Critical Distance between Stiffeners Calculator

✖Outer Diameter of Vessel is the distance from one outside edge of the vessel to the opposite outside edge, measuring straight across the face of the vessel.ⓘ Outer Diameter of Vessel [OD_Vessel]			+10% -10%
✖Wall Thickness is simply the width of the wall that we are taking under consideration.ⓘ Wall Thickness [t]			+10% -10%

✖Critical Distance between Stiffeners when are spaced within critical length, they offer resistance to collapsing of the vessel under external pressure.ⓘ Critical Distance between Stiffeners [L_c]

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Formula

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Critical Distance between Stiffeners

Formula

`"L"_{"c"} = 1.11*"OD"_{"Vessel"}*("OD"_{"Vessel"}/"t")^0.5`

Example

`"496.4071mm"=1.11*"1000mm"*("1000mm"/"5000mm")^0.5`

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Critical Distance between Stiffeners Solution

STEP 0: Pre-Calculation Summary

Formula Used

Critical Distance between Stiffeners = 1.11*Outer Diameter of Vessel*(Outer Diameter of Vessel/Wall Thickness)^0.5
L_c = 1.11*OD_Vessel*(OD_Vessel/t)^0.5
This formula uses 3 Variables

Variables Used

Critical Distance between Stiffeners - (Measured in Meter) - Critical Distance between Stiffeners when are spaced within critical length, they offer resistance to collapsing of the vessel under external pressure.
Outer Diameter of Vessel - (Measured in Meter) - Outer Diameter of Vessel is the distance from one outside edge of the vessel to the opposite outside edge, measuring straight across the face of the vessel.
Wall Thickness - (Measured in Meter) - Wall Thickness is simply the width of the wall that we are taking under consideration.

STEP 1: Convert Input(s) to Base Unit

Outer Diameter of Vessel: 1000 Millimeter --> 1 Meter (Check conversion here)
Wall Thickness: 5000 Millimeter --> 5 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

L_c = 1.11*OD_Vessel*(OD_Vessel/t)^0.5 --> 1.11*1*(1/5)^0.5

Evaluating ... ...

L_c = 0.496407091004953

STEP 3: Convert Result to Output's Unit

0.496407091004953 Meter -->496.407091004953 Millimeter (Check conversion here)

FINAL ANSWER

496.407091004953 ≈ 496.4071 Millimeter <-- Critical Distance between Stiffeners

(Calculation completed in 00.004 seconds)

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< 5 Design of Vessels Subjected to External Pressure Calculators

Thickness of Flange

Go Thickness of Flange = (Diameter of Gasket at Load Reaction)*(sqrt((Design Pressure)/(Coefficient Value for Thickness of Flange*Permissible Stress)))+Corrosion Allowance

Critical Distance between Stiffeners

Go Critical Distance between Stiffeners = 1.11*Outer Diameter of Vessel*(Outer Diameter of Vessel/Wall Thickness)^0.5

Moment of Inertia of Stiffening Ring per Unit Length

Go Moment of Inertia of Stiffening Ring = ((External Pressure*(Outer Diameter of Vessel^3))/(24*Young's Modulus))

Length of Conical Head

Go Length of Conical Head = (Outside Diameter at Larger End of Cone/2)*(tan(Apex Angle))

Width of Gasket

Go Width of Gasket = (Outside Diameter of Gasket-Inside Diameter of Gasket)/2

Critical Distance between Stiffeners Formula

Critical Distance between Stiffeners = 1.11*Outer Diameter of Vessel*(Outer Diameter of Vessel/Wall Thickness)^0.5
L_c = 1.11*OD_Vessel*(OD_Vessel/t)^0.5

What are Stiffeners?

Stiffeners are secondary plates or sections which are attached to beam webs or flanges to stiffen them against out of plane deformations. Almost all main bridge beams will have stiffeners..

How to Calculate Critical Distance between Stiffeners?

Critical Distance between Stiffeners calculator uses Critical Distance between Stiffeners = 1.11*Outer Diameter of Vessel*(Outer Diameter of Vessel/Wall Thickness)^0.5 to calculate the Critical Distance between Stiffeners, Critical Distance between Stiffeners when are spaced within critical length, they offer resistance to collapsing of the vessel under external pressure. Critical Distance between Stiffeners is denoted by L_c symbol.

How to calculate Critical Distance between Stiffeners using this online calculator? To use this online calculator for Critical Distance between Stiffeners, enter Outer Diameter of Vessel (OD_Vessel) & Wall Thickness (t) and hit the calculate button. Here is how the Critical Distance between Stiffeners calculation can be explained with given input values -> 496407.1 = 1.11*1*(1/5)^0.5.

FAQ

What is Critical Distance between Stiffeners?

Critical Distance between Stiffeners when are spaced within critical length, they offer resistance to collapsing of the vessel under external pressure and is represented as L_c = 1.11*OD_Vessel*(OD_Vessel/t)^0.5 or Critical Distance between Stiffeners = 1.11*Outer Diameter of Vessel*(Outer Diameter of Vessel/Wall Thickness)^0.5. Outer Diameter of Vessel is the distance from one outside edge of the vessel to the opposite outside edge, measuring straight across the face of the vessel & Wall Thickness is simply the width of the wall that we are taking under consideration.

How to calculate Critical Distance between Stiffeners?

Critical Distance between Stiffeners when are spaced within critical length, they offer resistance to collapsing of the vessel under external pressure is calculated using Critical Distance between Stiffeners = 1.11*Outer Diameter of Vessel*(Outer Diameter of Vessel/Wall Thickness)^0.5. To calculate Critical Distance between Stiffeners, you need Outer Diameter of Vessel (OD_Vessel) & Wall Thickness (t). With our tool, you need to enter the respective value for Outer Diameter of Vessel & Wall Thickness and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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