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With China Plastic Machinery
With China Plastic Machinery
Polyethylene outer casing is a kind of pipe protection device made of high-density polyethylene material.
The wear resistance of polyethylene outer casing ranks among the best in plastics, even higher than some metal materials.
The friction coefficient is small, it is not easy to adhere to other substances, and it has excellent self-lubricating properties.
The impact strength of polyethylene outer casing is in a leading position among plastics, especially in low temperature environment, it can still maintain high toughness and impact resistance.
The material has excellent tolerance to most common chemicals and can resist the influence of various corrosive media in a wide range of temperature and concentration.
The aging life of polyethylene outer casing under natural light conditions can reach 50 years, showing excellent anti-aging performance.
A. High-density polyethylene pipes are prone to aging, so they should be stored away from direct sunlight and covered with rainproof items, and away from high temperatures and open flames. After the insulation pipe is made, it should be avoided from exposure to strong sunlight or rapid cooling to avoid cracking of the pipe, affecting its performance and service life.
B. During transportation and pipe threading operations, it should be handled with care and rough handling should be avoided to prevent damage to the pipe.
C. The thickness of the insulation layer will change with the change of the wall thickness of the pipe, and the specific value should be determined according to the actual situation.
D. The accessories matching the pipe should be complete, including brackets, plastic plugs, flanges, welding rods, welding guns, heat shrink tape, etc.
E. The dimensional error range in the table is in accordance with the CJ/114-2000 industry standard.
The dimensional accuracy of high-density polyethylene outer casing can be calculated by the following formula: when the outer diameter of the pipe is less than or equal to 400 mm, the sum of the upper and lower deviations is 0.1 multiplied by the nominal wall thickness plus 0.2; when the outer diameter of the pipe is greater than 400 mm, the sum of the upper and lower deviations is 0.15 multiplied by the nominal wall thickness plus 0.2.
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