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Accredited Experiments

DENSITY DETERMINATION (TS EN ISO 1183-1)

Density is the ratio of mass to volume of a material at a given temperature. It can be expressed in different units such as g/cm³, kg/cm³, g/ml, kg/l. Density is generally used to monitor changes in the physical structure or composition of materials. TS EN ISO 1183-1 standard defines three different methods for determining density. Method A: Immersion Method, Method B : Pycnometer Method, Method C: Titration Method. In our laboratory, Method A Method is used. The results are given in g/cm³.

MELT FLOW RATE (MFR) DETERMINATION (TS EN ISO 1133-1)

The MFR value is the amount in grams of molten material flowing from the mould of a certain length and diameter under a certain temperature and load within 10 minutes. MFR value is important for determining the processing and welding parameters of the material. TS EN ISO 1133-1 Standard defines two different methods for melt flow rate. Method A: Mass Flow Rate

( MFR ) and Method B: Volumetric Flow Rate (MVR). Method A is used in our laboratory. Results are given in g/10 min.

OXIDATION INDUCTION Sn (OIT) (TS EN ISO 11357-6)

Plastic materials such as PE and PP lose their mechanical properties when exposed to oxygen and high temperatures. In order to protect plastic materials from this condition known as oxidation, it is necessary to use raw materials containing antioxidants during manufacturing to ensure thermal stability. The thermal stability of plastic materials is known as ‘Oxidation Induction Time (OIT)’. It is a measure of how thermally stable the material is. It is expressed in minutes. In TS EN ISO 12201-1 standard, the material is not required to deteriorate before 200 minutes at 20 °C. Materials with OIT values shorter than 20 minutes begin to deteriorate at high temperatures during processing or welding. As a result, the service life of the product is shortened.

CARBON BLACK QUANTITY DETERMINATION (TS ISO 6964)

Exposure to ultraviolet light accelerates the physical and chemical degradation of many types of plastics. Absorbed UV light breaks the weak chemical bonds or molecular chains of the polymer material. This leads to shorter chains, which causes the plastic material to become more brittle and its mechanical properties to decrease. In order to prevent this, raw materials containing 2 to 2.5% carbon black should be used during manufacturing. The carbon black in the product prevents the deterioration of the structure of the plastic by retaining UV rays from the sun. The amount of carbon black is an important parameter for the service life of black pipes and fittings.

GRADING OF SEGMENT OR CARBON BLACK DISTRIBUTION (TS ISO 18553)

The distribution of carbon black is as important as its quantity. Carbon black without homogenous distribution will not show the desired performance in UV protection. In addition, both carbon black and other colour pigments used for colouring without homogeneous distribution will cause a decrease in the mechanical properties of the product. In this experiment, the carbon black or pigment particle sizes distributed in the sample are measured under a microscope with 100 times magnification and the degree of dispersion is determined according to the standard. The standard requires the degree of dispersion to be ≤3.

DETERMINATION OF TENSILE PROPERTIES (TS EN ISO 6259-1/3)

The ratio of the length change at the moment of rupture to the first measured length after the test specimen is pulled until it breaks in one axis at a constant speed varying according to the thickness of the specimen gives the % elongation. As a result of this test, tensile strength and yield strength are also determined. A measuring instrument called extensometer is used to determine the length change. By means of specially developed programmes for tensile devices, information on mechanical properties such as stress, yield and elongation are obtained during the tensile drawing of the test specimen.

DETERMINATION OF VOLATILE MATTER CONTENT (TS EN 12099)

Polyethylene (PE) pipe materials are tested. This test method can also be applied to moulding and extrusion materials and elements used in polyethylene pipe systems. The aim is to determine the mass loss after the volatile substances in the test material kept in an oven at 105 °C are removed under the influence of temperature. The loss gives the volatile matter content. According to TS EN ISO 12201 – 1 Standard, the volatile matter content is required to be ≤ 350 in mg / kg at most.

DETERMINATION OF DIMENSIONS (TS EN ISO 3126)

This method aims to measure and evaluate the geometrical properties of plastic pipes and fittings. The evaluation process is carried out according to the relevant standards or specifications.

DETERMINATION OF CHANGE IN LENGTH (TS EN ISO 2505)

It is a test method to determine the ability of thermoplastic pipes to take their former state in length when exposed to temperature changes. It is applied to pipes with a wall thickness of 16 mm and below.

DETERMINATION OF INTERNAL PRESSURE RESISTANCE (TS EN ISO 1167-1/2)

The internal pressure resistance test is an indication of the ability of pipes and fittings to provide the prescribed period of use. Pipes, fittings, or product trees consisting of their mixture should not burst or puncture during the test period when exposed to an internal pressure suitable for the pressure class at the time and temperature required in the standard or specifications.