PE pipe is now used in the construction industry and home decoration will be a kind of pipe, with special polyethylene as the raw material by plastic extruder extrusion molding, used in township water supply pipe network, irrigation water diversion projects and agricultural irrigation projects, especially suitable for acid and alkali resistant, corrosion resistant environment of plastic pipe.
And China HDPE parts factory to understand polyethylene plastic
PE tube is polyethylene plastic, the most basic kind of plastic, plastic bags, plastic wrap and so on are PE, HDPE is a high degree of crystallinity, non-polar thermoplastic resin. The appearance of the original HDPE is milky white, a certain degree of translucency in thin section.
PE has excellent resistance to most domestic and industrial chemicals.
Understand the PE water supply pipe
PE pipe for water supply is the replacement product of traditional steel pipe and PVC drinking water pipe.
The water pipe must bear a certain pressure, normally choose high molecular weight, excellent mechanical properties of PE resin, such as HDPE resin. LDPE resin has low tensile strength, poor pressure resistance, poor rigidity, poor dimensional stability when forming, and difficult connection, it is not suitable as the material of water supply pressure pipe. However, LDPE, especially LLDPE resin, has become a commonly used material in the production of drinking water pipes due to its elevated health index. LDPE and LLDPE resins have modest melting viscosity, excellent fluidity and easy processing, so the selection range of their melt index is wide, normally between 0.3-3g/10min MI.
The influence of outdoor environment on PE water supply pipe
During the construction of PE water supply pipe in winter, when the connection operation is carried out in cold climate (below -5℃) and strong wind environment, attention should be paid to take protective measures or adjust the construction. Due to the excellent impact resistance of PE material, pipe cracking will not occur in general. However, when the ambient temperature is low to a certain extent and the temperature difference between the construction environment and the pipe stacking place is large, it will be easy to damage the brittle cracking. If the temperature difference between the storage place of PE pipe fittings and the construction site is large, place the pipe and fittings at the construction site for a period of time before connection so that the temperature is close to that of the construction site.
Influence of ambient temperature and water temperature on longitudinal deformation of pipeline
PE pipe has strong temperature resistance, excellent impact resistance at low temperature, low temperature embrittlement temperature of polyethylene is extremely low, and the service life of -20℃-70℃ under normal conditions can reach 50 years. Runsuo pipe PE pipe manufacturers should have complete PE pipe production equipment, excellent processing technology system, excellent testing equipment and strict quality inspection to ensure the quality of PE pipe.
Longitudinal deformation:
The harm of longitudinal deformation is mainly manifested in the leakage phenomenon caused by the pipeline, which leads to the collapse and deformation of the pavement, which has become the main cause of urban road diseases. Among them, the leakage accident that occurred at the joint of polyethylene pipe and metal pipe is the most prominent.
Because the longitudinal shrinkage of PE pipe is considerably affected by the ambient temperature and the water temperature in the pipe, pipeline leakage accidents caused by this may occur from time to time. Therefore, it is suggested to overcome these accidents in the following ways:
(1) Using "snake" to overcome the longitudinal deformation force, suitable snake laying pipe (only need to increase the length of 4.5/1000), so that the polyethylene pipe can consume the longitudinal stress through a certain deformation;
(2) Use socket and plug interface to overcome longitudinal shape variables;
(3) Support piers are used to overcome stress by fixing and anchoring, and support piers are set at tees, elbows, valves, pipe blocks and pipe interfaces of pipes of different materials in the pipeline system to anchor free pipe sections.