Pressurfect™ CNG-Advanced Material Grade for High Pressure CNG Fuel Line Applications

2017 ◽  
Author(s):  
Vikram Pandit
Keyword(s):  
High Pressure ◽  
High Pressures ◽  
Extensive Study ◽  
Stainless Steel 316L ◽  
Gas Stations ◽  
Production Route ◽  
Pressure Line ◽  
The People ◽  
The Government ◽  
Very High

In line with the government of India’s philosophy of going green to reduce emission levels in cities there is a thrust to increase the gas distribution network. With an increase in CNG vehicles, comes the safety of the people and we need to ensure that Safety is not comprised at any level. To follow the Safety aspect, CNG is an excellent alternate fuel which can be used to minimize risks and increase life of the vehicles. Since this gas is used at very high pressures (in the range of 230–250 bar) and under severe conditions, special tubing must be used for the transportation to gas stations and in the vehicles. Therefore, the tubing should be able to not only withstand high pressure of the gas within but also the corrosion issues arising due to the extreme conditions the tubes within. Sandvik did an extensive study of the conditions and came up with a material which is specifically developed for this high pressure application. The high pressure line is of Stainless Steel 316L but this material comes with certain modifications for this particular requirement. In this tubing the C content is lowered to 0.025% for better corrosion resistance, Ni is min 13% along with Mo min 2.5% this makes sure that the material not only has sufficient passivation properties but the strength also to withstand that kind of a pressure. Alongside a special production route also has been developed for the manufacturing of these tubing. This ensures Safety for the people throughout the life of the vehicle.

scholarly journals Gaseous combustion at high pressures. —Part X. The co-volume corrections, maximum temperatures and dissociation of steam and carbon dioxide in explosions

1928 ◽  
Vol 119 (782) ◽  
pp. 464-480
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Internal Energy ◽  
High Temperatures ◽  
High Pressures ◽  
Internal Combustion ◽  
Systematic Survey ◽  
Explosion Method ◽  
Maximum Temperatures ◽  
Very High

During the researches upon high-pressure explosions of carbonic oxide-air, hydrogen-air, etc., mixtures, which have been described in the previous papers of this series, a mass of data has been accumulated relating to the influence of density and temperature upon the internal energy of gases and the dissociation of steam and carbon dioxide. Some time ago, at Prof. Bone’s request, the author undertook a systematic survey of the data in question, and the present paper summarises some of the principal results thereof, which it is hoped will throw light upon problems interesting alike to chemists, physicists and internal-combustion engineers. The explosion method affords the only means known at present of determining the internal energies of gases at very high temperatures, and it has been used for this purpose for upwards of 50 years. Although by no means without difficulties, arising from uncertainties of some of the assumptions upon which it is based, yet, for want of a better, its results have been generally accepted as being at least provisionally valuable. Amongst the more recent investigations which have attracted attention in this connection should be mentioned those of Pier, Bjerrum, Siegel and Fenning, all of whom worked at low or medium pressures.

scholarly journals Ultra High Pressure Liquid Chromatography for Crude Plant Extract Profiling

2011 ◽  
Vol 94 (1) ◽  
pp. 51-70 ◽  
Author(s):  
Philippe J Eugster ◽  
Davy Guillarme ◽  
Serge Rudaz ◽  
Jean-Luc Veuthey ◽  
Pierre-Alain Carrupt ◽  
...  
Keyword(s):  
High Pressure ◽  
Liquid Chromatography ◽  
High Pressure Liquid Chromatography ◽  
High Pressures ◽  
Product Analysis ◽  
Basic Principles ◽  
Ultra High Pressure ◽  
Crude Plant Extract ◽  
Phase Chemistry ◽  
Very High

Abstract Ultra high pressure liquid chromatography (UHPLC) systems operating at very high pressures and using sub-2 μm packing columns have allowed a remarkable decrease in analysis time and increase in peak capacity, sensitivity, and reproducibility compared to conventional HPLC. This technology has rapidly been widely accepted by the analytical community and is being gradually applied to various fields of plant analysis such as QC, profiling and fingerprinting, dereplication, and metabolomics. For many applications, an important improvement of the overall performances has been reported. In this review, the basic principles of UHPLC are summarized, and practical information on the type of columns used and phase chemistry available is provided. An overview of the latest applications to natural product analysis in complex mixtures is given, and the potential and limitations as well as some new trends in the development of UHPLC are discussed.

scholarly journals First-principles study of SnO under high pressure

2016 ◽  
Vol 30 (31) ◽  
pp. 1650228 ◽  
Author(s):  
M. A. Ali ◽  
A. K. M. A. Islam ◽  
N. Jahan ◽  
S. Karimunnesa
Keyword(s):  
High Pressure ◽  
Optical Properties ◽  
First Principles ◽  
High Pressures ◽  
Mechanical Stability ◽  
Generalized Gradient ◽  
First Principles Study ◽  
Anisotropic Factor ◽  
High Anisotropy ◽  
Very High

This paper reports the first-principles study of SnO under high pressure within the generalized gradient approximation (GGA). We have calculated the structural, elastic, electronic and optical properties of SnO. The elastic properties such as the elastic constants [Formula: see text], bulk modulus, shear modulus, Young’s modulus, anisotropic factor, Pugh’s ratio and Poisson’s ratio are calculated and analyzed. Mechanical stability of SnO at all pressures is confirmed using the Born’s stability conditions in terms of [Formula: see text]. It is also found that SnO exhibits very high anisotropy. The energy band structure and density of states are also calculated and analyzed. The results show the semiconducting and metallic properties at zero and high pressures, respectively. Furthermore, the optical properties are also calculated. All the results are compared with those of SnO where available but most of the results at high pressure are not compared due to the unavailability of results.

scholarly journals BUDAYA KONSUMSI MINUMAN BERALKOHOL (STUDI KASUS PADA MASYARAKAT MOSKONA DI KELURAHAN BINTUNI BARAT, DISTRIK BINTUNI BARAT, KABUPATEN TELUK BINTUNI)

2020 ◽  
Vol 9 (2) ◽  
pp. 147-153
Author(s):  
Frans Yerkohok ◽  
Sanggar Kanto ◽  
Anif Fatma Chawa
Keyword(s):  
Alcohol Consumption ◽  
Deviant Behavior ◽  
Alcoholic Beverages ◽  
Religious Leaders ◽  
Study Approach ◽  
The People ◽  
Alcoholic Drinks ◽  
The Government ◽  
Very High

Abstrack. This article is a socio-cultural study of the culture of consuming liquor. This research was conducted using a qualitative method with a case study approach to the Moskona community in West Bintuni Village, West Bintuni District, Bintuni Bay Regency. Using Herbert Blumer's theory of symbolic interactionism, this study seeks to understand the meaning of alcohol consumption for the people of Moscow and the economic, social, and health impacts of the culture of consuming alcoholic beverages. The results of this study reveal that the consumption of alcoholic drinks does come from outside and has developed into a habit in society, and people perceive alcoholic drinks as a form of brotherhood and kinship between groups of people when sitting together. Various efforts have been made by elements of society such as traditional leaders, religious leaders, and the government, such as very high customary fines for people who commit deviant behavior after consuming liquor, but in reality, the rate of accidents and fights after consuming alcoholic beverages is still high. This study also shows that the persistence of alcohol consumption in the community is related to family, economic and social factors.Keyword : Indigenous people, Liquor, Teluk BintuniAbstrak. Penelitian ini bertujuan untuk mengetahui bagaimana perkembangan komsumsi minuman beralkohol pada masyarakat Moskona yang berada di Kelurahan Bintuni Barat, Distrik Bintuni, Kabupaten Teluk Bintuni, sehingga menjadi sebuah budaya. Sselain itu juga untuk memahami makna konsumsi minuman beralkohol bagi masyarakat Moskona serta dampak ekonomi, sosial dan budaya dari konsumsi minuman beralkohol, dengan menggunakan Teori Interaksionisme Simbolik dari Herbert Blumer. Hasil penelitian mengungkapkan bahwa konsumsi minuman beralkohol memang datang dari luar dan berkembang menjadi sebuah kebiasaan pada masyarakat, dan masyarakat memaknai minuman beralkohol sebagai bentuk persaudaraan dan kekerabatan di antara kelompok masyarakat saat duduk bersama. Berbagai upaya yang dilakukan oleh elemen masyarakat seperti tokoh adat, tokoh agama, dan pemerintah sudah dilakukan seperti denda adat yang sangat tinggi kepada masyarakat yang melakukan perilaku menyimpang pasca mengkonsumsi minuman beralkohol, namun dalam kenyataannya tingkat kecelakaan dan perkelahian pasca konsumsi minuman beralkohol masih tetap tinggi. Bertahannya kebiasaan konsumsi minuman beralkohol pada masyarakat ada kaitannya dengan faktor keluarga, individu pelaku konsumsi dan maraknya minuman beralkohol yang beredar luas di tengah masyarakat, oleh karena itu upaya yang diharapkan oleh peneliti adalah pemerintah mengambil sikap tegas dengan mengeluarkan Peraturan Daerah (PERDA) terkait minuman beralhokol, untuk mampu meredam berdar luasnya minuman beralkohol tersebut.Kata Kunci : Minuman beralkohol, Peraturan Daerah, Teluk Bintuni

The influence of mean contact pressure on the friction coefficient of a traction fluid at high pressure

2000 ◽  
Vol 214 (2) ◽  
pp. 309-312 ◽  
Author(s):  
M F Workel ◽  
D Dowson ◽  
P Ehret ◽  
C M Taylor
Keyword(s):  
High Pressure ◽  
Friction Coefficient ◽  
Contact Pressure ◽  
High Pressures ◽  
Friction Coefficients ◽  
Ball Impact ◽  
Good Consistency ◽  
Traction Fluid ◽  
Very High

A new ball impact apparatus has been developed for measuring the friction coefficients of solidified lubricants under very high pressures. Results obtained for Santotrac 50 showed a decrease in friction coefficient with increasing mean contact pressure and showed good consistency with values reported elsewhere from several different forms of apparatus.

scholarly journals Effect of lockdown due to COVID-19 pandemic on mental health of pre-medical students of Maharashtra

2020 ◽  
Vol 7 (9) ◽  
pp. 3524
Author(s):  
Moksh S. Khetan ◽  
Lohit S. Vaishnao ◽  
Mahek Kewalramani
Keyword(s):  
Medical Students ◽  
Psychological Health ◽  
Online Survey ◽  
Maximum Stress ◽  
Age Group ◽  
The People ◽  
Prevalence Of Depression ◽  
The Government ◽  
The Relationship ◽  
Very High

Background: The worldwide rapid increase of infected cases of COVID-19 has created a sense of uncertainty and anxiety about what is going to happen. The Government of India ordered the complete lockdown in nation. As a result the pre-medical exam has been postponed with no definite date. It has also lead to unfavourable effects on the learning and psychological health of students.Aim: To evaluate and analyse the prevalence of Depression, Anxiety and Stress among pre-medical students of Maharashtra using DASS-21.Methods: It was an online survey which was conducted using Google Forms with link sent using WhatsApp. A standard DASS-21 questionnaire was used for the study. The survey questionnaire would take around 3-4 min to complete. Total 324 responses were received by the stipulated time.Results: The study showed that the people of age group less than 20 years were more depressed in this lockdown crisis as compared to those of age above 20 years. In the present study, 44 respondents of age less than 20 years had very high levels of anxiety while in the age group of above 20 there were 25 such respondents. The relationship between anxiety level and age was statistically significant. When compared on the stress scale it was found that females of age less than 20 years were under maximum stress. Conclusion: Index survey suggested that the pandemic affected the preparation of the respondents to a great extent and affected their mental status negatively.

Seismic parameter φ: Computation at very high pressure from laboratory data

1966 ◽  
Vol 56 (3) ◽  
pp. 725-731
Author(s):  
Orson L. Anderson
Keyword(s):  
High Pressure ◽  
Bulk Modulus ◽  
Ultrasonic Velocity ◽  
Pressure Range ◽  
High Pressures ◽  
Equations Of State ◽  
Laboratory Data ◽  
Second Derivative ◽  
Velocity Measurements ◽  
Very High

abstract By using the accuracy inherent in ultrasonic velocity measurements taken at pressures less than 10 kb, the seismic parameter φ=vp2−(43)vS2 can be computed at very high pressures. The equation used requires the assumption that the second derivative with respect to pressure of the bulk modulus be negligible at all pressures considered. This assumption is checked by computing the compression (V/V0) in the pressure range by equations of state using the assumption, and comparing the resulting values with measured compression. Illustrations are given for MgO and Al2O3.

The Possible Importance of Pressure in Metastable Precipitate Formation in Ion Implanted Metals

1988 ◽  
Vol 100 ◽  
Author(s):  
John H. Evans
Keyword(s):  
High Pressure ◽  
High Pressures ◽  
Solid Phase ◽  
Inert Gas ◽  
Fine Scale ◽  
Host Matrix ◽  
Driven Cavity ◽  
Precipitate Formation ◽  
Very High ◽  
Metastable Precipitate

ABSTRACTPrompted by the recent discovery that the heavier inert gas atoms implanted into metals precipitate in the solid phase, indicative of very high pressures (,>,1 GPa), the present paper discusses the conditions under which such pressures might be expected. The metal/inert gas results are briefly described and then used as a model to show that the two essential features apart from low or moderate metal temperatures, are the insolubility of the implanted species in the host matrix and its precipitation on a very fine scale. This combination suppresses the bias-driven cavity swelling that would otherwise control vacancy acquisition in an irradiation environment.The extrapolation to other combinations of implanted ion and metal will be discussed. Where the implanted ion is insoluble and precipitates on a scale similar to the inert gas atoms, exact analogy suggests that the precipitates will again be under high pressure. The formation of high pressure phases might not be unexpected and could be a factor in explaining the presence of phases previously thought to be metastable.

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