Double Diameter Tower Estimation App



Pressure/vacuum, includes vessel shell, heads, transition section, single base material, lined or clad, nozzles, manholes (one manhole below and above tray stack or packed section and one manhole every tenth tray or 25 FEET [7.6 M] of packed height), stiffening rings if desired, base ring, lugs, skirt or legs; tray clips, tray supports (if designated), distributor piping, plates, packing (if packing designated ); variety of applications for plate and packed towers: absorption, desorption, distillation or stripping (via kettle or thermosiphon reboiler defined separately), extraction; applications for packed towers:
gas and liquid adsorption; sections can be trayed, packed, empty. Ladders and platforms not included. (See Single Diameter Towers for tray stacks.)


PARAMETER SPECIFICATION
Default: *ABSORB* ABSORB- Absorption
DESORB- Desorption
DISTIL- Distillation with thermosiphon reboiler
DIS-RB- Distillation with kettler reboiler (not included)
EXTRAC- Extraction
GAS-AD- Gas adsorption
LIQ-AD- Liquid adsorption
STRIPP- Stripping with thermosiphone reboiler
STR-RB- Stripping with kettle reboiler
Base material Bottom: For clad plate, specify the backing plate material
(cladding is defined below).
Design gauge pressure Bottom.: Default: Specified top section pressure, or 50 PSIG
[350 KPA]: negative for vacuum.
Design temperature Bottom: Default: Specified top section temp or 250 DEG F [120 DEG C].
Packing material Bottom: See materials list.
Default: *NONE*
Packing height Bottom: Default: *0.0* FEET [*0.0* M]
Cladding material Bottom: See materials list.
Default: *NONE*
Skirt height: Default: 1.5 x bottom diameter; enter 0.0 if vessel
hung in OPEN structure.
Manhole diameter Bottom: Max: 48 INCHES [1,200 MM]
Thickness Bottom section: Base material thickness including corrosion allowance.
Corrosion allowance Bottom: Default: 0.125 INCHES [3 MM] for CS,
0.0 for other materials.
Cladding thickness Bottom: Default: 0.125 INCHES [3 MM] if cladding material is
specified; otherwise: 0.0.
Stiffening ring spacing Bottom: Default stiffeners designed for vacuum only, enter 0.0
if not required.
Base material Top: For clad plate, specify the backing plate material
(cladding is defined below). See materials list.
materials. Default: *A 515*
Design gauge pressure Top: Default: Specified bottom section pressure or 50 PSIG
[350 KPA]; negative for vacuum.
Design temperature Top: Default: Specified bottom section temperature or 250
DEG F [120 DEG C].
Packing material Top: See materials list.
Default: *NONE*
Packing height Top: Default: *0.0* FEET [*0.0* M]
Cladding material Top: See materials list.
Default: *NONE*
Pipe material Top: See Chapter 18 for pipe materials.
Manhole diameter Top: Max: 48 INCHES [1,200 MM]
Thickness Top section: Base material thickness including corrosion allowance.
Corrosion allowance Top: Default 0.125 INCHES [3 MM] for CS, 0.0 for other
materials.
Cladding thickness Top: Default: 0.125 INCHES [3 MM] if cladding material is
specified; otherwise: 0.0.
Stiffening ring spacing Top: Default stiffeners designed for vacuum only, enter 0.0
if not required.
Wind or seismic design: Default: Vessel designed for wind and seismic loads
defined in project basis.
W+S- Wind and seismic design required
WIND- Wind design only
SEIS- Wind/seismic design
NONE- Delete wind and seismic design
Fluid volume: Max: 100; Default: *20*; For seismic design, fluid
volume as a% of vessel volume (water assumed).
Vacuum design gauge pressure: If pressure and vacuum entered, design is for worst
case. Default: pressure.
Weld efficiency: 50 – 100; ASME/JIS codes only, where allowed for thin
wall vessels; Default: Area Design Basis.
Stress relief: Default: See Area Design Basis.
CODE- Provide stress relief if code requires
YES- Provide stress relief
NO- No stress relief required
Molecular weight Overhead prod: Default: 50 for distillation and stripping applications;
otherwise 30.
Number body flange sets Bottom: Number of sets (pairs) of body flanges of same
diameter as vessel.
Number body flange sets Top: Number of sets (pairs) of body flanges of same
diameter as vessel.
Diameter option: Defines desired diameter as ID or OD;
Default: See Area Design Basis.
OD- Outside diameter
ID- Inside diameter
ASME design basis: Default: *D1NF*, applicable only for
ASME code design.
D1NF- ASME Division 1 – no fatigue analysis
D1F- ASME Division 1 – with fatigue analysis
D2NF- ASME Division 2 – no fatigue analysis
D2F- ASME Division 2 – with fatigue analysis



Materia Cost Factors can vary dramatically and should be used with judgement.


PROCEDURE


  • Obtain the costs for Vessel Shells and Heads from tables shown,  diameters from 24″ through 144″ based on the thickness and type of Plate used and the type of X-Ray inspection are included.
  • Cost for Stress Relief is not included and must be added when mandatory or required by design.
  • The Shells are shown with a net theoretical fabricated weight in pounds per lineal foot. When estimating Vessel weights, Stress Relief costs, and Freight costs, Shell weights should be increased by the following percentages to allow for overweights:

Plate Thickness

Add For Overweights

1/4″10.00%
5/16″9.00%
3/8″7.88%
7/16″6.38%
1/2″ & 9/16″6.00%
5/8″ & 11/16″5.25%
3/4″ Through 2″4.50%

The above percentage represents 75% of the maximum allowable overweights for Plates ordered to thickness in widths from 120″ to, but not including, 132″. Overweights have no effect on Shell Material costs or Fabrication costs. It is not necessary to add overweights to Heads.

  • All costs for Shells are expressed in dollars per lineal foot. The per lineal foot cost includes all Material and Fabrication costs.
  • Pressure Vessel Shell lengths are usually designated as Tangent to Tangent. The Vessel Heads up to 1-1/2″ thick have been estimated with 1-1/2″ straight Flanges. Vessel Heads over 1-1/2″ thick have been estimated with 2″ straight Flanges. When Shell lengths are calculated as Tangent to Tangent deduct the straight Flange lengths of the Heads. When Shell Lengths are calculated as Head Seam to Head Seam do not deduct the straight Flange lengths of the Heads.
  • Costs of Semi-Elliptical (SE) Heads  include all Material and Fabrication costs. These heads may also be referred to as Flanged and Dished (F&D) Heads. The term “2:1” speaks to the ratio of the inside radius of the Head to the height of the ellipse.
  • The costs shown  do not include Nozzles, Manways, Skirts or other appurtenances. For Estimating costs complete with appurtenances
    • PRESSURE VESSEL APPURTENANCES
      After completing costs for Shells and Heads, it will be necessary to add for the following when required:
      1. Wear Plates and Saddles for Horizontal Vessels
      2. Angle Legs for Vertical Vessels
      3. Skirts For Vertical Vessels
      4. Threaded Coupling Type Nozzles
      5. Buttweld Flange Type Nozzles and Manways
      6. Long Weld Neck Type Nozzles and Manways
      7. Nozzle Extensions and Internal Piping
      8. Drip Legs
      9. Baffles, Drawoff Boxes, Vortex Breakers and Ladder Rungs
      10. Tray Rings For Removable Type Trays
      11. Installation of Removable Type Trays
      12. Installation of Demisting Pads
      13. Insulation Supports and Vacuum Stiffeners
      14. Ladder, Platform and Pipe Support Clips, Lifting Lugs and Davit Sockets
      15. Some Vessels may require fabricated items not specifically detailed in the foregoing and, if so, must be estimated and added:
        • Removable Type Trays
        • Demisting Pads
  • Costs are average for the United States at any port accross USGC
  • Add See transtortation Freight to Country jobsite and all related expences for Custom duties.



Vertical Pressure Vessel Cost Estimation.


1 ft
1 ft
1 ft

Remarks


** Warning ** Please be sure that, Diameter B must be larger than Diameter A

Feet

Vertical Pressure Vessel Configuration


8 ft

Vertical Pressure Vessel Output Data.


Total Shell Cost USD :

Total Shell Cost USD :

Total Shell Cost USD :

Total Shell Weight (LBS) :

Total Shell Weight (LBS) :

Total Shell Weight (LBS) :


2 Heads Cost USD :

2 Heads Cost USD :

Total 2 Heads Weight (LBS) :

Total 2 Heads Weight B (LBS) :


Vertical Pressure Vessel Additions.


Skirt Cost USD :

Skirt Cost USD :

Angle Legs & Base Cost USD :

Skirt Weight LBS :

Skirt Weight LBS :

Angle Legs & Base Weight LBS :


Vertical Pressure Vessel – Cost Summary.



Total Vessel Cost (USD) :


Total Vessel Weight (LBS) :

Total Vessel Weight (LBS) :

Vertical Pressure Vessel – Installation Mhrs Summary.


When the Pressure Vessel is received at the project site, it will be necessary to unload, inspect, transport to point of installation, install and perform the cleanup work occasioned by the foregoing.
Installation Manhours shown include Crane Operators time but does not include Crane Rental Costs.


Total Installation (Mhrs) :

Total Installation (Mhrs) :

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