{
  "schema": "native-physical-interface-v1",
  "scope": "B::B-P070 and B::B-P071 physical treatment only",
  "instrument": {
    "direct_tracing": "process-wetted parts only; electronics/pneumatics excluded",
    "gauge_contact": "may contact pipe, not gauge in depicted applications",
    "lead_sizes_OD_in": [
      0.375,
      0.5
    ],
    "lead_sizes_printed_mm": [
      10,
      12
    ],
    "gauge_glass_displacer_OD_in": 0.5,
    "gauge_glass_displacer_printed_mm": 12,
    "dp_alternatives": [
      "remote paired traced/insulated leads",
      "line-mounted above/side layouts",
      "flanged level connection",
      "vessel-level connection"
    ],
    "covers": [
      "process heat conservation to gauge connection",
      "partial enclosure with heater block below receiver and flexible cover",
      "complete polyurethane enclosure with finned steam heater"
    ],
    "level_glass": [
      "jacketed",
      "externally traced with viewing glass uninsulated"
    ],
    "float_chamber": "cold-ambient wrap/coil for heating",
    "calibration_conditions": [
      "lead density",
      "elevation",
      "fill state",
      "reference communication",
      "instrument calibration"
    ],
    "removal": "without interrupting or removing tracing"
  },
  "equipment": {
    "hairpin_basis": "maximum count permitted by bend radius; heat delivery requires evaluation",
    "valve_small": "NPS3 and smaller; three spacers for isolated option",
    "size_conflict": "NPS3 3/8-inch tubing option versus all tubing 1/2-inch OD general note; not resolved",
    "valve_large": "NPS4 and larger isolated spacers at two-foot intervals",
    "large_line": "NPS8 and larger two tracers; second at end flanges and once at bonnet on bonneted valves",
    "union": "outside insulation and high point in valve detail",
    "panel": "prefabricated stainless panel formed to radius; optional factory nonhardening compound",
    "curvature": "below 7-inch (178-mm) outside radius and compound-curved vessel bottoms may use hairpins",
    "hairpin_compound": "embedded unless otherwise specified",
    "irregular_surface_spacing": "approximately 3 inches in illustrated cross section",
    "horizontal_vessel_bands": "1/2-inch \u00d7 0.020-inch stainless at 24-inch (600-mm) spacing",
    "vessel_flat_bars": "1/2-inch \u00d7 1/4-inch; length as required",
    "vertical_studs": "3/8-inch at approximately 24-inch (600-mm) centers",
    "cone_bottom_flat_bars": "1-1/2-inch \u00d7 1/4-inch; length as required"
  },
  "excluded": [
    "control architecture",
    "separate equipment supply/trap circuits",
    "bleed-ring supply/trap branches"
  ],
  "scale": "schematic; no numerical heat output or pressure selected"
}