Indicators of pressure

Liquids can also exert pressure due to thermal expansion. Table 4.15 provides an indication of pressure increases due to temperature increases for selected common liquids in full containers or pipes. Serious accidents can arise unless the design of rigid plant items such as pipework takes into account the changes in volume of liquids with temperature fluctuation by the following or combinations thereof ... 

At the P-CAC head seven different inlet ports can be used to supply the column with the feed and with different eluent solutions, while the ORNL units were equipped with only four ports. One inlet port at the P-CAC is reserved for the indication of pressure and one for the pressure relief valve. Another inlet port is designed as an inlet for the main eluent, which floods the entire annulus. 

Shirotanil, Inagaki Y, Utsumi W, Yagi T (1991) Pressure-sensitive absorption spectra of thin films of bis(diphenylglyoximato)platinum(II), Pt(dpg)2 potential application as an indicator of pressure. J Mater Chem 1 1041-1043... 

This change in resistance is used as the variable resistance in a bridge circuit that provides an electrical signal for indication of pressure. 

There might, however, be pressure communication within the He Formation between hydraulic compartments I and II either due to cross-fault Ile/Ile communication, or due to communication downflank in the water zone at around 3900 m MSL around the tip of the fault separating these two compartments. For the Tilje Formation, however, there is no indication of pressure communication between hydraulic compartments I and II, i.e., no cross-fault communication and no downflank communication (possibly due to sub-seismic reservoir discontinuities and deteriorated reservoir quality). 

Pressure gauges are situated in line and on the storage tank for visual indications of pressure in the system. 

A warning system should be induded to indicate failure in the air supply. An indicator of pressure difference should... 

Another concern is the potential of deregulation to create challenges to the maintenance of an effective corporate safety culture. In the aviation and rail industries, corporate culture problems affected safety in the aftermath of mergers and acquisitions, and also at some of the new entrant airlines established after deregulation. In the years after deregulation, there were also indications of pressure to under-report some types of safety problems in the railroad industry, and evidence of maintenance violations at several major airlines. In the U.K. nuclear power industry, corporate culture concerns dealt with the excessive use of contractors and the loss of corporate expertise and institutional memory. 

The pressure temperature phase diagram of Se with indication of pressure-temperature points of viscosity measurements is presented in Fig. 1. The obtained results on viscosity are presented in Fig. 2. It was found that the viscosity of liquid Se strongly decreases with pressure along the melting curve, reaching the value... 

For the experimental investigation of compressibility of superheated and saturated vapors, the method of the constant-volume nonballasted piezometer was employed. The fundamental variables (pressure, temperature, and mass of the substance) were measured with instruments of the same class as those used in the work of MEI. The distinguishing feature of the piezometric rig was the use of a membrane zero indicator of pressure of the electrocontact type. The sensitivity of this instrument reached 1 mm water column, but the zero point drifted by 10 mm water column. The authors in Refs. [2.19, 2.21] evaluated the scatter of experimental points on the saturation curve as 0.4% for pressure, and the repeatability of presssure during the forward and reverse tracing along the constant-volume lines was 0.15%. 

The main purpose of the work by Lange and Stein [4.26] was the investigation of thermal properties of gaseous mixtures of Freon-23. For pure Freon-23 a small number of points were obtained (Table 41). The measurements were carried out with the Burnett method (the so-called classical version) using a membrane zero indicator of pressure having a sensitivity of 0.7 mbar. The investigated Freon-23 was 99.98% pure. 

Flow Summary shows the values of fC-pipe and fC-fittings. These are the indications of pressure drop contribution by the pipe and fittings. In the Pressure Drop frame, there are a few pressure drop calculations, which include the contribution of static pressure drop (elevation loss or gain), velocity head (change in velocity due to reducer or expander), and control valve. The result also shows the frictional pressure drop per 100 m. This is sometimes very useful, because most operating companies establish some basic value of pressure drop per 100 m. 

Haber, F., and R. Le Rossignol. 1907. Zur Lage des Ammoniakgleichgewichts. Zeitschrift fiir Elektrochemie 14 513—514. The following table shows percentages of NH3 at equilibrium at different temperatures and pressures (I retain the indication of pressures in atmosphere as in the original paper 1 atm = 101.3 kPa) ... 

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