{
  "_comment": "Esempio input VDI 2230 — Giunzione flangia flangia, M12 10.9, DSV, carico alternato",
  "_units": "Forze in N, lunghezze in mm, pressioni in N/mm², temperature in K",

  "size": "M12",
  "strength_class": "10.9",
  "thread_type": "coarse",
  "joint_type": "DSV",

  "lK_mm": 40,
  "DA_mm": 36,
  "dh_mm": 13.5,
  "DA_prime_mm": 60,
  "hmin_mm": 20,

  "ssym_mm": 0,
  "a_mm": 0,
  "n_factor": 1.0,
  "IBers_mm4": 0,

  "FA_max_N": 20000,
  "FA_min_N": 5000,
  "FQ_max_N": 0,
  "MY_max_Nmm": 0,

  "mu_G": 0.12,
  "mu_K": 0.12,
  "mu_T": 0.12,
  "qF": 1,
  "qM": 1,
  "ra_mm": 0,

  "pi_max_N_mm2": 0,
  "AD_mm2": 0,
  "IBT_mm4": 0,
  "u_mm": 0,
  "MB_max_Nmm": 0,

  "alpha_A": 1.7,

  "EP_N_mm2": 210000,
  "pG_N_mm2": 900,

  "fZ_total_um": 12,
  "alpha_S": 1.15e-5,
  "alpha_P": 1.15e-5,
  "dT_S_K": 0,
  "dT_P_K": 0,

  "meff_actual_mm": 20,
  "internal_material": "steel",
  "thread_treatment": "SV",

  "lGew_mm": 5
}