. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . oint at which the welding is etfected. A G-in. pipe tnade ofNo. 14 gauge iron of good average quality, showing under test 83,000 lbs. elastic limit, and50,000 lbs. ultimate strength, has a proof strength of 913 lbs. per sq. in., and an ultimatestrength of 1,383 lbs. per sq. in. A 12-in. pij^e of the same stock has a proof strength of456 Ibs.^ and an ultimate strength of 691 lbs. Using the same diameters and gaugesof
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . oint at which the welding is etfected. A G-in. pipe tnade ofNo. 14 gauge iron of good average quality, showing under test 83,000 lbs. elastic limit, and50,000 lbs. ultimate strength, has a proof strength of 913 lbs. per sq. in., and an ultimatestrength of 1,383 lbs. per sq. in. A 12-in. pij^e of the same stock has a proof strength of456 Ibs.^ and an ultimate strength of 691 lbs. Using the same diameters and gaugesof stockfor comparison, the 6-in. spirally welded pipe weighs 5*2 lbs. per ft. against18-77 lbs. per ft. for standard lap-welded pipe, and 28-28 lbs. for medium cast-iron pipe;the 12-in. spirally welded pipe weighs 10-46 lb>. against 54-65lbs. for lap-welded, and 77-36 formedium cast-iron. The question cf durability in service is one whicn naturally suggestsitself when light steel or iron pipes are discussed. Experience on the Pacific Coast seems tohave settled this question, as the cheap expedients adopted for water-conveyance during the G16 PIPE AND TUBE MAKING Macliine for making welded steel pipes. days when hydraulic mining was most extensively conducted have been followed ever since inpermanent engineering works. Data on this subject are presented in a paper read byHamilton Smitn, Jr., before the British Iron and Steel Institute, and printed in Vol. I. ofthe Journal for 1886. Cartwrighfs Pipe-iceiding Machine.—Figs. 8 and 9 represent a machine designed byRobert Cartwright, of Rochester, N. Y., for welding the longitudinal seams of steel pipes oflarge diameter. The general features of the machines are two compound air and gasfui-naees, one internal and one external, immediately in advance of internal and externalrolls, all being mounted on a frame to which a reciprocating motion is imparted by a crank,the seam of the sheet l)eing welded being drawn between th
Size: 2104px × 1188px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
