Directly Buried Prefabricated Bend

Standard:CJ/T155-2001
Size:219.1×8.7×12000mm
Jacketed Pipe Performance Indicators:
Density:≥940 kg/m3    Carbon Black::2.5%±0.5%.
Melt Flow Rate Difference:≤0.5g/10min
Tensile Yield Strength:≥19 MPa
Elongation at break≥350%
Longitudinal Shrinkage Rate:≤3%
Tensile strength (80℃,the shortest Yield time 1500h):≥4MPa
Technical Indicator of Insulation Layer:
The Foam Obturator Rate≥88%
Foam Density :≥60 kg/m3.
Comprehensive stress:≥0.3MPa
Water Absorption:≤10%
Technical Indicator of Insulation Pipe:
Jacketed Pipe Diameter Enlargement Rate:≤2%
Allowed Center Line Tolerance :≤10mm
Angle Tolerance ≤2°
Shearing Strength:23±2℃≥0.12 MPa
                140±2℃≥0.08MPa
Cutting Impact :External protecting tube without visible cracks