Line blinds

Line blind Figure 8 blind Restriction orifice (figd) Restriction orifice (union) Removable type orifice... 

Valves are rarely included in reboiler piping — except, for example, when a standby reboiler is provided or when two or three reboilers are used and operated on an extremely wide heat capacity range. Some companies require line blinds at the tower nozzles for blanking off during shutdown, turn-around and maintenance. 

The line-blind valve is used where an absolute positive line shut-off is required upstream and... 

Can parts of the plant be reliably isolated from others by line blinds in order to carry out maintenance and repair work, leak and pressure tests ... 

Fig. 63 (a) Absorption and (b) emission spectra of Nile Red in THF (squares), Nile Red-loaded polymersomes (circles), blank polymersomes (dashed line), blind samples with no copolymer (dark gray dots), blind samples with just PEO polymer with molecular weight of approximately 3,500 g/mol (light gray dots), and Nile Red in polybutadiene (black dots). From [269]... 

Line blinding, which is often done in conjunction with the other methods, requires that a flat piece of metal be bolted to the flange at the end of the exposed line. The blind should be rated to take full line pressure plus the appropriate safety margins. In order to check that a blind is in place, it usually has a short handle which juts out from between the flange faces. 

A line blind—also known as a spade, paddle, skillet, pancake, or slip blind— consists of a solid metal disk with a thin length of metal attached to it. The metal of the blind should be rated for full process pressure on one side and atmospheric pressure on the other side. The handle should be long enough so that it can be seen through insulation and any other materials that might be covering the flange. 

Location and installation of Vents, drains, drip legs, drip rings, utility station connections, steam traps, filten, strainers line blinds, spectacle plates, by-passcs, insinimeni lapping points for pre.ssure, temperature and flow, plugs and rodding out points ... 

Muns ENDOR mvolves observation of the stimulated echo intensity as a fimction of the frequency of an RE Ti-pulse applied between tlie second and third MW pulse. In contrast to the Davies ENDOR experiment, the Mims-ENDOR sequence does not require selective MW pulses. For a detailed description of the polarization transfer in a Mims-type experiment the reader is referred to the literature [43]. Just as with three-pulse ESEEM, blind spots can occur in ENDOR spectra measured using Muns method. To avoid the possibility of missing lines it is therefore essential to repeat the experiment with different values of the pulse spacing Detection of the echo intensity as a fimction of the RE frequency and x yields a real two-dimensional experiment. An FT of the x-domain will yield cross-peaks in the 2D-FT-ENDOR spectrum which correlate different ENDOR transitions belonging to the same nucleus. One advantage of Mims ENDOR over Davies ENDOR is its larger echo intensity because more spins due to the nonselective excitation are involved in the fomiation of the echo. 

Multielevation piperacks are usually needed to handle all the required services for piping, electrical, utilities, and instmmentation. The two-level rack is one of the most common but three-level ones are also used. The utility lines are usually mn in the upper level and the process lines in the lower levels. The larger-diameter lines are located to the outside of the rack to be closest to the column supports. Access platforms are required at the battery limit to provide operators access to the block valves and blinds. If long mns of hot pipe are required, a portion of the pipe rack needs to be dedicated to an expansion loop. A horizontal space in the piperack is provided for a set of lines to be flat-turned into a set of expansion loops with the large pipes located on the outside. AH of the pipe turns are in the same horizontal plane, which is an exception to normal piping practice. A flat turn takes up and blocks space for other pipes. Flat turns are generally only made from the outside of the rack to minimize this blockage. 

The potassium hydroxide electrolyte used in alkaline batteries is a corrosive hazardous chemical. It is a poison and if ingested attacks the throat and stomach linings. Immediate medical attention is required. It slowly attacks skin if not rapidly washed away. Extreme care should be taken to avoid eye contact that can result in severe bums and blindness. Protective clothing and face shields or goggles should be worn when filling cells with water or electrolyte and performing other maintenance on vented batteries. 

Unit checkout Check that required mechanical work has been completed, tags and blinds pulled, and temporary piping disconnected. Plant supervision must certify completion of work. Cancel all entry and work permits. Utility system has been commissioned. Check blind list and inspect lines close bleed, drain and sample valves. 

Routing of Flare Header through Process Areas - Flare headers in process areas should be routed to avoid locations of particularly high fire risk, such as over pumps, near furnaces, etc. The headers and subheaders should also be laid out and provided with isolating CSO valves and spectacle blinds, unless prohibited by local codes, such that it is not necessary for flare lines to remain in service in units which are shut down separately. Blowdown and water disengaging drums should be spaced from process areas. 

A boiler had been shut down for the repair of a forced draft fan. A blind was not installed in the fuel gas line, nor apparently was a double block and bleed in the fuel line utilized. Gas leaked into the firebox during the repair period and was not removed. A severe explosion occurred during the attempt to light of. 

While a plant was on-line a worker noticed a blind in a tank vent. The blind had been fitted to isolate the tank from the blowdown system while the tank was being repaired. When the repairs were complete, the blind... 

If an optimization tuns out of steps, do not blindly assume that increasing the number of steps will fix the problem. Examine the output and determine whether the optimization was making progress or not. For example this command will provide a quick summary of an optimization s progress on a UNIX system (blank lines ate added for readability) ... 

Verbleiung,/. leading lead lining, verblenden, v.t. blind, dazzle dim, black out ... 

The clinical trial that resulted in FDA approval of bevacizumab (February 2004) was a randomized, double-blind, phase III study in which bevacizumab was administered in combination with bolus-IFL (irinotecan, 5FU, leucovorin) chemotherapy as first-line therapy for previously untreated metastatic colorectal cancer [3]. Median survival was increased from 15.6 months in the bolus-IFL + placebo arm to 20.3 months in the bolus-IFL + bevacizumab arm. 

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