Technical Informations
Raw materials used in the polyethylene pipe and fitting productions are classified with MRS (Minimum Required Strength) according to mechanic resistance criteria. MRS is the resistance value of material against inner pressure at 20 °C for 50 years. According to MRS, PE materials are classified in the side figure.
Safety co-efficient is determined according to class of raw material and state of the network in the PE pipe networks and all calculations are made according to this co-efficient. The safety co-efficient in the natural gas networks is C=2.0, safety co-efficient in the potable water distribution lines is C=1.25.
Raw Material | MRS (mpa) |
---|---|
PE 40 | 4,0 |
PE 80 | 8,0 |
PE 100 | 10 |
RAW MATERIAL SPECIFICATIONS
Polymer Data | Unit | Test Method | PE 40 | PE 80 | PE 80 | PE 100 |
---|---|---|---|---|---|---|
Colour | Black | yellow | black | Black/blue | ||
Density(23°C) | g / cm³ | ISO 1183 | >0,930 | >0,930 | >0,950 | >0,950 |
MFR (190°C / 5kg) | g / 10 dk | ISO 1183 | - | 0,8-1,3 | 0,4-0,7 | 0,3-0,7 |
Mechanical Properties | ||||||
Elongation At Break | % | ISO 527 | min % 350 | min % 350 | min % 350 | min % 350 |
Elasticity Module | MPa | ISO 527 | >500 | >700 | >700 | >1000 |
Other Properties | ||||||
Oxidization Initial Time | dk | EN 728 | >20 | >20 | >20 | >20 |
Carbon Black Amount | % | ISO 6964 | 2-2.5 | - | 2-2.5 | 2-2.5 |
Carbon Black Distribution | Nominal | ISO 11420 | max 3 | - | max 3 | max 3 |