5 Bending Maximum Allowable Turning Nominal Radius1 Deflection, H, for 100-ft Angle Pipe Size ( R) (30 m) Bending Length, S ( ) ( in) (mm) ( ft) ( m) ( ft) ( m) ( deg) 2 50 69.4 21 17.5 5.3 84 3 80 101.1 31 12.1 3.7 57 4 100 129.9 40 9.5 2.9 44 6 150 191.8 58 6.5 1.9 30 8 200 250 76 5.0 1.5 23 10 250 312 95 4.0 1.2 18 12 300 370 113 3.4 1.0 15 14 350 410 125 3.2 0.9 14 16 400 410 143 2.7 0.8 12 1) Do not bend pipe until adhesive has cured. At rated pressure sharper bends may create excessive stress concentrations. Typical mechanical properties 70 °F 100°F 170°F 200°F ASTM Pipe Property1 Units 21°C 38°C 77°C 93°C Method Circumferential Tensile stress at weeping 103 psi 18.5 - - - D1599 MPa 128 - - - Tensile modulus 106 psi 3.13 2.79 2.32 1.25 GPa 21.6 19.2 16.0 8.62 Poisson’s ratio 0.45 0.45 0.66 1.03 D2105 Longitudinal Tensile strength 103 psi 7.00 6.50 5.50 4.00 D2105 MPa 48.3 44.8 37.9 27.6 Tensile modulus 106 psi 1.45 1.31 1.00 0.52 D2105 GPa 10.1 9.03 6.89 3.59 Poisson’s ratio 0.35 0.35 0.43 - D2105 Beam apparent Elastic modulus 106 psi 1.40 0.78 0.44 0.18 D2925 GPa 9.65 5.40 3.00 1.24 Hydrostatic design basis (cyclic)2 103 psi - 6.0 - - D2992 MPa - 41.4 - - Nominal Stiffness Pipe Beam Moment Pipe Size Factor3 Stiffness3 of Inertia4 ( in) (mm) ( lb•in) (N•m) ( psi) ( MPa) ( in4) (106mm4) 2 50 340 38.4 1540 10.6 0.48 0.20 3 80 340 38.4 460 3.2 1.61 0.67 4 100 820 92.6 530 3.7 4.7 1.96 6 150 820 92.6 160 1.1 15.5 6.40 8 200 1180 133.3 105 .72 39 16.3 10 250 1180 133.3 53 .37 77 32 12 300 1180 133.3 31 .23 129 54 14 350 1330 150.2 36 .25 209 88 16 400 2190 247.4 38 .26 368 154 1) Based on structural wall thickness. 2) At 150°F (66°C). 3) Per ASTM D2412. 4) Use these values to calculate permissible spans. Bending radius 2α α H S c L
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