. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. If 13 4i « 10 2 * 13 5 * 9 2i * 13 6 «* 8 2i 12 7 •* 8 2i 12 8 ** 8 8 ** 12 9 n 3i * 11 10 6i The above is the regular manufacturers* list of sizes andweights. Note. Boiler tubes are listed and described from the outside diame-ter. This should be noted, as gas-pipe is described from theinside diameter. Thus a 1-inch gas-pipe is nearly 1^ outsidediameter while a 1-inch boiler tube is exactly one in
. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. If 13 4i « 10 2 * 13 5 * 9 2i * 13 6 «* 8 2i 12 7 •* 8 2i 12 8 ** 8 8 ** 12 9 n 3i * 11 10 6i The above is the regular manufacturers* list of sizes andweights. Note. Boiler tubes are listed and described from the outside diame-ter. This should be noted, as gas-pipe is described from theinside diameter. Thus a 1-inch gas-pipe is nearly 1^ outsidediameter while a 1-inch boiler tube is exactly one difference between the two consists in the fact thatthe outside of boiler tubes is rolled smooth and even; gas-pipeis left comparatively rough and uneven. Maxims and Instructions. Ill BOILER the boiler tubes are new and properly expanded thereis a large reserve or surplus of holding power for that part ofthe tube sheet supported by them, this has been proved by ex-periment made by chief engineer W. H. Stock, U. S. N., asshown in the following Table of Holding Power of Boiler Tubes. O a) M. Method of Fastening. Expanded by Dadgeon tool, end riveted by Dudgeon tool, end partly riveted by Dudgeon tool, end riveted by Dudgeon tool, fer- ruled, not riveted expanded by Dudgeon tool. Mr. C. B. Eichards, consulting engineer at Colts Armory atHartford, Conn., made some experiments as to the holdingpower of tubes in steam boilers, with the following results :The tubes were 3 inches in external diameter, and of aninch thick, simply expanded into a sheet f of an inch thick bya Dudgeon expander. The greatest stress without the tubesyielding in the plate was 4,500 pounds, and at 5,000 poundswas drawn from the sheet. These experiments were repeatedwith the ends of the tubes which projected .through the sheetthree-sixteenths of an inch, being flared so that the externaldiameter in the sheet was expanded to 3.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsteamen, bookyear1917
