The Boiler (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...19,921 =strength of net section of plate. Third: --resistance to crushing of rivet or plate. Formula: PxTxTS = strength of solid plate. Example: 1. 8750 =pitch of rivets. 3125 =thickness of plate The net section of rivets is the weakest part of joint. To find the efficiency of joint, multiply the weakest section by constant 100 and divide by the strength of solid plate. Example: 19,703 =shearing resistance of one rivet 35,156 = strength of solid plate 35,156) 19,703.00 (. 56 = 56% efficiency of joint 17 579 0 2 125 00 2 109 36 Rule to find safe working pressure from these calculations: Multiply the tensile strength of plate by the efficiency of joint and this sum by twice the thickness of plate: divide this product by diameter of boiler multiplied by factor of safety. Formula: TSX% X (2 XT) Rule to find thickness of plate: Multiply pressure by factor 6 and multiply again by radius or one-half diameter of boiler and divide product by tensile strength of plate; the quotient will be thickness of plate. Legend: F =factor = 6 R = radius =30" or one-half diameter. TS = tensile strength =60000 P =pressure = 125 lbs. Formula: PXFXR = thickness of plate TS Example: 125 =lbs. pressure 6 =factor 750 30 = radius tensile strength =60000)22500000(3750 = % plate 180000 450000 420000 300000 300000 Rule to find pitch of rivets for single, double and triple riveted lap joints when the shearing strength of rivets is near equal to strength of net section of plate: Multiply area of rivet hole by the shearing resistance of rivets and by number of rows of rivets; divide product by thickness of plate multiplied by tensile strength; add to quotient the diameter of rivet hole. Formula: AxSSXN h DH = pitch single riveted joint TXTS Legend: A =area of rivet = 15/16 =. 6903 SS = sh...