Metal cylinder

The criterion retained up to now in the specifications is not the true vapor pressure, but an associated value called the Reid vapor pressure, RVP. The procedure is to measure the relative pressure developed by the vapors from a sample of motor fuel put in a metallic cylinder at a temperature of 37.8°C. The variations characteristic of the standard method are around 15 millibar in repeatability and 25 millibar in reproducibility. 

A metal cylinder A contains two small holes. Into one of these the thermometer is placed and into the other (arranged centrally) is placed the melting-point tube. The cylinder is pierced by a hori-2ontaI tunnel so the melting-point tube can be observed during heating. A lens is... 

Indirect. steam-tube dryer This is a bare metal cylinder provided with one or more rows of metal tubes installed longitudinally in the shell. It is suitable for operation up to available steam temperatures or in processes requiring water cooling of the tubes. 

Chemical Reactivity - Reactivity with Water Reacts with water to form hydrogen fluoride, oxygen and oxygen difluoride Reactivity with Common Materials Reacts violently with all combustible materials, except the metal cylinders in which it is shipped Stability During Transport Stable Neutralizing Agents for Acids and Caustics Not pertinent Polymerization Not pertinent Inhibitor of Polymerization Not pertinent. 

Fig. 29) IS, hoA-ever, inuch more convenient for obtaining constant temperatures up to 600". It consists of three concentiic metal cylinders, the outer one being coated with non-conducting mateiial. They aie so aiiangcd that the heated an fiom a... 

It decomps slowly when stored in metal cylinders (Ref 5). Its expl props have not been examined... 

A fairly recent method of measuring expl energy (power in our convention) depends on accurate determination of the expansion of an explosively-driven metal cylinder (Refs 7 8) Table 3... 

Available expin energy is then correlated with the kinetic energy of the metal cylinder. In Table 3 we see that relative cylinder expansion energies (from Ref 7) correlate fairly well with relative heats of detonation if the latter are taken on a per unit volume basis... 

An instrument to measure the specific gravity (SG) of fluids. Typically a small, calibrated, and bottom-weighted glass or metal cylinder that floats to a level indicating the SG. 

The toasting step is now frequently carried out by passing the branches through a perforated rotating metal cylinder in an inclined position over an open fire. The cylinders used are about 2 to 2.5 m in diameter and 4 m in length. Dwell time is very short. The process is called sepecadora . 

Heated two roll mills consist of two large metal cylinders mounted closely in parallel, which rotate toward one another, creating a narrow gap between the two rolls. A diagram of a two roll mill can be seen in Fig. 22.7. To heat the surfaces of the rolls, steam, hot water, or oil circulates through the rolls. Preblended material is dropped into the nip in small quantities. 

Of other tests which are sometimes applied to high explosives, mention should be made of the tests for brisance. Brisance is an ill-defined word, best described by saying that an explosive of high brisance, when fired unconfined on a steel plate, will bend or shatter that plate more effectively than an explosive of low brisance. The Hess and Kast tests for brisance depend on this property, using the deformation of a metal cylinder by the explosive as a measure of the property. In most countries these tests are now little used. 

In heat-flow calorimeters, it is particularly important, as already indicated in Section II, that the heat sink remain, throughout the experiment, at a constant temperature. The construction of the heat sink and thermostat in the Calvet apparatus is shown in Fig. 3. The calorimetric element fits into a conical socket (A), cut in a cylindrical block of aluminium (B). The block is positioned between the bases of two truncated cones (C and C ), placed within a thick metal cylinder (D). The metal cylinder is, in... 

Fig. 3. Vertical section of the Calvet microcalorimeter (16) microcalorimetric element (A) the metal block (B) metallic cones (C and C ) thick metal cylinder (D) thermostat consisting of several metal canisters (E) electrical heater (F) switch (G) thermal insulation (I) and thermal lenses (J and J ). Reprinted from Calvet and Prat (S3) with permission of Dunod.

The solid metal cylinder or plunger which is moved by liquid pressure, air pressure or a combination of both, in such machinery as moulding presses, bale splitters, internal mixer floating rams and bottom doors, etc. 

Figure 9.2 A schematic diagram of a Calvet s calorimeter, adapted from [157], Only one of the twin calorimetric units (A), with its thermopiles (T) is shown. These units fit into high-conductivity metal blocks (B). Care cones for equipartition of thermal fluctuations D is a thick metal cylinder surrounded by a series of canisters (E). H is an electric heater, and the outer cylinder (I) is a thermal insulator.

Neat tripropylaluminum of 96% purity was supplied in a metal cylinder from Toyo Stauffer Chemical Company, Ltd. (Japan). This reagent is contaminated by 1.2% of triethylaluminura, 2.2% of triisobutylaluminum, and other compounds. Neat tripropylaluminum is also available from Aldrich Chemical Company, Inc. Since neat tripropylaluminum is pyrophoric and reacts violently with oxygen and water, the syringe should be washed with hexane immediately after addition. 

Fig. 12.4. Single-tube STM. The tube piezo scanner is adhered inside a sturdy metal cylinder, which sits on three screws on the base plate. The two front screws make the coarse approaching. The rear screw makes fine approaching by using the two front screws as the pivot axis. The rear screw is actuated by a stepping motor for automatic approaching. The preamplifier (not shown) is mounted directly on top of the metal cylinder to eliminate the microphone effect of the coaxial cable between the tip and the input of the preamplifier. The entire unit is rigid enough that a mediocre vibration isolation device can provide atomic resolution. (After Hansma et al., 1988.)...

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