20 # steel corrosion 3pe Han, there was a man named Sun Jing, a famous politician. His studious young man, often behind closed doors, alone kept reading. Reading every day from morning to night, often sleepless nights. Reading a long time, tired, and not the rest. Over time, tired enough to fall asleep straight. He might affect their reading and learning, they came up with a special way. In ancient times, men's hair is very long. He would find a rope, tied one end firmly in the beam. When he dozed off while reading fatigue, head and one low, it will just hold the rope of hair, so that will pull the scalp pain, immediately wake up, then continue reading to learn. Common non-pressure pipe straight arched wall, constructed of concrete or Masonry; there is more pressure pipe circular reinforced concrete pipe. Imported elevation determined according to application requirements. Except for the water to generate electricity pipe, pressure pipe after pipe joint, the other uses the pipe under the dam outlet energy dissipation required to set up facilities. Pipe cross-sectional dimensions of the flow depends on the application requirements and forms: there is pressure on the pipe, according to the design flow and the downstream water level, according to the pipe flow calculations, and to ensure that there is a certain pressure over the roof pieces; for non-pressure pipe, according to the water inlet pressure before and after the paragraph, press the orifice flow calculation flow capacity, inside the water line is calculated by the constant non-uniform open channel flow equations. Wall thickness by embedding way (ditch buried on buried or corridor style), calculated and determined with reference to similar projects. To prevent temperature changes and lead to uneven settlement of foundation tube body breaks or cracks between the tube and the body to produce concentrated seepage and dam design requirements: ① tube body should be placed on good ground, and in the tube body and Set between the concrete foundation or pad Masonry; ② should not be buried on top of the dam embankment; ③ every 10 ~ 20m along the lines set expansion joints, sealing cracks located; ④ clay core wall or sloping wall and other impervious structures and pipeline junction To properly thickened, tube filling 1 ~ 2m thick impermeable soil material; ⑤ 10 ~ 20m set on the outside of the pipe every ring closure to increase seepage path along the pipe surface to prevent produce concentrated seepage. BE> 100um), the second layer of adhesive (AD) 170 ~ 250um, a third layer of polyethylene (PE) 2.5 ~ 3.7mm. Three materials blend to form a solid combination with steel excellent corrosion layer. Q: Why do come Pipe Co., Ltd. Cangzhou Guanghui anticorrosive steel? A: The money Q: Why money? A: The bride asked: Why marry a wife? A: raw baby Q: Why born baby? A: Cangzhou Guanghui grow further to do anti-corrosion steel pipe Limited.