API RP 1102 Uncased Road Crossing Assessment

Client PembinaProject SaturnLSD 12-36-57-23 W5M

Pipeline 6" LACTMaterial Z245.1 Grade 359 Cat II

API RP 1102 refInput Data

Outside diameter D 168.3 mmCorrosion allowance CA 0 mmWall thickness 4 mmCorroded wall thickness 4 mmInternal diameter 160.3 mmOperating pressure p 9930 kPaSteel grade SMYS 359 MPaDesign factor F 0.8 -Longitudinal joint factor E 1 -Temperature de-rating factor T 1 -Installation temperature 11

40Coefficient of thermal expansion 0.0000117 Table A-3Modulus of elasticity 207000 Table A-3Poisson ratio ν 0.3 - Table A-3Bored diameter 168.3 mmSoil type AModulus of soil reaction E' 3.4 MPa Table A-1Resilient modulus 34 MPa Table A-2Soil unit weight γ 1950Pavement typePoisson ratio ν 0.3Singel axle load SAL 106800 NTandem axle load TAL 177900 NWheel load WLS 53400 NWheel load WLT 44475 NArea load acting ALA 0.093

Burial depth H 1.2 m

Fatigue (cyclic) stress endurance limits

Circumferential weld fatigue endurance limit 82.74 MPa Table 3Longitudinal weld fatigue endurance limit 82.74 MPa Table 3

Check allowable hoop stress

Hoop stress 204.058 MPa

tw

Di

T1 °CT2 °C α °C-1

Es

Er

kgfm-3

m2

SFG

SFL

SHi

Allowable maximum hoop stress 287.200 MPa

CHECK

Circumferential stress due to soil load

0.024Stiffness factor Khe 1200 Figure 3

H/Bd 0.0071.35 Figure 4

Bd/D 10.83 Figure 5

Circumferential stress SHe 4.413 MPa

Cyclic stress from wheel loads

Impact factor Fi 1.5 Figure 7Critical axle configuration tandemApplied design surface pressure w 0.478 MPa

Cyclic circumferential stress

Highway stiffnes factor KHh 14 Figure 14Highway geometry factor GHh 1 Figure 15Highway pavement type factor R 1.1 Table 2Highway axle configuration L 1

Cyclic circumferential stress ΔSHh 11.047 MPa

Cyclic longitudinal stress

Highway stiffnes factor KLh 12.5 Figure 16Highway geometry factor GLh 1.4 Figure 17Highway pavement type factor R 1.1 Table 2Highway axle configuration L 1

Cyclic longitiudinal stress ΔSLh 13.809 MPa

Allowable stress

Principal and effective stress

Maximum circumferential stress 219.518 MPaMaximum longitudinal stress 6.115 MPaMaximum radial stress -9.930 MPa

Total effective stress 221.861 MPaDesign stress factor 0.9Allowable effective stress 323.100 MPa

ASHi

tw/D

Be

Ee

S1

S2

S3

Seff

Fy

CHECK OK

Fatigue (cyclic) stresses

Circumferential weld

SFh 82.74 MPaΔSLh 11.047 MPa

CHECK OK

Longitudinal weld

SFl 82.74 MPaΔSLh 13.809 MPa

CHECK OK

InputCalculatedFrom API RP 1102 Tables and Figures

OKWARNING