Special Design Options

Several special design options are available and have been provided by at least one U.S. flame arrester mannfactnrer as follows (Mendoza 1999)  

Nozzles can be installed on the flame arrester honsing for injecting snuffing steam, carbon dioxide, or a suppressant into the arrester to extinguish a standing flame on the arrester element. 

Nozzles can also be installed on the flame arrester honsing for the injection of hot cleaning solntion for on-line cleaning of polymeric deposits (Dafft 1999). This is especially nseful for very large flame arresters that cannot be easily removed from service. 

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The metal hydride active material and constmction also have similar special design options. The active materials may be adjusted to influence one or more of the factor of capacity, power, and/or cycle life. For the AB5 system, typical formulas include ... 

For a protected development of light-sensitive substances, a specially designed cover, the Baron Protective Cover against Light for Development Chambo-s, provides auxiliaries. For various chamber sizes of different manufacturers, adjusted models are available. As a special option, a connection for protective gas can also be installed. 

Several recovery scenarios were considered for remediation. Initially, construction of a narrow, permeable trench parallel to the canal appeared to be an appropriate interception system. The construction technique considered was use of a specially designed deep trenching unit. This type of trench would have included a tile drain leading to a single two-pump recovery well. However, a review of the subsurface site plans and interviews with long-term employees determined that an unknown number of buried pipes traverse the area intended for the trench construction. Disruption of refining operations and safety considerations resulted in rejection of this option. 

Common characteristics of all viable process Raman instmments include the ability to measure at multiple locations, simultaneously or sequentially, and in a variety of electrically classified or challenging environments with no special utilities. The instrument must be reasonably rugged and compact, and not require much attention, servicing, or calibration [19]. Modem process Raman instruments essentially are turnkey systems. It is no longer necessary to understand the optical properties and other instrnment details to suc-cessfnlly nse the techniqne. The general design options will be described briefly, bnt more information is available elsewhere [20,21]. This section will focus primarily on special instrumentation considerations for process installations. 

AS No. 2 (optional) 0.001-0.01% d 1.7 vel of deton 5000 m/sec temp of expln-not given. To initiate hydrobel chges under high hydrostatic pressure, it is necessary to use a specially designed Cu tube submarine electric detonators Ref . McAdam Westwater Mining Explosives, Oliver Boyd, Edinburgh (1958), p 109 NOTE The compn of AS No 2 is not reported... 

Single unit filters are available in standard sizes for up to 5000 gpm and 16 in. pipework. Larger, nonstandard sizes of up to 15,000 to 20,000 gpm are often also available. Design options usually include various screen apertures, filtering water down to perhaps 30 to 50 p particle size and units suitable for special purposes. 

In addition to immediate response options, we also examined a variety of longer-term options. The two most reasonable options were long-term storage of the contaminated soil in a centralized landfill or incineration in a specially designed, large-scale incinerator, with appropriate economics of scale (1, ). 

The new generation of digital sampling oscilloscopes (36,45) and specially designed time-domain measuring setups (TDMS) (38) offer comprehensive, high precision, and automatic measuring systems for TDS hardware support. They usually have a small jitter faetor (< 1.5 ps), important for rise time, a small flatness of ineident pulse (< 0.5% for all amplitudes), and in some systems a unique option for... 

Steam is one of the most common options for heating. However, a steam pressure of 10 kg/cm and more will be required for achieving 150 °C and higher temperatures. This needs specially designed and fabricated vessels (heating jackets and coils), steam pipelines, and valves, with the approval of Pressure Vessel and Steam Boiler Inspection Authorities in the country. This is not necessary when heat transfer oils are used for heating even up to 270 °C as the system can operate at atmospheric pressure. 

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