Chengdu cast iron drain pipe PVC drain pipe manufacturer self-produced and sold

Description :

　　Chengdu cast iron drain pipe PVC drain pipe manufacturer self-produced and self sold bridge drain pipe installation and use instructions:

　　1. The construction of the drainage pipe should be carried out according to the design requirements. The drainage pipe should extend no less than 30mm from the bottom of the structure, and the longitudinal spacing should not exceed 4m.

　　2. For bridges on overpasses, the drainage pipe should not be directly hung under the slab. The drainage pipe can be directly led to the ground through longitudinal and vertical drainage pipes

　　3. Cast iron drain pipe, suitable for paving structures with waterproof layers. The inner diameter of the drainage pipe is generally 0.10-0.15m, and the lower end of the pipe should extend at least 0.15-0.20m below the bottom of the roadway slab to prevent moisture from seeping into the surface of the main beam ribs. Bridge drainage pipes are divided into two types: cast iron and PVC drainage pipes. PVC drainage pipes have low strength and are prone to deformation Very poor weather resistance Short service life High maintenance costs; Gradually replaced by bridge cast iron drainage pipes; The bridge cast iron drainage pipe mainly undertakes the task of rainwater and highway drainage; It is a product that is both environmentally friendly and cost-effective; Widely used for longitudinal and transverse drainage and permeability on highways; Exterior steel pipes formed by adding other additives to high-density steel; Good toughness, able to withstand the impact of strong water flow, not easily damaged; Not easy to rust, long service life; The important thing is that it is not affected by temperature, has a wide range of operating temperatures, good weather resistance, and good dimensional stability when temperature changes; Bridge drainage pipes can be divided into two types based on their external dimensions: circular drainage pipes and rectangular drainage pipes; The commonly used ones are a total height of 420mm, a large mouth inner diameter of 215mm, a small mouth inner diameter of 100mm, and wall thicknesses of 5.5mm.7mm.8mm.10mm The common specifications for rectangles include 125 × mm, 160 × 447mm, 125 × 300mm, 125 × 510mm, 125 × 600mm, 160 × 585mm, etc. Generally, circular shapes can be ordered and shipped on the same day!

　　The price of imported iron ore has been fluctuating around $90 per ton recently, with a decrease of over 60% compared to $233 in May this year. Why has the price of iron ore fallen so sharply while other prices have successively hit new highs? Li Xinchuang, Secretary of the Party Committee and Chief Engineer of the Metallurgical Industry Planning and Research Institute, is analyzing that the main reason is the decreasing demand for iron ore in China. Data shows that from January to October, China's import volume of iron ore decreased by 4.2% year-on-year, and in October alone, it decreased by 14.2% year-on-year.

　　Li Xinchuang revealed, "This year, in terms of the domestic iron ore supply structure, there has been a good trend. In the past, our external dependence was above 80%, but from January to September, our external dependence has dropped to 75%. Although these 5 percentage points are not significant, they should be a good trend. One important thing this year is that we have shifted from simply controlling production capacity in the past to controlling both production capacity and output, resulting in a significant decrease in mineral prices

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