Gussets

Multiwall Paper. MultiwaU. paper bags represent by far the most common type of bag used to store and transport chemicals. The terms sack and bag are often used interchangeably, although sack usually refers to heavier-duty bags. Several types of paper shipping sacks are used commonly in industry, featuring such constmctions as sewn or pasted ends, gussets or flat, and a variety of valves (see Paper). 

Provide gussets on nozzles and small lines, where appropriate... 

Glue was also used to join the numerous small plywood and wood details necessary to fabricate the structural frameworks typical of early aircraft. Fig. 1 shows a monoplane wing circa 1930 fabricated primarily from wood that was joined via more than one thousand glued joints [2]. Note the many small stringers and gussets bonded together to form the ribs and spars of the wing. 

Experience has proven that pulsation drums/bottles/ dampeners must be designed and fabricated using exceptionally heavy construction and good welding techniques and that the addition of support gusset plates to reinforce nozzles and other attachments is essential. 

Figure 13-26. Magnaflux powder shows fatigue cracks that occurred at toes of gussets on a compressor bottle. (Used by permission Hicks, E. J. Oil and Gas Journal, p. 38, July 24,1978. PennWell Publishing Company. All rights reserved.)...

Many situations discovered during the testing of preproduction products can be corrected with a selective use of increased thickness in walls, ribs, and gussets or by eliminating stress concentrations. Changing a material to another grade of the same plastic-or to a different plastic with a suitable... 

Figure 13.28. Flange ring designs (a) Rolled-angle (b) Single plate with gusset (c) Double plate with gusset...

Figure 13.32. Bracket designs (a) Single gusset plate (b) Double gusset plate...

High thickness favours sinking, warpage and shrinkage, porosity and voids. Designing ribs or gussets can reduce wall thickness. 

Plasticized PVC can be extruded in various forms—including layflat film for bags and other containers with gusseted walls, flexible pipework, hoses, and continuous seals in many different configurations. 

PWS, form-fill-seal 1 F/F/S gusseted oag 16x5x30 405 X 125 x760 6 mil PE Heat-sealed LDPE 30 480 Vs in... 

MECHANICAL DESIGN OF PROCESS EQUIPMENT Single-gusset plate design, Figure 13.32a ... 

The upper surface of the baseplate s center is a recessed socket with a latching collar to accept and retain the round base of the barrel, which is free to pivot in all directions. When in use, the barrel may be adjusted vertically from 40° to 85°.Transverse or horizontal movement is 5" total, or 2.5" left or right of center, as measured at the transverse mechanism. The underside of the baseplate is fitted with four triangular feet that dig firmly into the ground to stabilize the mortar under fire.The front edge carries an additional row of four smaller feet that aid in stability.The four main feet,as well as the central socket area, are tied together and reinforced with several gussets and braces. 

To provide adequate stiffness to the walls, gusset plates or T-bars should be welded vertically to the sides from top to the bottom, on the same center as on the I beam support. The bottom periphery of the walls is kept from flexing by its weld to the bottom plate. Similarly, the top should be stiffened, preferably by a channel, or at the least, by a heavy angle, which should be continuously welded completely around the top. The gusset or T plates should be welded to the channel at the top and at the bottom to the centers of the I beam supports, exactly opposite the web, to give optimum stability. A sketch (Figure 34) shows exactly how this should be done. 

Figure 3-4 Recommended style of reinforcing for a rectangular steel tank. Note gusset (section above, left) welded at top to channel, on side to tank wall, on bottom to extension of I beam. 1 beam weld Is to face exactly opposite web (see Section B-B). This type reinforcing prevents deformation of tank walls when loaded. From Chemically Resistant Masonry, by Walter U. Sheppard, Jr., 2nd Ed. (1982), Marcel Dekker, NYC, p 81. Used by permission.

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