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Calculators › Fixed Trunnion Ball Valve › Body Wall Thickness
Fixed Trunnion Ball Valve / ASME B16.34 Appendix F

Fixed Trunnion Ball Valve Body Wall Thickness

Valve body wall thickness per ASME B16.34 Appendix F: t = 1.5·Pc·(d/2) / (SF − 0.6·Pc). Verified against actual wall thickness and ASME minimum wall table.

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Reference: Qw347X 10" DIB-I / ASME B16.34 / API 6D / Valve Design Manual
Fixed Trunnion Ball Valve Body Wall Thickness

Why This Calculator

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ASME B16.34 App.F

Official Appendix F formula t = 1.5·Pc·(d/2)/(SF−0.6·Pc) for valve body pressure boundary.

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LF2 Material

Preset SF = 7000 psi stress basis for ASTM A350 LF2 low-temperature carbon steel.

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Dual Check

Verifies calculated t against actual wall t' and ASME table minimum tm'.

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Class 300 Preset

Defaults from Qw347X 10" design dossier: 300 psi, 10 in bore.

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Auto Pass/Fail

Instant verdict with safety margin in US customary units.

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Instant Result

Real-time calculation, no page reload, mobile friendly.

How It Works

Enter Pressure

Input calculation pressure Pc in lb/in².

Set Geometry

Enter bore diameter d in inches.

Material Stress

Set allowable stress SF (7000 for LF2).

Verify

Compare against actual and standard minimum wall.

Who Is It For

Valve Design EngineersASME Compliance TeamsQuality InspectorsPipeline Engineers

Key Highlights

ASME B16.34Class 300A350 LF2Appendix FAuto Pass/Fail

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