F&D Head Design Tool ver
E5.06
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Description
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Dimensions:
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Do [in] - outside diameter of head
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L [in] - inside crown radius (note 1)
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IKR [in] - inside knuckle radius (note
2)
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tb [in] - thickness before forming
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tf [in] - thickness after forming
(note 3)
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Corr [in] - corrosion allowance
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Skirt [in] - straight skirt length
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Material and Conditions:
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This sheet is for educational use only - use at
your own risk.
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Material
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See UCS-79(d), UNF-79(d), UG-37(a)(1) for head
stress relief.
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S [psi] - allowable stress
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L and IKR per UG-32(j) are optional, other values
can be used.
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E - head efficiency
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This sheet cannot be used to check for vacuum
loads.
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P [psi] - interior pressure
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App. 1-4(f) and UG-16(b) calculations are not
included
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Calculated Properties:
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Pounds [steel] =
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note 1: L per UG-32(j) =
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Volume (with skirt) [cuft] =
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note 2: IKR per UG-32(j) =
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Ro [in]= L+tb =
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note 3: Likely tf =
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M = 0.25*(3+sqrt(L/IKR))
=
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nt [in] = tf-Corr =
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Required Thickness: App.
1-4(a), App. 1-4(d)
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Treq [in] =
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(P*L*M)/(2*S*E-0.2*P)+Corr
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Maximum Pressure: App. 1-4(a),
App. 1-4(d)
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Pmax [psi] =
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(2*S*E*nt)/(L*M+0.2*nt)
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Pressure Vessel Engineering Ltd.
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Finite Element Analysis ASME Code Calculations Canadian Vessel Registration
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120 Randall Drive, Suite B, Waterloo, Ontario,
Canada, N2V 1C6. 519 880-9808
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www.pveng.com
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