Flange cover

Although most units are installed horizontally, inclined, Figure 10-177, and vertical units are also in service. Figures 10-178 and 10-179 show typical assemblies for tube bundles with fabricated or cast end headers and also with flanged cover plates. 

Insulation formed by slurry casting or heat curing under pressure in molds in a number of insulation types. Most common moldings are preformed bends, valve boxes and flange covers. 

Figure 1. The MHHP modular sorber diagram 1 - tubular case of the hydride module 2 -corrugated heat-conducting insert 3 - hydrogen ceramic collector-filter 4 - metal hydride 5 - tip of a metal hydride bed 6 - hydrogen manifold 7 - spacer plate 8 - heat exchanger shroud 9 - union 10 - flange-cover of a heat exchanger. Heat exchanger thermal insulation is not shown conditionally.

All interconnected pipes, flanges, covers, etc. should withstand the maximum explosion pressure of the dust being handled. 

Use of masking tape as flange covers should be banned. In one incident (203), erratic reboiler action resulted from a piece of masking tape left in a reboiler flange. Plastic flange covers are better, because these must be removed before bolting. 

When preparing for shipment, flange covers should be shipped in place. Flanges or pads that do not have covers should be protected with temporary covers securely fastened in place. 

Webs and other plates elements 1.49 side for box flanges Distance between lines of welds or bolts for flange cover plates Clear distance between flanges minus fillet radii for webs of rolled... 

Valves and fittings are most often insulated with field-mitered sections of the standard pipe insulation or shop-fabricated fitting covers. There is limited usage of mesh-enclosed blankets, which are laced around large valves. Also, cellular glass valve and flange covers are often used in conjunction with other insulations when the fluid being transported is volatile or has a low flash point. 

The cataly.st is removed infrequently. Removal is accomplished during. shutdowns after cool-down by allowing the catalyst to exit through the bottom unloading nozzle. After removal of the flange cover on... 

Screw Conveyors Normally, screw conveyors are totally enclosed except at the ends, where emissions can be controlled by proper transfer chute design. To maintain a proper dust seal, a neoprene rubber gasket should be installed on the trough cover. Many manufacturers provide two-bar flanges and formed-channel cross members that make a continuous pocket around the trough. The flange-cover sections are set in this channel. Once the channel section is filled with dust, an effective dust seal is created. 

BUND FLANGES, COVER PLATES, AND FLANGES 10.1 INTRODUCTION... 

Blind Flanges, Cover Plates, and Flanges Introduction... 

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