. Electric railway review . in Figure 376 may be run down to the bottom of the cistern and the discharge valveused as in figure 377. Class T 1—Grease Sewer Main. Grease sewers are not generally dignified as systems; infact, they are usually given but little consideration. Insteadof well planned systems being installed, one finds that greasydischarges are run into the blow-off. Figure 46 shows in ageneral way the cold sewers and the hot sewers, each as aseparate line. There are many greasy wastes in a plant thatshould not be discharged into the regular gravity grease sewers should be
. Electric railway review . in Figure 376 may be run down to the bottom of the cistern and the discharge valveused as in figure 377. Class T 1—Grease Sewer Main. Grease sewers are not generally dignified as systems; infact, they are usually given but little consideration. Insteadof well planned systems being installed, one finds that greasydischarges are run into the blow-off. Figure 46 shows in ageneral way the cold sewers and the hot sewers, each as aseparate line. There are many greasy wastes in a plant thatshould not be discharged into the regular gravity grease sewers should be constructed similarly to the blow-off systems, but if free from pressure they may be built of ironsoil pipe with calked lead joints and run underground. It Upartly due to the fact that these greasy drips ruin cementwork that separate lines are necessary. The various locations of hot sewer inlets make it quiteimpossible to use standard wrought pipe and to place thegrease lines above ground. In Figure 46 the pipe is shown. Figure 378 (T 1-1) resting on loose packing sand and provided with a sleevethrough the cement floor, which latter detail allows for themovement of the pipe. If screwed wrought-iron pipe wereused for the hot sewer, it would last indefinitely if the sewerwere not subjected to pressure in blowing off, as oil wouldalso be discharged through the blow-off cistern. Figure 378(Tl-1) shows good construction for a separate blow-off orgrease separating tank with a small vapor pipe. As built thegrease would remain in this tank until remo%-ed, and as acomparatively large amount of oily drips would reach thistank a considerable amount of grease would be collected. Thedrip line is carried through a tile pipe, the purpose of whichis to hold the soil away from the line. Each branch of thedrip line should have a tight connection at its upper end toprevent steam from coming out of the tile pipe. The drip lineshould run down into the tank sufficiently far to prevent muchagitati
Size: 2731px × 915px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
