Flange Spec. According to the pipe size and type of clients' draft, Made from fiberglass reinforced plastic, Corrosion resistance Lightweight, easy to transport., Durable under high temperature and high pressure, cast in mold, Long service life. Technical parameter: Specific weight: 1.9 Tensile strength of hoop (MPa): 550 Tensile modulus of hoop (GPa): 24.6 Tensile strength of axial (MPa): 150 Tensile modulus of axial (GPa): 12.3 Flexural strength (MPa): 115 Flexural modulus GPa): 10.9 Impact strength of shearing (MPa): 97 Elongation at break (%): 0.3 Compressive strength (MPa): 510 Mean coefficient of linear expansion (oC): 12x10~-6.