Characteristics | Unit | Requirement | Test parameter | Test method |
Density | kg/m3 | ≥ 930 | 23ºC | ISO 1183 |
Melt flow rate | g/10 min | ±20% of the nominated value or ±0.1 g/10 min, whichever is the greatest | condition T | IS 1133 |
Thermal stability | min | > 20 | 200ºC | ISO 11357-6 |
volatile content | mg/kg | ≤ 350 | EN 12099 | |
Water content | mg/kg | ≤ 300 | ISO 15512 | |
Carbon black content | %(mass fraction) | 2.0% to 2.5% | ISO 6964 | |
Carbon black or pigment dispersion | Grade | ≤3 | ISO 18553 | |
Rating of appearance | A1, A2, A3 or B | |||
Carbon black particle size | nm | 10 to 25 | ASTM D 3849 | |
Characteristics of PE compound — Tested in pipe form | ||||
Characteristics | Unit | Requirement | Test parameter | Test method |
Resistance to gas constituents | h | ≥20 | 80 °C 2 MPa | Annex A |
Resistance to rapid crack propagation (RCP): S4 test (e W 15 mm) | bar | pc ≥ 1,5 × MOP with pc = 3,6 × pcS4 + 2,6 (in bar) | 0 °C | ISO 13477 |
Resistance to slow crack growth | h | ≥500 | 80 °C; 8,0 bar 80 °C; 9,2 bar | ISO 13479 |
Resistance to weathering (for non-black compounds only) | After weathering | E ≥ 3,5 GJ/m2 | ISO 16871 | |
Hydrostatic strength of pipe | 80 °C; ≥1 000 h | ISO 1167-1 ISO 1167-2 | ||
Elongation at break of pipe | ≥350 % | ISO 6259-1 ISO 6259-3 | ||
De-cohesion of an electrofusion joint — percentage brittle failure | 23 °C; ≤ 33,3 % | ISO 13954 ISO 11413 Jointing condition 1 ISO 8085-3 | ||
Characteristics | Unit | Requirement | Test parameter | Test method |
Hydrostatic strength | h | Failure time ≥ 100 h | 20 °C PE 80; 9,0 MPa PE 100; 12,4 Mpa | ISO 1167-1 ISO 1167-2 |
Failure time ≥ 165 h | 80ºC PE 80; 4,5 MPa PE 100; 5,4 MPa | |||
Failure time ≥ 1 000 h | PE 80; 4,0 MPa PE 100; 5,0 Mpa | |||
Elongation at break | % | ≥ 350 | ISO 6259-1 ISO 6259-3 | |
Resistance to rapid crack propagation (RCP) | bar | pc ≥ 1,5 × MOP with pc = 3,6 × pc,S4 + 2,6 (in bar) | 0°C | ISO 13477 |
Resistance to slow crack growth: Cone test (en ≤ 5 mm) | mm/day | < 10 | 80°C | ISO 13480 |
Resistance to slow crack growth : Notch test (en > 5 mm) | h | ≥ 500 | 80°C | ISO 13479 |
Physical characteristics of the pipes | ||||
Thermal stability | min | > 20 | 200 °C | ISO 11357-6 |
Melt flow rate | g/10 min | Change in MFR by processing < 20 % | 190°C | ISO 1133 |
Heat reversion | % | ≤ 3, no effect on surface | 110°C | ISO 2505 |
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