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Product Name: insulated steel pipe
Standard: SY/T 4015-1996
Specifications: 406.4 x 9.5 x 12000mm
Performance index of protective layer
Tensile strength: axial greater than 20 MPa, circumferential greater than 20 MPa, deviation less than 15%
Elongation at break: greater than or equal to 600%
Resistance to environmental stress cracking (F50): greater than or equal to 1000 h
Indentation hardness: 23 C + 2 C, less than 0.2 mm
50 C + 2 C, less than 0.3mm
Performance index of foam plastic layer
Apparent density: 40~60 kg/m3
Compressive strength: greater than or equal to 0.2 MPa
Water absorption; less than 0.03g/cm3
Thermal conductivity; less than 0.03W/m.
Heat resistance: size change rate, or less than 3%.
Weight change rate, or less than 2%,
The strength growth rate is greater than or equal to 10%.