{
  "title": "Casting major-repair route: independent eligibility conditions",
  "scope": "Specified pressure-casting material supplementary repair route; supplied grade/material specification and service definitions govern, not universal casting acceptance.",
  "major_if_any": [
    "Hydrostatic test leakage",
    "Prepared cavity depth exceeds min(0.20*wall thickness,1in)",
    "Cavity area exceeds approximately10in²",
    "Defined hydrogen service",
    "Internal repair surface exposed to defined SCC service"
  ],
  "hypothetical_examples": [
    {
      "wall_in": 2.0,
      "depth_threshold_in": 0.4,
      "cavity_depth_in": 0.45,
      "depth_condition": true
    },
    {
      "cavity_depth_in": 0.1,
      "defined_SCC_interior": true,
      "service_condition": true
    }
  ],
  "sequence": [
    "Establish actual defect/location/material/service and engineering disposition",
    "Record major cavity geometry by sketch/photos",
    "Qualified procedure/personnel; cavity surface examination before welding",
    "Material-specific final treatment",
    "Final examination after treatment, no less type/extent than original detection and required minimum surface examination"
  ],
  "treatment_example": "Weld-repaired SA351 austenitic castings:specified supplementary postweld solution treatment except HK,HT,CT15C. Not a general no-treatment permission.",
  "limitations": [
    "Major classification does not accept damaged casting.",
    "Approximate area/rounded metric statement not an exact substituted threshold.",
    "Previous test does not qualify new repaired state."
  ]
}