Using piston–die press tests for preliminary sizing and selection of a high-pressure grinding roll

CIM Journal ◽  
2019 ◽  
Vol 10 (3) ◽  
pp. 143-156
Author(s):  
F. Wang ◽  
B. Klein ◽  
P. Rosario
Keyword(s):  
High Pressure ◽  
High Pressure Grinding Roll ◽  
Selection Of

scholarly journals Study on the Phase Selection and Debye Temperature of Hyper-Peritectic Al-Ni Alloy under High Pressure

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 84
Author(s):  
Xiaohong Wang ◽  
Zhipeng Chen ◽  
Duo Dong ◽  
Dongdong Zhu ◽  
Hongwei Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Ambient Pressure ◽  
Competitive Growth ◽  
Phase Selection ◽  
Debye Temperatures ◽  
Ni Alloy ◽  
Temperature Heat ◽  
Low Temperature Heat Capacity ◽  
New Phase ◽  
Selection Of

The phase selection of hyper-peritectic Al-47wt.%Ni alloy solidified under different pressures was investigated. The results show that Al3Ni2 and Al3Ni phases coexist at ambient pressure, while another new phase α-Al exists simultaneously when solidified at high pressure. Based on the competitive growth theory of dendrite, a kinetic stabilization of metastable peritectic phases with respect to stable ones is predicted for different solidification pressures. It demonstrates that Al3Ni2 phase nucleates and grows directly from the undercooled liquid. Meanwhile, the Debye temperatures of Al-47wt.%Ni alloy that fabricated at different pressures were also calculated using the low temperature heat capacity curve.

High Pressure Liquid Chromatography of Ester and Salt Formulations of 2-Methyl-4-Chlorophenoxyacetic Acid

1979 ◽  
Vol 62 (4) ◽  
pp. 738-741
Author(s):  
Timothy Stevens ◽  
Robert B Grorud
Keyword(s):  
High Pressure ◽  
Liquid Chromatography ◽  
Collaborative Study ◽  
Internal Standard ◽  
Hplc Method ◽  
Hplc Assay ◽  
High Pressure Liquid Chromatographic ◽  
Chlorophenoxyacetic Acid ◽  
Liquid Chromatographic ◽  
Selection Of

Abstract A high pressure liquid chromatographic (HPLC) assay of amine salt and ester formulations of MCPA has been collaboratively studied. The AOAC 2,4-D HPLC method has been modified for application to MCPA products. The MCPA methodology is identical to that of 2,4-D except in strength of mobile solvent, pH of mobile solvent, heating of ester formulations to 50°C to ensure complete saponification, and the use of glass microfiber filters. The method is specific and separates all known impurities. Examination of chromatograms and percentage results from 8 collaborators indicate that selection of a practical internal standard would improve precision in the procedure and a second collaborative study is recommended.

Study of an Atmospheric Freeze Drying Refrigeration System

2013 ◽  
Vol 860-863 ◽  
pp. 1674-1678
Author(s):  
Peng Xia ◽  
Kun Tian ◽  
Xiao Lu Ma ◽  
Le Ren Tao ◽  
Ying Ling Cai
Keyword(s):  
High Pressure ◽  
Water Vapor ◽  
Fluidized Bed ◽  
Freeze Drying ◽  
Pressure Ratio ◽  
Outer Wall ◽  
Input Power ◽  
Refrigeration Cycle ◽  
Refrigeration System ◽  
Selection Of

High-pressure air compressed by air compressor, is isobarically cooled and adiabatically expanded and is turned to low temperature air, which enters the adsorbent fluidized bed to freeze the materials. After the freezing of the materials, adsorbent will adsorb water vapor, which can play the effect of atmospheric freeze drying. The recovery power of the expander can be used as input power of the subsidiary refrigeration cycle. In order to adjust the temperature of the fluidized bed, evaporator coils of the affiliated refrigeration system are directly wound on the outer wall of the fluidized bed. This paper studies the combined refrigeration system, and analyzes the influence of different refrigerant pressure ratio, fluidized bed outlet air temperature, and refrigerant selection of subsidiary refrigeration cycle on the performance of the system.

Design Methodology for Axial Force Response of Pipe-in-Pipe: A Probabilistic Approach

2011 ◽  
Author(s):  
Olav Fyrileiv ◽  
Mark Marley ◽  
Sune Pettersen
Keyword(s):  
High Pressure ◽  
Axial Force ◽  
Probabilistic Approach ◽  
Design Approach ◽  
Electrical Heating ◽  
Buried Pipe ◽  
Worst Case ◽  
Operational Conditions ◽  
Offshore Development ◽  
Selection Of

As the easy oil is more or less gone, the typical offshore development faces several challenges in the future. These may be related to ultra deep water or difficult operational conditions like high pressure and temperatures. In addition there are often challenges related to flow, for example wax or hydrates during shut-downs or in tail production. Prevention of wax and hydrates is often solved by injection of chemicals or alternatively by some sort of heating, e.g. direct electrical heating. It may also to some degree be solved by superior thermal insulation or a combination of the methods mentioned. A thick insulation coating may give additional challenges with respect to submerged weight. Pipe-in-pipe (PIP) designs, where the flowline is insulated and covered by an outer pipe, solve this challenge and are becoming more and more popular. However, the pipe-in-pipe concepts also provide some specific challenges. DNV has recently been involved in a PIP project with quite challenging operational conditions. The combination of high temperature and high pressure (HTHP) and a corrosive well fluid with a buried pipe-in-pipe without any release of axial force leads to a very conservative design using conventional design approach. This challenge can be solved by applying a stochastic design approach avoiding conservative assumptions on top of each other. A probabilistic analysis targeting an acceptable probability of failure according to DNV-OS-F101 [1] resulted in an optimised design with a balanced selection of input parameters and avoiding ultra-conservative, worst case input combinations.

scholarly journals Erratum to: Selection of Process Conditions for High Pressure Pasteurization of Sea Buckthorn Juice Retaining High Antioxidant Activity

2014 ◽  
Vol 7 (11) ◽  
pp. 3235-3235
Author(s):  
Zacharias Alexandrakis ◽  
Konstantina Kyriakopoulou ◽  
George Katsaros ◽  
Magdalini Krokida ◽  
Petros Taoukis
Keyword(s):  
Antioxidant Activity ◽  
High Pressure ◽  
Sea Buckthorn ◽  
Process Conditions ◽  
High Antioxidant Activity ◽  
Selection Of

Development of Design Criteria for a High Pressure Vessel Construction Code

1987 ◽  
Vol 109 (2) ◽  
pp. 256-259 ◽  
Author(s):  
G. J. Mraz
Keyword(s):  
High Pressure ◽  
Pressure Vessel ◽  
High Strength Steels ◽  
High Strength ◽  
Design Criteria ◽  
Construction Methods ◽  
Shrink Fitting ◽  
Section Viii ◽  
Pressure Stress ◽  
Selection Of

Out of concern for public safety, most legal jurisdictions now require unfired pressure vessel construction to comply with the ASME Boiler and Pressure Vessel Code. Because the present two divisions of Section VIII of that Code are not well suited for high pressure design, a new division is needed [1]. The currently anticipated main design criteria of the proposed division are full plastic flow or full overstrain pressure, stress intensity in the bore, fatigue, and fracture mechanics. The rules are expected to allow better utilization of high strength steels already included in the present Section VIII. At the same time materials of even higher strength are introduced. The benefits of compressive prestress are recognized. Construction methods allowing it’s achievement, such as autofrettage, shrink fitting and wire winding are included. Reasons for selection of the criteria are given.

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