Project

Requirement

Longitudinal reversion(110℃)

≤3%    No delamination, cracking and blistering

MFR

                         (5kg, 190℃)/(g/10min)

0.2≤MFR≤1.1

The MFR difference between the raw material particles should not exceed 0.2

Oxidation induction time

(200℃/min)

≥20

Hydrostatic strength test

(80℃,   165h, 4.6Mpa)

No broken, no leakage

Ring stiffness (KN/m3)

Only for the pipes with a “BD”   represents

SR≥4

Combustion toxicity index

≤1