50 lines
1.8 KiB
JSON
50 lines
1.8 KiB
JSON
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{
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"title": "Wind Factor: Shielding Gas Displacement Model",
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"author": "Bernardo Zubko",
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"version": "1.0.0",
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"description": "Interactive calculator predicting TIG/MIG shielding gas breakdown under wind load. Grounded in AWS D1.1 environmental limits and ASME Section IX gas coverage requirements.",
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"constants": {
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"thresholds_mph": {
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"tig_gtaW": 5,
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"mig_gmaW": 10,
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"fluxcored_fcaW": 15
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},
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"compensation_coefficient_CFH_per_mph_squared": 0.15,
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"minimum_shield_effectiveness": 0.65,
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"argon_properties": {
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"density_kg_m3": 1.784,
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"viscosity_Pa_s": 2.25e-5,
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"thermal_conductivity_W_m_K": 0.0177
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},
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"air_properties_at_20C": {
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"viscosity_Pa_s": 1.8e-5,
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"density_kg_m3": 1.204
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}
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},
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"model": {
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"equation": "ΔQ = k × (V_wind - V_threshold)²",
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"variables": {
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"ΔQ": "Additional flow required (CFH)",
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"k": "Compensation coefficient (0.15 CFH/(mph)²)",
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"V_wind": "Measured wind speed (mph)",
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"V_threshold": "Process-specific breakdown threshold (mph)"
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},
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"effectiveness_ratio": "Q_base / Q_total",
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"verdict_logic": "STOP when effectiveness < 0.65 OR wind > threshold"
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},
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"sources": [
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{
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"standard": "AWS D1.1/D1.1M:2020",
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"section": "Section 6.2 Field Welding Environmental Controls",
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"note": "Wind velocity limits for shielded processes"
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},
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{
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"standard": "ASME Boiler & Pressure Vessel Code Section IX",
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"paragraph": "QW-442.2 Gas Coverage Requirements",
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"note": "Shielding gas integrity verification methods"
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}
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],
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"field_notes": "Tested on Custer Peak gate frame, October 2025. Plywood baffle at 30° reduced local wind from 12 to 6 mph. Argon 20 CFH maintained bead clarity after compensation.",
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"homepage": "https://bernardo-zubko.4ort.net/wind-factor.html"
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}
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