Government Procurement Case and Bid-winning Solution Analysis for the Urumqi EHY5045TWCE6 Sewage Treatment Vehicle (3308 mm Wheelbase). As a representative city in Northwest China’s cold region, Urumqi experiences extreme winter temperatures below -30°C. For municipal sewage treatment equipment, cold-weather starting performance, hydraulic system stability, and maintenance costs are the procurement authority’s top priorities. This article focuses on Chengli Special Purpose Vehicle’s EHY5045TWCE6 sewage treatment vehicle (3308 mm wheelbase), analyzing selection logic and tailored solutions across three typical operational scenarios—light-duty municipal, heavy-duty industrial, and special operations—to provide actionable reference for Urumqi and similar cold-region procurement entities. I. Operational Condition Analysis and Selection Logic Based on tender requirements from a municipal sanitation department in Urumqi (referencing publicly available tender information), the authority plans to procure a batch of sewage treatment vehicles for urban sewer network desilting, emergency pumping/drainage, and industrial wastewater treatment. Considering local climatic conditions, we have identified three typical operational scenarios and their corresponding recommended specifications: Operational Scenario | Application Context | Recommended Configuration Parameters | Chengli’s Tailored Solution ---|---|---|--- Light-Duty Municipal | Street sewer manholes, residential septic tanks, small-pipe cleaning | Wheelbase: 3308 mm; tank capacity: 3–4 m³; suction pump flow rate ≥ 80 m³/h; China VI emission standard | EHY5045TWCE6; chassis options: Dongfeng or Foton; standard configuration includes antifreeze liquid heating system Heavy-Duty Industrial | Industrial park wastewater ponds, large-diameter sewer networks, emergency response | Wheelbase: 3308 mm; tank capacity: 5–6 m³; suction pump flow rate ≥ 120 m³/h; low-temperature-resistant hydraulic system | Upgraded version: electric heating devices installed on hydraulic oil lines; tank insulation layer thickened to 50 mm Special Operations | Winter emergency pumping/drainage, continuous operation under extreme cold | Full low-temperature package (-35°C starting capability), low-temperature-resistant hydraulic seals, intelligent temperature control system | Standard across entire series: engine preheating, hydraulic oil circulation heating, pipe trace heating tapes Key Notes: Under Urumqi’s winter low-temperature conditions, conventional sewage treatment vehicles often suffer from hydraulic oil solidification and difficult engine starts. The Chengli EHY5045TWCE6 model is factory-equipped with a low-temperature starting module specifically designed for cold regions, including: - Cold-Weather Starting: Battery thermal cover and engine preheater ensure single-start capability at temperatures above -25°C. - Low-Temperature Hydraulic Stability: Low-temperature hydraulic oil (-35°C rated) is used; electric trace heating tapes are installed on hydraulic lines to prevent oil line freezing. - Winter Maintenance Program: A dedicated winter maintenance manual is included with each vehicle, covering antifreeze replacement intervals, hydraulic system insulation measures, and battery maintenance guidelines. II. Urumqi Case Study: EHY5045TWCE6 Bid-Winning Solution In winter 2025, a district Urban Management Bureau in Urumqi procured five sewage treatment vehicles via public tender for emergency desilting of urban sewer networks. The tender documents explicitly required: vehicles capable of reliable starting at -25°C, stable hydraulic system operation under low temperatures, and provision of localized after-sales service. Chengli Special Purpose Vehicle secured the contract with its EHY5045TWCE6 model. The delivery solution is as follows: 1. Core Vehicle Specifications