2. The manufacturers are Fiona Fang Cement Products Factory in Feixi County and Yongxing Cement Factory in Feixi County. According to the itinerary, the reinforced concrete pipes and concrete modules of Fiona Fang Cement Products Factory in Feixi County were first inspected at the site. The factory is located in Guogang Community, Huagang Town, Feixi County, and the diameter of reinforced concrete pipes produced is φ300-φ2400. Through the inspection of factory qualification, test report, on-site construction equipment, production scale and on-site finished products, the appearance quality of reinforced concrete pipes in this factory is relatively stable, steam curing measures are adopted, the strength of pipes is guaranteed, and all factories conduct self-inspection.
3. The concrete modules produced by this manufacturer have the same appearance color, the maintenance measures are artificial watering, and the production area, maintenance area and storage area are clearly marked. However, through the inspection of the concrete module in the storage area, it is found that there are some missing edges and corners, which shows that the maintenance measures and early strength of the concrete module of this manufacturer need to be strengthened. After inspecting Fiona Fang Cement Products Factory in Feixi County, we also inspected Yongxing Cement Products Factory in Feixi County. The factory is located in Ye Gang Village, Huagang Town, Feixi County. It mainly produces concrete modules, covering an area of about 36 mu, with a large daily output and inventory, a professional module curing steam room and good appearance quality. The concrete modules in the storage area have been inspected, and there is no corner phenomenon.
4. The quality and strength can meet the requirements. According to the actual situation of field investigation, combined with the construction unit's choice of material manufacturers.