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ADDITIONAL BUOYANCY REQUIREMENT CALCULATION FOR 24" PIPELINE PIPELINE DATA PIPE THK -ts (m) SIZE (in)
OD (m)
tsi
tsii
24
6.10E-01
1.11E-02
1.27E-02
UNIT LENGTH - La CONC THK -tconc PE COAT THK tpe (m) (m) (m) 12.20
6.50E-02
3.50E-03
DENSITIES Kg/m3 CREEK WATER STEEL -ρS
PE COAT -ρpe
CONC. COAT -ρpe
SWAMP -ρsw
ρw
7850
1840
3040
1249
1025
CALCULATIONS 2
CASE tsi = tsii =
AREA (m )
WEIGHT (in air)
STEEL - AS 2.09E-02 2.38E-02
STEEL Ws 2004.41 2281.16
WEIGHT OF UNIT PIPE (in air) 7318.27 7595.02
BUOYANCY OF UNIT PIPE (Kg) MEDIUM
BUOYANCY
SWAMP CREEK
6674.72 5477.65
PIPELINE SPREAD LENGTH (m) 4642 208 SUBMERGED
PE COAT - Ape
PE COAT - Wpe
tsi = tsii =
6.74E-03
CONC COAT - Aconc tsi = tsii =
1.39E-01
151.35
CONC COAT - Wconc 5162.51
AVG. UNIT WGHT PIPELINE SPREAD WGHT (Kg) OF PIPE (in air) SUBMERGED UNIT PIPE WGHT (Kg) 599.86
SWAMP
798.43
303794.82
622.54
CREEK
2272.24
38739.85
WGHT OF ABSORBED H2O IN UNIT PIPE (3%)
TOTAL SUBMERGED PIPELINE SPREAD AVG UNIT SUBMERGED WGHT OF WGHT KPxx Kpxy (Kg) LINE PIPE (Kg/m)
SWAMP CREEK
154.88
TOTAL REQUIRED BUOYANCY TO FLOAT PIPE SPREAD KP0.501 TO KP3.024 (MTon) === IF CAPACITY OF UNIT POLY FLOAT (Kg) = TOTAL NO. OF FLOATS REQUIRED (KP15.450 TO KP20.300)=
750 456.71
Note: * Field joints are preliminarily assumed to be PE-coated + Concrete-coated. * Pipe unit length was assumed to be 12.16m
