by William Wijaya v1.4
Joints per bay, stack height, total joints and dead weight for each pipe type on each material barge. Pipe lies lengthwise in bays across the beam.
A voyage file holds the pipe properties, quantities, barge sizes and assumptions for one voyage. Save one file per voyage and load it back later. Print opens your browser print dialog. If nothing happens, for example inside the Claude preview, use Save PDF report and print the PDF.
| Name | OD | Unit | Wall thickness (mm) | Corrosion coat (mm) | Concrete coat (mm) | Calculated weight (kg/m) | Override weight (kg/m) | Quantity (joints) |
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Calculated weight is steel, corrosion coating and concrete in air, averaged over the joint after the cut-backs below. Type a value under Override to use your own weight, leave it blank to use the calculated one. Wall thickness and coating thicknesses are examples, replace with your own. Quantity is the number of joints to ship.
The corrosion coating is on the steel and the concrete is on top of the corrosion coating, so the concrete inner diameter is the coated diameter, not the bare OD.
ID = OD - 2 x wall
Dc = OD + 2 x corrosion coating (outer diameter of coated pipe = concrete inner diameter)
Dk = Dc + 2 x concrete coating (outer diameter of concrete)
Lc = L - 2 x corrosion cut-back (coated length)
Lk = L - 2 x concrete cut-back (concrete length)
Steel = pi/4 x (OD^2 - ID^2) x L x steel density
Corrosion = pi/4 x (Dc^2 - OD^2) x Lc x corrosion density
Concrete = pi/4 x (Dk^2 - Dc^2) x Lk x concrete density
(any concrete length beyond the coated length sits on bare steel: inner diameter OD)
Unit weight (kg/m) = (Steel + Corrosion + Concrete) / L
| Barge | Length (m) | Width (m) | Clear width for pipe (m) | Max DWT (t) | Bays of pipe |
|---|
Clear width is the deck width available for pipe, and sets the joints in the first layer. Each bay is one lot of pipe joints in line along the deck: 5 bays for the 250 ft barge, 6 for 280 to 330 ft. Lengths and widths are in metres; the barge name keeps the imperial size. Set the max DWT to load and max stack height for each barge in the Loading plan. Clear widths shown are examples, replace with your own.
First layer joints = clear width ÷ loaded pipe diameter, rounded down. Each layer above has one fewer joint. Every bay holds the same pyramid, one 12.2 m joint long.
List the material barges to load, for example PHB#1, PHB#2, PHB#3, and pick a size for each. Pipe fills them in order.
| Barge | Size | Max DWT to load (%) | Max stack height (m) |
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