Quality Control Lab
Multiple tests of materials and PE pipe
Raw material tests
The permissible value in INSO 14427 is reported between 0.15 to 0.7 g / 10 min and does not distinguish between PE100 and PE80, but this is an optimum time for PE100 to range from 0.15 to 0.23. Be it.
Polyethylene tube tests
In accordance with INSO14427 standard in multilayer pipes, MFR test is to be performed on each layer separately and the results are recorded for each layer.
Tubes up to 5 mm thick are called Type 2, samples greater than 5 mm thick are Type 1 and specimens more than 12 mm thick are called Type 3.
After placing the specimens in the two jaws of the pulling device, the specimens are drawn at a certain speed. In accordance with INSO 14427, the amount of elongation prior to rupture of the specimen shall be greater than 350%.
Polyethylene pipes in accordance with National Standard 12121-1 must withstand a certain pressure over a specified time and temperature.
The test is either carried out at 100 ° C at 20 ° C or 165 ° C at 80 ° C or 1000 ° C at 20 ° C and the pressure applied according to the following formula is calculated for each specified tube.
In accordance with ISO 2505 the pipe shall pass the longitudinal return test. A 20cm long tube is selected and its 10cm mark is marked with equal distance from the two ends of the tube. The tube is placed in the oven at 110 degrees Celsius, and after 1 to 2 hours (depending on the thickness of the tube), it is removed and allowed to cool. After cooling the pipe, the length change should not be more than 3%.
In accordance with INSO 14427 standard, on tubes with coextruded layers, structural integrity testing shall be performed after bending ISO 13968.