Main Indexs of Pre-insulated Pipe | ||||||||
Product Name | Product Indexes | Reference Standard | Unit | Standard Requirement | ||||
HDPE protection pipe | Density | CJ/T114-4.2.3.1 | kg/m3 | ≥940 | ||||
Elongation at break | CJ/T114-4.2.3.4 | % | ≥350 | |||||
Tensile yield stength | CJ/T114-4.2.3.4 | MPa | ≥19 | |||||
Longitudinal shrinkage rate | CJ/T114-4.2.3.5 | % | ≤3 | |||||
Long term Mechanical properties | CJ/T114-4.2.3.6 | 80℃ 4.0MPa | >1500h free from damage | |||||
The difference of the melt flow rate | CJ/T114-4.2.3.2 | g/10min | ≤0.5 | |||||
Carbon Black content | CJ/T114-4.2.3.1 | % | 2.5±0.5 |