MDPE for Pipes and Fittings of Gas Distribution Systems

PE80B-275,
PE80B-286 Grades
TU 2243-046-00203521-2004,
rev. 1

 

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
for PE80B-275, PE80B-286

1

Density, g/cm3 
at 20 °C
at 23 °C

 

0.945-0.953
0.943-0.951

2

Melt Flow Index at 190 °C, g/10 min.:
a) at 49 N (5 kgf) load
b) at 212 N (21.6 kgf) load

 

0.35-0.70
6.5-16.0

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.


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index file generated on: Fri Oct 12 10:51:31 CEST 2012