18in Floater Design and Install Calc. Worksheet

 BUOYANCY CALCULATION FOR 28" TWIN FLOATS PIPELINE DATA PIPE THK -t s (m) SIZE (in)

OD (m)

tsi

tsii

UNIT LENGTH - L a (m)

CONC THK -t conc (m)

28

7.11E-01

4.00E-03

0.00E+00

3.00

0.00E+00

3

DENSITIES Kg/m

CREEK WATER STEEL -ρS

PE COAT -ρpe

CONC. COAT - ρpe

SWAMP -ρsw

ρw

7850

0.00

0.00

0

1025

CALCULATIONS 2

CASE tsi = tsii =

AREA (m )

WEIGHT (in air)

STEEL - AS

STEEL Ws

WEIGHT OF UNIT UNIT PIPE (in air)

8.88E-03

209.18

209.18

0.00E+00

0.00

0.00

PE COAT - Ape

PE COAT - Wpe

AVG. UNIT WGHT OF PIPE (in air)

BUOYANCY OF UNIT PIPE (Kg) MEDIUM

BUOYANCY

CREEK SWAMP

1220.95

tsi =

69.73

CREEK SWAMP

0.00E+00

0.00

CONC COAT - Aconc

CONC COAT Wconc

WGHT OF ABSORBED H2O IN UNIT PIPE - (3%)

0.00E+00

0.00

0.00

tsi = tsii =

0.00

SUBMERGED UNIT PIPE WGHT (Kg)

tsii =

0.00

 

 

-1011.77  

0.00

AVG UNIT SUBMERGED WGHT OF LINE PIPE (Kg/m)   -337.26 CREEK   0.00 SWAMP

Buoyancy of twin floats (1220.95kg x 2) =

2441.9kg

Neg. Buoyancy Buoyancy of unit pipe (Heavy (Heavy wall) =

2018.00

Total weight of Twin Float

=

613.55kg

Neg. Buoyancy of unit pipe (Light wall)

1741.00

Net Buoyancy of twin float

=

1828kg

No. of Twin Floats Floats per length of of 24" pipe =

2nos

=

No. of twin floats req'd per unit pipe (heavy wall) = 2nos No. of twin floats req'd per unit pipe (light wall) = 3nosx2joints

Buoyancy of unit Poly floats (29"x72") = 730kg No. of unit Poly floats req'd per unit pipe = 3nos

PE COAT THK -tpe (m) 0.00E+00

PIPELINE SPREAD LENGTH (m) 0.00 0.00 SUBMERGED PIPELINE SPREAD WGHT (Kg)

0.00 0.00 TOTAL SUBMERGED PIPELINE SPREAD WGHT KPxx - Kpxy (Kg)

0.00

Water density taken as 1025