Nozzle / Fabrication Detail Drawing

{
  "title_block": "<common>",
  "drawing_title": "str",
  "parent_equipment_tag": "str",
  "design_code": "str",
  "material_standards": ["str"],
  "nozzle_details": [
    {
      "nozzle_mark": "str", "size_dn": "str",
      "scale": "str", "detail_description": "str",
      "components": [
        {"item": "str", "description": "str", "material_spec": "str",
         "size": "str", "install_qty": "int", "spare_qty": "int",
         "weight_kg": "num"}
      ],
      "flange_rating_class": "str", "flange_facing": "str",
      "gasket_type": "str", "gasket_material": "str",
      "stud_bolt_spec": "str", "stud_bolt_length_mm": "num",
      "reinforcement_pad": {
        "required": "bool", "od_mm": "num", "id_mm": "num",
        "thickness_mm": "num", "material": "str", "tell_tale_hole": "str"
      },
      "nozzle_neck_thickness_mm": "num",
      "projection_from_cl_mm": "num",
      "surface_roughness_um": "num",
      "total_weight_kg": "num"
    }
  ],
  "welding_notes": ["str"],
  "leak_test_pressure_barg": "num",
  "reference_drawings": [
    {"drawing_number": "str", "description": "str"}
  ],
  "general_notes": ["str"],
  "revision_history": [
    {"revision": "str", "date": "str", "description": "str",
     "drawn_by": "str", "checked_by": "str",
     "engineered_by": "str", "approved_by": "str"}
  ]
}