PP pipes should be stacked horizontally on a flat ground. Bending pipes should be avoided. The stacking height should not exceed 1.5m. Pipe fittings should be stacked layer by layer and should not be stacked too high. PP pipes and fittings shall be placed in well-ventilated warehouses or simple sheds, and shall not be stored in the open air to prevent direct sunlight. Pay attention to fire safety and the distance from heat source shall not be less than 1m. Pipes and fittings shall be handled with care to avoid oil pollution. Violent impact is strictly prohibited. It is strictly prohibited to touch, throw, drop, roll and drag with sharp objects.

PP double-wall reinforced corrugated pipe is a kind of advanced formula, polypropylene resin as the main raw material, adding appropriate amount of glass fiber and modified additives, continuous extrusion molding with a unique molding process device, the inner wall is smooth, high strength, the outer wall adopts I-steel principle with vertical reinforcement of the new pipe. PP pipe is suitable for soft soil areas and is widely used in municipal engineering rainwater and sewage discharge. Industrial wastewater discharge, district drainage project; Salt industry halogen, fishery water delivery; Mine ventilation, drainage engineering; Agriculture, forestry irrigation and drainage, water conservancy projects, etc. PP pipe material is new, the product structure is reasonable, the strength is high, corrosion resistance; the inner wall is smooth, the circulation is large, the same flow diameter is small, not easy to scale; light weight, convenient handling and installation, the exhaust pipe does not need to be made of concrete foundation, and the construction is fast. PP pipe flare socket connection "T-shaped" rubber ring seal, so that the leakage of the pipe is low, and the flare length is long, it is not easy to fall off during construction, thus ensuring the engineering quality. Injection molding uses the thermophysical properties of thermoplastic and the reversible properties of melting by heating, cooling and solidification to add materials (usually pellets) into the barrel with heating and screw inside through a hopper, the material is transported and compacted along the screw groove under the action of the screw rotation. At the same time, under the action of the shear force of the screw and the external heat conduction, the plasticization becomes a uniform melt, which gathers at the screw head to complete the plasticization stage. Under the high pressure and high speed pushing of the screw, the melt is injected into the mold cavity with cooling facilities from the nozzle through the runner. After a certain pressure is maintained, the injection stage is completed, and after the cooling and shaping stage, the mold can be opened to top the product. Injection molding is the main method of forming PP pipe fittings. Moldable PP pipe fittings or components of pipe fittings include hot melt pipe fittings (butt, socket, saddle) or long socket pipe fittings elbow, equal tee, reducing tee, reducing, flange end, end cap, saddle pipe fittings. Elbow, equal tee, reducing tee, reducing diameter, end cap, flanged end, plastic parts of plastic compression pipe fittings, electrofusion pipe fittings, valve fittings, pipe clamps. There are many classification methods of injection molding machine, such as according to the type of clamping mechanism, can be divided into hydraulic, hydraulic mechanical and electromechanical. The injection molding machine is mainly composed of injection parts, clamping parts, hydraulic system, body, heating and cooling system, electrical control system and feeding device. The part directly related to the injection quality and process of PP pipe fittings is the plasticizing device in the injection molding part.