Opening pressure definition

Opening pressure means the pressure referred to in a list of substances at which the high velocity vent valves open. For pressure tanks the opening pressure of the safety valve shall be established in accordance with the requirements of the competent authority or a recognized classification society;
Opening pressure kPa3 or characteristic diagram:2, 3
Opening pressure kPa3 or characteristic diagram2, 3: 3.1.2.4. Governor 3.1.3. Cold start system