Liaocheng Hongfu Pipe Industry Co., Ltd. introduced the advantages and disadvantages of ductile iron pipes and installation points. The use of ball-and-tube pipes has become more and more widely used. Pipes of any kind have their own advantages and disadvantages. What are the advantages and disadvantages of the tube?
Advantages: In the low and medium pressure pipe network, the ball tube has a safe and reliable operation, low breakage rate, convenient and quick construction and maintenance, and excellent anti-corrosion performance.
Disadvantages: In the high-pressure pipe network, generally do not use, low pressure resistance. Due to the relatively bulky body of the pipe, machinery must be used during installation.
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Construction and installation points
1. Trench excavation bottom width should be calculated as follows: B = D1 + 2 (b1 + b2)
In the formula: B—Excavation width at the bottom of the trench of the pipeline (mm) D1—The width of the outer edge of the pipeline structure (mm) b1—The width of the working surface at one side of the pipeline (mm) b2—The width of the support on one side of the pipeline (mm)
2.2 The groove supports are designed according to factors such as trench soil quality, groundwater, slotted sections, load conditions, etc., and are required to be solid and reliable so as to prevent the collapse and support from interfering with the down tube and the steady pipe.
3. T-junction pipes should be provided with piers for turning in vertical or horizontal direction. The size of the support pier should be determined based on factors such as pipe diameter, corner angle and working pressure.
4. When transporting drinking water, the pipeline should not pass through the toxic contaminated areas, and protective measures should be taken when it must pass through.
5. For socket-connected ductile iron pipelines, piers must be calculated. See the National Building Standard Design Atlas 03SS505, "Flexible Interface Water Supply Pipe Pier".
6. The outer anti-corrosion coating of the ductile iron pipe should be based on the soil conditions of the pipe-laying site, and galvanized and epoxy asphalt coatings or higher required coatings should be selected.
7. After the pipeline is installed and the pressure is qualified, it should be washed with low chloride ion water and disinfected with 0.03% potassium permanganate solution.
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