{
  "profile": "0,100\n3000,110\n6000,105\n8000,115\n10000,120",
  "material_id": "carbon_steel",
  "outer_diameter_mm": 500,
  "wall_thickness_mm": 10,
  "roughness_mm": 0.045,
  "pipe_elastic_modulus_gpa": 203.3,
  "pipe_long_term_modulus_gpa": 203.3,
  "poisson_ratio": 0.3,
  "allowable_stress_mpa": 138,
  "rated_pressure_bar_g": 10,
  "pipe_segments": "0,6000,carbon_steel,500,10,10\n6000,10000,carbon_steel,500,14,16",
  "surge_allowance_factor": 1.2,
  "ovality_factor": 0.35,
  "vacuum_safety_factor": 2,
  "restraint_factor": 1,
  "nodes": 120,
  "temperature_c": 20,
  "atmospheric_pressure_kpa": 101.325,
  "initial_flow_m3_h": 900,
  "source_head_m": 100,
  "pump_head_m": 60,
  "pump_input_mode": "tdh",
  "tail_head_m": 120,
  "event": "valve_closure",
  "valve_position_m": 8000,
  "valve_curve": "butterfly",
  "event_duration_s": 8,
  "event_law": "smooth",
  "closure_time_factor": 1.25,
  "auto_closure_time": false,
  "simulation_time_s": 60,
  "use_dvcm": true,
  "protection_type": "none",
  "protection_position_m": 8000,
  "air_valves": "",
  "air_valve_discharge_coefficient": 0.7,
  "compare_with_baseline": true,
  "language": "es",
  "unit_system": "metric"
}