{
  "schema": "piping-educational-ring-groove/v1",
  "object_id": "c03-ring-groove-compatibility",
  "scope": "Illustrated oval/octagonal ring family and selected flat/rounded groove bottoms; profile relationship only, not arbitrary ring interchangeability.",
  "profile_pairs": [
    {
      "ring": "oval",
      "groove_bottom": "flat",
      "profile_pair_permitted": true
    },
    {
      "ring": "oval",
      "groove_bottom": "rounded",
      "profile_pair_permitted": true
    },
    {
      "ring": "octagonal",
      "groove_bottom": "flat",
      "profile_pair_permitted": true
    },
    {
      "ring": "octagonal",
      "groove_bottom": "rounded",
      "profile_pair_permitted": false
    }
  ],
  "pitch_example": {
    "reference_diameter_1_in": "4.625",
    "reference_diameter_2_in": "4.875",
    "diameter_difference_in": "0.250",
    "diameter_difference_mm": "6.350",
    "radial_difference_in": "0.125",
    "radial_difference_mm": "3.175",
    "scope": "Geometric comparison of specified reference details; no allowed mismatch/machining allowance or seal acceptance supplied"
  },
  "actual_checks": [
    "Ring/groove dimensions and material",
    "Facing/pitch geometry and actual selected mating pair",
    "Bolt engagement/assembly datums and adopted tightening",
    "Service/seating/examination and restoration"
  ],
  "project_acceptance": false,
  "contact_model": {
    "coordinate_units": "diagram units only",
    "flank_angle_deg": 23,
    "ellipse_center": [
      100,
      75
    ],
    "ellipse_radii": [
      28,
      46
    ],
    "left_flank_x_equals_a_y_plus_b": {
      "a": 0.42447481620960476,
      "b": 34.028506079045385
    },
    "left_contact": [
      77.03296537634914,
      101.31215717652437
    ],
    "right_contact": [
      122.96703462365086,
      101.31215717652437
    ],
    "scope": "Dimensionless elliptical reference shape tangent to illustrated selected23degree flanks; no actual ring dimensions/material/compression/seatingload."
  },
  "pitch_graphic": {
    "common_center": [
      745,
      805
    ],
    "diameter_1_in": 4.625,
    "diameter_2_in": 4.875,
    "radius_1_diagram_units": 104.35897435897436,
    "radius_2_diagram_units": 110,
    "scope": "Common-scale concentric reference pitch patterns, not physical OD or allowablealignment."
  }
}