{
  "title": "Thermal and set-on graph lookup quantities",
  "thermal_lookup": [
    "Initialwall25°C versus150°C; covered-electrode carbon/carbon-manganesesteel scope",
    "Matchfirstfillet/secondfillet/bead-plate-buttering heatinputscale",
    "Actualwallta versusdisplayedsquaredscale; retainunits",
    "Readmaximuminnerwalltemperature andpenetration separately; retaincollapse/risk/hatching/trans3dregions",
    "No initial-stateinterpolation/hiddengraphformula; sourcehorizontalextensionprovision alone notfullqualification",
    "Graph/checklist4.8mm versusbodycoupled5mm unresolved; no rounddown/strictselect"
  ],
  "seton": {
    "stress_family": "F=actualoperatinghoopstress/SMYS, not automaticallydesignfactor",
    "curve": "D/ta actualrundiameter/metalwall",
    "horizontal": "d/D outsidebranch/run diameterratio",
    "vertical": "PT/PA",
    "assumptions": [
      "Equalbranch/runwall inplot",
      "Thinnerbranchdescribedconservative; otherwisealternateformula notsupplied",
      "SpecificloweronplotF.5 andd/D<.1conservativeuses, no generalextrapolation",
      "Branchcodetestceiling andactualwelding/process/equipmentconditions independent"
    ]
  },
  "hypothetical": {
    "D_mm": 400,
    "ta_mm": 8,
    "d_mm": 200,
    "SMYS_N_mm2": 245,
    "PA_MPa_gauge": 5.88,
    "hoop_N_mm2": 147,
    "F": 0.6,
    "D_over_ta": 50,
    "d_over_D": 0.5,
    "rounded_plot_read_PT_over_PA": 0.55,
    "authored_coarse_teaching_read_band": [
      0.5,
      0.6
    ],
    "PT_MPa_gauge": 3.234,
    "PT_band_MPa_gauge": [
      2.94,
      3.528
    ],
    "limits": "Roundedselectedgraphobservationandhypotheticalcoordinate arithmetic; no testpressureapproval, fullcurve recreation oraccuracycriterion"
  },
  "geometry": "Originalauthoredaxispointband andrun-branch input map; no complete designcurve supplied"
}