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Product Name: high density polyurethane foam insulation pipe
Specifications: 406.4 x 9.5 x 12000mm
Performance index of external protection pipe:
Density: not less than 940 kg/m3. Carbon black: 2.5% + 0.5%.
The difference of melt flow rate: less than 0.5g/10min
Tensile yield strength: greater than or equal to 19 MPa
Elongation at break: greater than or equal to 350%
Longitudinal retraction rate: less than 3%
Tensile force (80 C, minimum yield time 1500h): greater than 4MPa
Insulation layer technical indicators:
The obturator rate of foam is more than 88%.
Foam density: greater than or equal to 60 kg/m3.
Compressive stress: greater than or equal to 0.3MPa
Water absorption: less than 10%
Insulation pipe technical indicators:
External diameter increase rate: less than 2%
Axis eccentricity: less than 6.0mm
Shear strength: 23 + 2 centigrade, greater than 0.12 MPa
140 + 2 centigrade, greater than 0.08MPa
Chopping impact: there is no visible crack in the outer guard tube.