MDPE for Pipes and Fittings of Gas Distribution Systems |
PE80B-275, |
Production method: gas-phase ethylene copolymerization at low pressure using the modified complex catalysts.
Application: compositions are intended for pipes and fittings production of gas distribution systems as well as pressure pipes and fittings for domestic potable cold water supply systems.
No. |
Parameter |
Standard |
1 |
Density, g/cm3 |
0.945-0.953 |
2 |
Melt Flow Index at 190 °C, g/10 min.: |
0.35-0.70 |
3 |
MFI spread within one batch, %, maximum |
±10 |
4 |
Tensile yield strength, MPa, minimum |
17 |
5 |
Elongation at break, %, minimum |
700 |
6 |
Carbon black weight content, % |
2.0-2.5 |
7 |
Type of carbon black distribution |
I-II |
8 |
Thermal stabilizer weight content, %, minimum |
0.27 |
9 |
Thermal stability at 200 °C, min., minimum |
20 |
10 |
Volatile weight content, mg/kg, maximum |
350 |
11 |
Slow propagation crack resistance at 80oC, with initial wall stress 4 MPa, hrs, minimum |
165 |
12 |
Odor and taste of water extracts, in points, maximum |
1 |
13 |
Gas component resistance at 80oC, with initial wall stress 2 MPa, hrs, minimum |
20 |
14 |
Quick propagation crack resistance at 0oC, at maximum operating pressure exceeding 0.4 MPa |
|
14.1 |
Small-scale method on pipe samples d110 mm, critical pressure pc, MPa, minimum |
МОР/2.4-0.072 |
14.2 |
Full-scale method on pipe samples d160 mm, critical pressure pc, MPa, minimum |
МОРх1.5 |
Packaging, handling and storage are in PE and PP bags that provide product preservation and maintain its quality as per documents approved under the appropriate procedure. Transportation by combined roofed transport in accordance with the rules of carriage valid for this mode of transport.
index file generated on: Fri Oct 12 10:51:31 CEST 2012