Typical mechanical properties Nominal Stiffness Pipe Beam Moment Pipe Size Factor1 Stiffness of Inertia2 ( in) (mm) ( lb•in) ( N•m) ( psi) ( MPa) ( in4) (106 mm4) 1 25 770 87 26400 182 0.09 0.037 11⁄2 40 1610 182 17200 119 0.36 0.150 23 50 265 30 1350 9.3 0.46 0.191 33 80 285 32 550 3.80 1.57 0.653 43 100 500 56 335 2.30 4.13 1.72 63 150 925 104 200 1.40 16.5 6.87 8 200 1890 214 170 1.17 45.1 18.8 10 250 1890 214 86 0.59 88.6 36.9 12 300 1890 214 51 0.35 149.0 62.0 14 350 2230 252 46 0.32 208.0 86.6 16 400 3250 367 45 0.31 353.0 147.0 1) Per ASTMD2412. 2) Use these values to calculate permissible spans. 3) No-shave pipe. Typical physical properties Pipe Property Units Value ASTM Method Nominal Pipe Size 1”, 11/2 ” 2”-6” 8”-16” Thermal conductivity Pipe wall Btu•in/(hr•ft2•°F) 2.00 1.70 C177 W/m•°C 0.29 10.25 Thermal expansion Linear 10 -6 in/in/°F 10.00 8.50 D696 10 -6 mm/mm°C 18.00 15.30 Flow coefficient Hazen-Williams 150.00 150.00 _ Absolute roughness 10 -6 ft 17.40 17.40 _ 10 -6 m 5.30 3.30 Specific gravity - 1.80 1.80 D792 Density lb/in3 0.07 0.07 g/cm3 1.80 1.80 5 70 °F 200 °F ASTM Pipe Property Units 21 °C 93 °C Method Nominal Pipe Size 1”, 11/2 ” 2”-6” 1”, 11/2 ” 2”-6” 8”-16” 8”-16” Circumferential Tensile stress at weeping 103 psi 24.00 32.00 - - D1599 MPa 165.00 22.00 - - Tensile modulus 106 psi 3.65 4.20 3.20 3.70 GPa 25.20 29.00 22.10 25.50 Poisson’s ratio 0.56 0.26 0.70 0.32 D2105 Longitudinal Tensile strength 103 psi 8.50 16.00 6.90 13.00 D2105 MPa 58.60 110.00 47.60 90.00 Tensile modulus 106 psi 1.60 3.00 1.24 2.40 D2105 GPa 11.00 20.70 8.50 16.50 Poisson’s ratio 0.37 0.16 0.41 0.20 D2105 Beam apparent Elastic modulus 106 psi 1.70 2.40 1.00 1.77 D2925 GPa 11.70 16.60 6.90 12.20 Hydrostatic design basis (cyclic) 103 psi 6.001 16.001,2 - - D2992 MPa 41.40 110.00 - - 1) At 150°F (66°C). 2) Static
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