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What are the qualıty tests performed on Hdpe pıpes?

Hdpe, There are standards that are determined from the beginning to the end of Hdpe pipe production and which must be applied. And these tests are applied. PE 100 pipes can only be shipped and transported after these tests.

The quality tests performed on HDPE pipes typically include:

  1. Hydrostatic Pressure Test: This test is performed to check the resistance of the pipes to the internal pressure. The pipes are filled with water and the pressure is gradually increased to check for any leaks or ruptures.

  2. Impact Test: This test is performed to check the impact resistance of the pipes. The pipes are subjected to a heavy weight, and the amount of damage sustained is recorded to evaluate the impact resistance.

  3. Slow Crack Growth Test: This test is performed to check the long-term stability and crack resistance of the pipes. The pipes are subjected to a constant stress over a period of time, and the rate of crack growth is monitored to evaluate the slow crack growth behavior of the pipes.

  4. Tensile Strength Test: This test is performed to check the strength of the pipes under tension. The pipes are subjected to a tensile force, and the amount of force required to break the pipes is recorded to evaluate the tensile strength of the pipes.

  5. Aging Test: This test is performed to check the effect of aging on the pipes. The pipes are exposed to various environmental conditions such as heat, sunlight, and moisture over a period of time, and the change in properties such as flexibility, strength, and resistance to cracking is monitored.

  6. Chemical Resistance Test: This test is performed to check the resistance of the pipes to various chemicals. The pipes are subjected to various chemicals, and the effect of the chemicals on the pipes is recorded to evaluate the chemical resistance of the pipes.

  7. Bend Test: This test is performed to check the flexibility of the pipes. The pipes are bent to a certain radius, and the amount of force required to bend the pipes is recorded to evaluate the flexibility of the pipes.

These tests are usually performed by independent testing organizations and the results are used by the manufacturers to determine the quality and performance of the HDPE pipes. The results of these tests also help the manufacturers to identify areas for improvement and make necessary modifications to the manufacturing process.

OUALITY TEST HDPE PIPES

  • Thermal Stability (DETERMINATION OF OXIDATION INDUCTION TIME) Test It is the time that the antioxidant additive in the PE material prevents oxidation at high temperature.
  • Carbon Black Amount Analysis (ISO 6964) It is made by determining the amount of carbon (%) added in order to make the Hdpe pipes resistant to UV rays.
  • Density Test (ISO 1183) It is made with the aim of calculating the weight of the Hdpe pipe per unit volume. The sample is weighed first in air and then in a liquid whose density is known beforehand. Density is also found with the calculation specified in the standard.
  • MFR (Melt Flow Rate) Test (ISO 1133) It is an application made to test the behavior of the material to be used against temperature before it is processed. The values ​​found as a result of the test with the MFI device were loaded into the device and calculated gr/10 min. The result is determined with the unit.
  • Tensile Strength (ISO 527) Thermoplastic and profile pipes flow or max. It includes the determination of tensile stress and elongation at break at load. The test for tensile properties is carried out to determine the properties used in manufacturing and is valid for all thermoplastic pipes.
  • Hydrostatic Pressure Test (ISO 9080 EN 921) It is the test in which PE 100 pipes are examined in abbreviated ambient conditions in order to test their behavior against pressure over time. The changes of Pe 100 pipes over a period of 50 years are observed with this test.
  • Homogeneity Test (ISO 13949) It is done with the aim of examining the homogeneous pigment distribution and possible gaps in the structure of the material. The microtome section taken at a thickness of 10-15 µm is examined under the microscope.