5 Typical mechanical properties Value Method Pipe Property1 Units (2 - 6 in) (8 - 16 in) ASTM ATM2 Tensile strength Longitudinal 103 psi 35.0 20.0 D2105 161 MPa 240 138 Circumferential 103 psi 70.0 40.0 D1599 151 MPa 480 275 Tensile modulus Longitudinal 106 psi 3.0 1.5 D2105 161 GPa 20.6 10.3 Circumferential 106 psi 4.2 2.3 — — GPa 29.0 15.9 Compressive strength Longitudinal 103 psi 35.0 20.0 — 142 MPa 240 138 Compressive modulus Longitudinal 106 psi 3.0 1.5 — 142 GPa 20.6 10.3 Long-term hydrostatic design basis Static 103 psi 21 21 D2992(B) — MPa 145 145 Cyclic 103 psi 8 — D2992(A) — MPa 55 — Poisson’s ratio3 νyx — 0.16 0.11 — — νxy — 0.26 0.19 — — 1) Based on structural wall thickness. 2) Ameron test method. 3) The first subscript denotes the direction of contraction and the second that of the applied stress. x denotes longitudinal direction. y denotes circumferential direction. Nominal Change in Length Stiffness Pipe Size Due to Pressure1 Factor2 ( in) (mm) ( in/100 ft/100 psi) (mm/m/bar) ( lb•in3/ in2) ( N•m) 2 50 .284 343 42 4.7 3 80 .394 476 75 8.5 4 100 .477 576 60 6.8 6 150 .493 596 275 31.1 8 200 1.14 1376 500 56.5 10 250 1.19 1437 750 85 12 300 1.20 1450 1250 140 14 350 1.26 1523 1600 180 16 400 1.31 1583 2000 225 1) In an unrestrained system due to pressure effects alone. 2) At 5% deflection.
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