. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. Fig. 58. I< BECnoN AT E Fig. 60. Maxims and Instructions. iij RULE FOR SAFE INTERNAL PRESSURE. The safe internal pressure on cylindrical shells is foundaccording to the following rule, which has been adopted by theUnited States Board of Supervising Inspectors, and any boilershell not found in the tables can be determined by this rule. Rule.—Multiply one-sixth of the lowest tensile strengthfound stamped on any plate in the cylindrical shell by thethickness—express
. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. Fig. 58. I< BECnoN AT E Fig. 60. Maxims and Instructions. iij RULE FOR SAFE INTERNAL PRESSURE. The safe internal pressure on cylindrical shells is foundaccording to the following rule, which has been adopted by theUnited States Board of Supervising Inspectors, and any boilershell not found in the tables can be determined by this rule. Rule.—Multiply one-sixth of the lowest tensile strengthfound stamped on any plate in the cylindrical shell by thethickness—expressed in inches or parts of an inch—of thethinnest plate in the same cylindrical shell, and divide by theradius or half diameter—also expressed in inches—and the re-sult will be the pressure allowable per square inch of surfacefor single riveting, to which add twenty per centum for doubleriveting. The hydrostatic pressure applied, tinder this table and rule,must be in the proportion of one hundred and fifty ]iounds tothe square incii, to one hundred pounds to the square inch ofthe working pressure allowed. Example. What pressure should bo allo
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsteamen, bookyear1917
