Glass fiber reinforced polypropylene (FRPP) pipe |
| Publisher:Jiangsu LvDao Pipe Valve Co.,Ltd Release time:2020-10-15 10:30:01 Hits:598 Close |
| Product features 1) Long service life, FRPP pipe can be safely used for more than 50 years. 2) Excellent corrosion resistance. 3) Excellent wear resistance. 4) High stiffness. 5) Heat insulation and energy saving. 6) Reliable connection performance. 7) Good construction performance: the material of FRPP pipe is light, the welding process is simple, the construction is convenient, and the project comprehensive cost is low. Product classification 1) Classification by pipe diameter Reinforced polypropylene (FRPP) pipes are commonly used in 12 specifications. 2) Welding wire is used for welding connection. 3) The water temperature suitable for discharging into the pipeline shall not be greater than 40 ℃. Main application occasions Building large area drainage works. [1] Main application: Drainage Engineering in large building area. Key points of construction and installation 1) The pipeline shall be laid on the undisturbed soil foundation or the foundation backfilled with trench treatment. 2) The net width of groove bottom can be determined according to the pipe diameter, soil conditions, buried depth and construction technology. 3) When excavating the trench, the base elevation shall be strictly controlled and the base surface shall not be disturbed. economic analysis Due to the improvement of strength, the construction is convenient and the construction cost is reduced. Executive Standards 1) Product standards Technical specification for buried polyethylene drainage pipeline engineering CECS 164:2004 2) Engineering standards Code for design of building foundation (GB 50007-2002) 3) Relevant standard drawings "Construction of buried plastic drainage pipeline" 04s520 matters needing attention Matters needing attention in punching and cutting of FRPP pipe FRPP pipe is glass fiber reinforced polypropylene pipe, which is mainly used to transport acid-base liquid or gas. It is high-temperature resistant and widely used in chemical, smelting, medical and other fields. Punching cutting refers to the use of die to cut off the pipe on the press, which is the abbreviation of stamping part cutting. It is suitable for thin-walled pipe (d-tube outer diameter, T-pipe wall thickness) with relative thickness T / d < 0.1, such as FRPP pipe. Then the matters needing attention in the punching process of FRPP pipe are as follows: 1. In order to reduce the flattening phenomenon of FRPP pipe, the concave die is usually made into a little peach shape, so that the pipe can produce a certain amount of reverse deformation under the strong clamping of the left and right half die before punching (making the upper part of the pipe wall protrude), and then the pipe is cut by the cutter, which can reduce the defect of the pipe flattened by the cutter. 2. When the sliding block of the press goes down, the blade tip of the cutter contacts with the pipe wall, causing elastic deformation of the pipe wall. When the pressure reaches a certain value, the material at the contact between the blade tip and the pipe wall will deform plastically, and the blade tip will press into the material. With the increase of the pressing degree of the edge tip, the stress and strain of the FRPP pipe are highly concentrated, which leads to the instantaneous brittle fracture of the material and the edge point enters into the tube cavity. Then the cutter side edge and die side start to shear the pipe wall until the pipe is completely cut off. 3. At the beginning of pipe cutting, the chip is formed inward. Therefore, the process should be shortened as far as possible. Therefore, the cutter curve must be made thin and long, but the strength is poor and easy to break. If the shape of the blade is wide and short, the strength of the cutter is good, but the chip is easy to form inward, which makes the flattening phenomenon serious. It is not conducive to the punching process. Therefore, the cutter curve shape and size should be determined reasonably. It is the key to the success or failure of punching method. |
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