Quality Control

                            Quality Control
Nashagostar Pardis Company, a manufacturer of pipes and fittings, has a quality control laboratory equipped with advanced laboratory equipment. By conducting detailed tests on its products based on domestic and foreign standards, it has been able to introduce high quality products to the market.

The tests are performed according to the standards - DIN 16961 - ISIRI 9116 - EN 13476.

In this company, the tests are performed as follows:

1- Density (according to ISIRI standard 7175-5)
And the physical properties of polyethylene can be predicted by its density with a good approximation. For this purpose, in this company, this test is performed by floating method on raw materials and products.

2- Melt flow index (ISIRI 6980 standard):
This test is a method for measuring the mass flow rate of molten soft materials under specific temperature conditions and in grams per ten minutes.

3- Long-term ring resistance (according to DIN 16961)
The long-term cyclic strength of the pipe determines the life of a pipe against external pressures.

4- Short-term cyclic resistance (according to ISO 9969 standard)
This test is a method for measuring the annular resistance of pipes.

5- Ring flexibility (according to EN 1446 standard)
When the pipe is pressed, under a certain stress, the deformation created is elastic and returns to its original shape as the stress decreases. In this test, the pipe is pressed to bend by 30% of its diameter. After removing the force, the pipe should return to its original state and no permanent movement or breakage should be observed in the pipe.

6- Measuring the amount of soot (according to ISIRI 7175-2 standard)
The color of the pipe is effective on the long-term stability of the pipe against wind and sun. Soot, which is added to blacken polyethylene, provides very good resistance to ultraviolet light. To be.

7- Soot dispersion (according to ISIRI 7175-6 standard)
Accurate and good distribution of soot in polyethylene is important to achieve the desired functional properties, while the proper distribution of soot is very effective in smoothing the surface of the pipe. In this test, the distribution and distribution of soot is investigated.

8- Thermal return (according to ISIRI 7175-3 standard)
In this method, a certain length of the pipe is heated at a temperature of 110 cc. After the heating stage, the surfaces of the pipe are examined for defects such as cracks, blisters or separation of walls.

9-Dimensional control (according to DIN 16961- ISIRI 9116)
With this control, the inside diameter, the thickness of the inner wall and the height of the production profiles are examined.

10- Welding line tension (according to EN 1979 standard)
By this test, the tensile strength of spiral pipe welding line is measured using a tensile device, and during this test, the spiral pipe must be able to withstand the minimum tensile force required for the welding line.

In this course, water pressure is applied 0.5 times on the pipe for one minute and no sitting should be done in the pipe.a