PIPE LAY TENSION

1.0 INPUT DATA

Length of Pipe L 52.5m

Outer Diameter OD 6.625in

Pipeline Wall Thickness t 0.5in

Density of Steel ρst 7850 kg m3

Corrosion Coating Thickness tcorr 2.5mm

Corrosion Coating Density ρcorr 950kg m3

Concrete Coating Thickness tconc 0mm

Corrosion Coating Density ρconc 3044kg m3

Sea Water Denisty ρsw 1025kg m3

2.0 CALCULATION

Total Outer Diameter: Dtot OD 2tcorr 2 tconc Dtot 0.173 m

Pipe Area Apipeπ

4OD

2OD 2 t( )

2 Apipe 9.621 in

2

Corrosion Coat. Area Acorrπ

4OD 2 tcorr 2 OD

2

Acorr 2.079 in

2

Insulation Coat. Area Aconcπ

4OD 2 tcorr 2 tconc 2 OD 2 tcorr 2

Aconc 0 in

2

Massa of Pipe Mpipe Apipe L ρst Mpipe 2.558 103

kg

Massa of Corrotion Coat Mcorr Acorr L ρcorr Mcorr 66.896 kg

Massa of Concrete Coat Mconc Aconc L ρconc Mconc 0 kg

Total Mass Mtot Mpipe Mcorr Mconc Mtot 2.625 103

kg

Volume Total Vtot Acorr Apipe Aconc LVtot 0.396 m

3

Lay Tension Tens Mtot ρsw Vtot g Tens 21.759 kN