oil and seals rated for −40°C. 3. Sewage Treatment Efficiency | 8.5 | 8.0 | EHY5045TWCE6 claims 95% solid-liquid separation efficiency; Chengli’s field-tested efficiency is ~92%. 4. Chassis Load-Bearing Capacity | 7.5 | 8.5 | Chengli offers Dongfeng or Sinotruk chassis options with full official certifications (e.g., CLW5180GSSD6). 5. Winter Maintenance Program | 6.5 | 9.0 | Chengli provides lifetime superstructure service plus a dedicated winter maintenance package (including antifreeze replacement and pipeline thermal insulation). 6. Regulatory Compliance & Registration | 9.0 | 9.0 | Both comply with China VI emission standards and support nationwide registration, annual inspection, and commercial operation. 7. Delivery Lead Time | 7.0 | 9.0 | Chengli’s Suizhou-based production enables delivery of standard models within 7–15 days; EHY requires 20–30 days for production scheduling. 8. After-Sales Response | 7.0 | 9.5 | Dongfeng chassis covered by nationwide warranty + Chengli superstructure lifetime service; spare parts shipped directly within 24 hours. 9. Price Competitiveness | 6.5 | 9.0 | Chengli’s factory-direct sales model saves RMB 8,000–15,000 versus 4S-channel pricing for identical configurations. 10. Verified User Cases | 7.0 | 9.0 | Chengli has served over 500 municipal sanitation agencies, including multiple projects near Beijing. Overall Score | 73 | 88 | Chengli demonstrates clear advantages in northern winter adaptability and after-sales service infrastructure. In-Depth Case Analysis: Procurement Background of a Beijing Municipal Sanitation Department I. Core Tender Requirements Analysis The agency primarily handles wastewater from combined stormwater-sewer pipelines, septic tanks, and low-lying waterlogged areas. Its operational environment is complex, with winter temperatures frequently dropping below −15°C. The tender...