Auxiliary connections

For nonflammable and nonhazardous liquids, auxiliary connections to the pressure casing may be threaded. 

For flammable or hazardous liquids, auxiliary connections to the pressure casing shall be socket welded, butt welded, or integrally flanged. Field connections shall terminate in a flange. 

Pressure containing casings made of wrought materials or combinations of wrought and cast materials shall conform to the conditions specified in 2.11.3.4.1 through 2.11.3.4.4. These requirements do not apply to casing nozzles and auxiliary connections (see 2.3.2 and 2.3.3). 

Enantiomerically pure 4,5-dihydroisoxazoles are prepared by controlling the stereochemistry of the cycloaddition by chiral auxiliaries connected either to the alkene31 33,37 41 or to the nitrile oxide22 26,4 2 4 3 components (see Section D. 1.6.1.2.1.). 

Auxiliary Connection Boss(es). The suction and discharge nozzles shaU have boss(es) for gage connections. Boss size shaU accommodate in. NPT min., 2 in. NPT preferred. Boss(es) shaU be driUed and tapped when specified by customer. 

Zero/minimum drift of set points, built-in auxiliary connections for data transfer... 

A variety of new chiral auxiliaries 218 have been synthesized from l,4 3,6-dianhydro-D-glucitol and the enolate derived from 219 (with the auxiliary connected to the enolate precursor via an amide linkage) undergoes methylation (to give the (R)-isomer) in 83 %d.e. ... 

There are two approaches connnonly used to derive an analytical connection between g(i-) and u(r) the Percus-Yevick (PY) equation and the hypemetted chain (FfNC) equation. Both are derived from attempts to fomi fimctional Taylor expansions of different correlation fimctions. These auxiliary correlation functions include ... 

Through the tap-offs of the bus, the unit auxiliary transformers (UATs) are connected to feed the station auxiliary services. For more clarity we have taken out the portion of the tap-offs from Figure 13.21 and redrawn it in Figure 13.18 to illustrate the above system and its interconnections. The tap-offs are now subject to the cumulative inOuence of the two supply sources. In the event of a fault on this section, both the sources would feed the same and the fault current through the tap-offs would add up. The tap-offs should thus be designed for the cumulative effect of both fault levels. For the sake of an easy reference, Table 13.8 suggests a few typical values of fault currents, worked out on the basis of data considered for the G and GT. One such example is also worked out in Example 13.3. 

Test This is the position of the trolley when the power contacts are isolated but the control circuit is still connected, because it is tapped directly from Ihe auxiliary bus. This condition is essential to facilitate testing of control circuits with functional interlocks, without energizing the connected lotid. Isolation This is the position of the trolley when the power and the control circuits are both isolated. Depending upon the site requirements, sometimes the control circuit may be required to be still energized for some test requirements. 

Rated primary voltage The normal practice for an HT system is to provide a separate LT feeder for the auxiliary supplies. The primary voltage will be the normal system voltage, V, when the transformer is connected line to line or V,/ l3 when connected line to neutral. 

The total VA level of a control or an auxiliary circuit is the phasor sum of the VA burdens of each individual component and device connected in the circuit, and... 

These are auxiliary CTs, and are sometimes necessary to alter the value of the secondary of the main CTs. They help to reduce the saturation level and hence the overloading of the main CTs, particularly during an overload or a fault condition. They are used especially where the instruments to which they are connected are sensitive to overloads. They have to be of wound primary type. So that the main CTs are not overburdened they have a VA load that is as low as possible. Figure 15.20 illustrates the application of such CTs and their selection is made on the following basis ... 

The standards define terms used in the industry and describe the basic design of the unit. It deals with the casing, rotors and shafts, wheels and blades, combustors, seals, bearings, critical speeds, pipe connections and auxiliary piping, mounting plates, weather-proofing, and acoustical treatment. 

The balance chamber leakoff line, while recommended to be held within the confines of the compressor casing may well turn out to require some user piping. There are some situations where the desire for keeping open space around the compressor for maintenance may require compromise on the part of the user. The balance of the connections on the axial are for lube oil and other auxiliary equipment not different from that found on other compressors. 

Single phase motors do exhibit operational problems in pony motor applications. The capacitors in these motors store energy and the motors resist external attempts to rotate them. Single phase motors can be made to work on pony motor applications by splicing into the capacitor circuit and connecting it in series with an open auxiliary switch in the active motor starter. 

Can several process steps be carried out in separate processing vessels rather than a single multipurpose vessel This reduces complexity and the number of raw materials, utilities, and auxiliary equipment connected to a specific vessel, thereby reducing the potential for hazardous interactions. 

In 1909 one company began selling solar water heaters with separate collectors and insulated storage tanks. The collectors were made of copper tubing soldered to a copper plate in a glass covered box. The hot water was transferred to the storage tank by thermosyphon action, so the insulated tank had to be installed above the collector, typically in the attic or on the roof It was often connected to an auxiliary heater on the stove or furnace to supplement solar... 

The usual packings and auxiliary features associated with these towers have been presented in connection with pressure drop considerations. 

Split-Phase Motor. A split-phase motor is a single-phase induction motor equipped with an auxiliary winding, displaced in magnetic position from, and connected in parallel with, the main winding. Note Unless otherwise specified, the auxiliary circuit is assumed to be opened when the motor has attained a predetermined speed. The term split-phase motor, used without qualification, described a motor to be used without impedance other than that offered by the motor windings themselves, other types being separately defined. 

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