Installation and use instructions for the drainage pipe manufacturer of Heyuan Bridge

Description :

　　Installation and usage instructions for drainage pipes:

　　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.

　　The use of flat mouth connection for drainage pipes requires high quality of pipe materials, including high requirements for the outer diameter ovality, wall thickness, and physical properties of rubber rings of drainage cast iron pipes. Due to the poor water tightness conditions of flat mouth, in addition to strictly controlling the quality of the pipe and fittings, special attention should be paid to the protection of the pipe and fittings to ensure the ovality and flatness of the ports. Again: Installation and construction should be strictly carried out according to the operating procedures. Especially during the installation of straight pipes, each pipe interface needs to be fixed to the load-bearing wall of the building with a riser clamp.

　　Its safety and practicality have been widely recognized in the water supply industry. In 2008, the annual production in China reached 2.2 million tons, which is 11 times that of 1990. Due to the scarcity of water resources in our country, with over 600 water scarce cities and more than 200 severely water deficient cities, the water supply and water-saving industry is thriving, and ductile iron pipes have broad development prospects.

　　Many defects in square tubes are caused during perforation, so the perforation process of the tube blank is a key procedure for producing square tubes. The main difficulty in perforation of high alloy lies in its low perforation performance. In order to ensure quality, it is necessary to rationally choose the deformation parameters for perforation. A small compression amount can cause instability in the perforation process, so when the critical compression amount is small, the top should be set at around 7% of the previous compression amount, otherwise it will not bite, and may even move or get stuck in the front. The increase in compression in front of the top will also form a cavity and cause defects inside the muffled sound. So if you want to overcome the problem, the pipe blank also needs to be centered, and the depth of the centering space should be compared with other steel grades.

　　Hot rolled rectangular tubes, continuous casting billets, and initial rolled plates are used as raw materials, and then passed through a heating furnace, even when working with high-pressure water and surface phosphorus. Then, a roughing mill is used to cut the rectangular tubes at the head and tail of the roughing mill, which are then fed into the pipeline and then into the precision rolling machine controlled by the computer. After laminar cooling, the square tube is rolled and coiled by a coiler. However, when re curled, thickness often occurs, as well as accuracy as some kind of error. This is no different from the tendency for defects to appear on the edges. So curl it again, trim it with straightening treatment and then cut the head to ensure the thickness and accuracy of the rectangular tube.

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• Heyuan Bridge Drain Pipe