def L_equiv_from_K(K, fd=0.015):
    """Calculates equivalent length of pipe (L/D), for a given loss 
    coefficient.

    .. math::
        \\frac{L}{D} = \\frac{K}{f_d}

    Parameters
    ----------
    K : float
        Loss coefficient, [-]
    fd : float, optional
        Darcy friction factor, [-]

    Returns
    -------
    L_D : float
        Length over diameter, [-]

    Notes
    -----
    Assumes a default friction factor for fully turbulent flow in steel pipes.

    Examples
    --------
    >>> L_equiv_from_K(3.6)
    240.00000000000003
    """
    return K / fd
