A review of conventional and optical measurement methods of ultra high pressure vessels (UHPVs) in-service was introduced. Typical engineering applications of these technologies were illustrated. The new trends of inspection methods of UHPVs were discussed. Owe to full-field, non-destructive imaging characteristics with high precision and sensitivity, optical measurement methods had gained more and more attention in recent years. Therefore, DIC was suggested to be developed for experimental inspection of UHPVs in 2D or 3D surface shape and deformations.

An Ultrahigh pressure extraction technique (UPET) is presented for the extraction of protein components from sika deer pilose antler. Various experimental conditions of the UPET process, such as extraction pressure (50-300 MPa), extraction time (0-10 min) and liquid/solid ratio (2-10 mL•g−1), were investigated to optimize the extraction process. The content of protein components in pilose antler extract by UPET for 4 min was higher than those using ultrasonic extraction (UE) for 30 min, heat reflux extraction (RE) for 12 h and soaking extraction (SE) at room temperature for 24 h respectively. From the viewpoints of extraction time, the proteins content in pilose antler extract and energy consumption in the extraction process, UPET was more effective than the conventional extraction methods studied.

Due to the characters of the ultra high pressure vessel employed in food processing, a seal structure was introduced in this study. Then numerical analysis was performed using the larger finite element stress analysis software ansys12.0 for the stresses of the seal structure under internal pressure. In order to solve the contact question of delta-ring seal structure by using face-face contact model, a 3-D axisymmetric solid element was employed to calculate the stresses of the connected location among delta-ring, blind cover and end cylinder, the mises stresses in this structure were analyzed. Thus, the distribution nephograms of the stress on the contact surface were obtained in different conditions. Full-field plastic deformation of seal structure was generated when the inner pressure was larger than 300Mpa. At last, the reason for residual deformation was analyzed.