Welding continued

Furnace butt weld, continuous Straight As required by listed specifications 0.60... 

I/2 Diameter Rod Welded Continuously to Both Tube Sheets. Drill Bottom for Liquid Detection with I/4" Diometer Hole,or Top for Gaseous Detection with I/2" Diometer. Cover Top Hole to Prevent Water Entering. 

A square stainless steel pad (5 in X 5 in X 1/8 in) is welded to a vessel that is used for high-temperature service (1200°C). The welder welds continuously around the pad, forgetting to leave an opening for a vent. Compute the pressure change between the pad and the vessel if the temperature changes from 0°C to 1200°C. 

Edge Welds Do not use for loads Edge weids.are only used to make light 111 many cases seam weld cart be used instead Up to 3/16" plates no bevel is reQuiicd. 1/4" to 7/16" plates use a 30°bevel Over lull thickness of the plates. 1/2" and heather 30°bevel is used Over 3/4 of plate thickness Specify, si/e of weld (the size is equal to the width of the weld)—continuous—intermittent—grind as required... 

Figure 8.20 shows that a continuous welding offers better corrosion protection and strength than intermittent welding. Continuous welding should be used to close the crevices. Welded butt joints should be preferred over bolted joints particularly in new structures (Figs 8.21(a) and (b)). The welds should be cleaned and removed from the parent plate. It is recommended that the smaller side of the weld be placed in contact with the corrosive medium to provide minimum exposure to the weld (Fig. 8.22). 

East Japan Railway Company (JR-East) constructed a prototype train TRY-Z, which consisted of carbodies of three different type structures. A front car was made of thin-wall aluminum hollow extrusions welded continuously. The other front car had a monocoque sandwich structure in which aluminum honeycomb and plates were brazed. The middle car had a skeleton body stmcture of aluminum alloy joined by a combined method of spotwelding and adhesion by a heat setting adhesive. This method is called weldbonding. ... 

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