Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . dy to lay out our pattern. The stretch-out of top end of the flange is obtained from the semi-circleAEB, Fig. 6, and that of the lower part, or where the flangestrikes the roof, is obtained from the section CFD, Fig. the line AC, Fig. 9, equal in length to AC, Fig. 6. Seta pair of dividers to the distance o-i on CFD and anotherpair to the distances o-i, i-2, etc., on AED. These dis-tances are all equal. With 0 as a center
Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . dy to lay out our pattern. The stretch-out of top end of the flange is obtained from the semi-circleAEB, Fig. 6, and that of the lower part, or where the flangestrikes the roof, is obtained from the section CFD, Fig. the line AC, Fig. 9, equal in length to AC, Fig. 6. Seta pair of dividers to the distance o-i on CFD and anotherpair to the distances o-i, i-2, etc., on AED. These dis-tances are all equal. With 0 as a center and o-i on CFD as a / 28 LAYING OUT FOR BOILER MAKERS radius strike the arc o-i. With o as a center and the distance 5, 6 and 7, and on the small pipe 8, 9. 10. n, 12, 13 and 14. P-i, Fig. 8, as a radius, strike an arc cutting the previously Now divide the surface of the connection into triangles by constructed arc at i. With i as a center and the distance L-i, connecting points 1-8, 2-9, 3-10, etc., by solid lines and the Fig. 7, as a radius, strike an arc, and with 0 as a center and points 2-8, 3-9, 4-10, etc., by dotted lines, as shown in Fig. 10. • 4 ^ 6. -the distance o-i, Fig. 6, as a radius, strike an arc cutting thisarc at i. Continue this process until the points 10 and 10are reached. Draw a smooth curve through these points andjoin 10 and 10. The resulting surface ABCD gives us thedevelopment of one half of the hood. The other half is ex-actly similar. THE LAYOUT OF A y CONNECTION. The plan and elevation of a Y connection, such as it is fre-quently necessary to construct for the uptakes of boilers or inbranch pipe work, is shown in Fig. 10. The main pipe is circu-lar and the two branch pipes are oval in shape, the diameter ofthe large pipe and major diameter of the small pipes being thesame. It will be seen that only would the connection fromthe large pipe to one of the rmaller ones be an irregular anddifficult piece to lay out, but that the intereseclion of t
Size: 1507px × 1657px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
