Plain butt joint

Joints for Flat Adherends. The simplest joint to make is the plain butt joint. Butt joints cannot withstand bending forces, because the adhesive would experience cleavage stress. If the adherends are too thick to design simple overlap-type joints, the butt joint... 

CViemical Ware Acidproof chemical-stoneware pipe and fittings withstand most acid, alkah, or other corrosives, the main exception being hydrofluoric acid. The range of sizes made with the bell-and-spigot joint and with plain butt ends is shown in Table 10-40. 

Plain-end pipe used for socket-weld joints (Fig. 10-126) is available in all sizes, but fittings and valves with socket-weld ends are limited to sizes 3 in and smaller, for which the extra cost of the socket is outweighed by much easier alignment and less skill needed in welding. The joint is not so resistant to bending stress as the butt-welded joint but is otherwise equal, except that for some fluids the crevice between the pipe and the socket may promote corrosion. ANSI B16.il—1973,... 

Figure J.l Common flat adhesive joint designs butt, plain lap, and single strap. (See Appendix K for joint design improvements on these.)...

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