Document 5jQnOd4oqBmNyvZkkyorjOOz

306 Chapter 16 . 1945 Guide wrought pipe. Cast-ferrous pipe may be obtained coupled, beveled for welding, or with ends plain or grooved for the several types of couplings. It is easily cut and threaded as well as welded. The fact that it is readily welded enables the manufacturers to supply the pipe in any lengths practicable for handling. ~' ~- Alloy Metal Pipe. Steel.pipe bearing a small alloy of copper or other alloying element and iron pipe bearing a small alloy of copper and molyb denum have been claimed to possess more resistance to corrosion than plain. 30 40Table 1. Dimensions of Schedules and and Standard Weight Pipe3 - i External Internal Plain Ends Threads and Couplings | Threads per In. External External Internal External Surface Internal Surface ' DUMETER In. Weight per Ft, Lb Size JS 1 s Circum ference, In. Tranevkbss Area, - -. . Sq In. a 2a 3s Length of Pipe, Ft per Sq Ft LLength op Pipe, Ft Con taining ICuFt Weight op Wateb, b per Ft k 0.405 0.269 0.068 0544 0.245 27 0.540 0564 0.088 0.424 0.425 18 % 0.675 0.493 ao9i 0567 0568 18 0.840 0.622 0.109 0550 0552 14 1572 0545 1.696 1.144 2.121 1549 2.639 1.954 0.129 0529 0558 0554 0.057 0.104 0.191 0504 0.072 9.431 14.199 2533.775 0.025 0.125 7573 10.493 1383.789 0.045 0.167 5.658 7.748 754560 0.083 ' 0550 4547 6.141 473.906 . 0.132 imH 1J350 0524 0.113 1.130 1.134 14 1 1515 1549 0.133 1.678 1.684 3599 2589 0566 4.131 3596 1558 m 1W1.660 1580 (L140 2572 2.281 IlH 5515 4535 * 2.164 1.900 1.610 0.145 2.717 2.731 5.969 5458 2535 0533 0564 1.495 2.036 0533 0.494 0.669 0.799 3.637 2.904 2501 2510 4.635 3.641 2.768 2572 270.034 166.618 96575 70.733 0531 0575 0.65 053 2 2.375 2.067 ai54 3.652 3.678 im 7.461 6.494 4.430 `iY, 2.875 2.469 a203 5.793 5519 8 9.032 7.757 6.492 3 3.500 3.068 a2ie 7575 7.616 8 10.996 9.638 9.621 3M 4.000 3548 a226 9.109 9.202 5 12566 11.146 12566 3555 4.788 7593 9.886 1.075 1.704 2528 2.680 1,608 1528 1.091 0,954 1547 1547 1545 1.076 42.913 1.45 30577 2.07 19.479 .3.20 : 14565 4.29 4 4500 4.026 a237 10.790 10589 8 14.137 12.648 15.904 12.730 3.174 0548 0.948 11512 5.50 6 -5563 5.047 a258 14.617 14510 8 17.477 15556 24506 20.006 4500 0.686 0.756 7.198 8.67 .6 6.625 6.065 a280 18.974 19.185 8 20513 19.054 ^34.472 28.891 5581 0576 0.629 4.984 1251 8C 8.625 8.071 0577 24.696 25.000 8 27.096 25556 58.426 51.161 7565 0.443 0.473 8 8.625 7.981 0522 28554 28509 8 27.096 25.073 58.426 50.027 8599 0.443 0.478 2515 2258 2578 21.70 10C 10.750 16.136 0507 34540 35.000 8 10 . 10.750 10.020 0565 40.483 41.132 8 12c 12.750 12.090 0530 43.773 45.000 8 12 12.750 12.000 0575 49562 50.706 8 33.772 31543 90.763 80.691 10572 0555 0576 33.772 31.479 90.763 78.855 11.908 0555 0581 40.055 37.982 127.676 114500 12576 0599 0515 40.055 37.699 127.676 113.097 14579 0599 0518 1.785 34.95 1526 3450 1.254 49.70 1573 49.00 "Standard-weight wrought-iron pipe has approximately the same wall thicknesses and weights as contained herein for steel pipe. For exact dimensions, see American Standardfor Wrought-Iron and Wrought- Steel Pipe, A<SJl. B36.10. ' , hThicknesses shown in bold face type are identical with thicknesses for Schedule 40 pipe of A~S.A. B36.10. eSame as Schedule 30, AS.A. B36.10. steel pipe and they are advertised arid sold under various trade names. ;-x .v <vy 4i - Copper Pipe-and Fittings. Owing to. its inherent resistance to cor rosion, copper and brass pipe have always been used in heating, venti lating, and water supply installations, but the cost with standard dimen sions for threaded connections has been high. The recent introduction of fittings which permit erection by soldering or sweating allows the use of pipe with thinner walls than are possible with threaded connections, thereby reducing the cost of installations. The initial cost of brass and copper pipe installations generally runs higher than the corresponding job with steel pipe and screwed connections in spite of the.use of thin wall pipe, but the corrosive nature of the fluid conveyed or the inaccessibility of some of the piping may warrant use of a more expensive material than plain steel. The advantages of corrosion- Pipe, Fittings, Welding ___________ _________________ '. _________ _________ _' 307 resisting pipe and fittings should be weighed against the correspondingly higher initial cost. \ COMMERCIAL PIPE DIMENSIONS The two weights of steel and wrought-iron pipe commonly used are known as standard weight and extra strong, which correspond to Schedules 40 and 80 respectively of the American Standard for Wrought-iron and Wrought-Steel Pipe, A.S.A. B36.10. The same external diameter is used for both weights of each nominal size for manufacturing reasons as well Table 2: Standard Weights and Dimensions of Welded and Seamless Steel Pipe3 Standard-Weight Pipe Size Outside No. OP Diame Threads ter, In. per In. Schedule 30 * Wall Thick ness, In. Weight per Ft, Lb TAC Schedule 40 Wan Thick ness, In.. Weight perFt, Lb TAC Extra-Strong Pipe Schedule 60 Schedule 80 WaU Thick ness, In. Weight perFt, Lb Plain Ends Wan Thick ness, In. Weight perFt, Lb Plus Fnria Double Extra Strong PiFsb WaU Thick ness In. Weight per Ft, Lb Plain - Bnrfa M 0.405 27 H 0.540 18 X 0.675 18 i ....... 0540 14 0.068 0538 0.091 0.109 0.25 0.43 057 . 055 0.095 0.119 0.126 0.147 051 054 0.74 159 0594 1.71 M 1.050 i 1515 w* 1.660 1H 1.900 2 . 2575 2H 2575 3 3500 3M . 4.000 4 4500 14 HH 11H lltt iiH 8 8 8 8 0.113 0.133 0.140 0.145 0.154 0.203 0.216 0526 . 0537 1.13 1.68 2.28 2.73 3.68 5.82 7.62 9.20 1059 ......... -- 0.154 0.179 0.191 0.200 0518 0576 0.300 0518 0.337 1.47 2.17 350 3.63 5.02 7.66 1055 1251 14.98 0508 0558 0582 0.400 0.436 0552 - 0.600 0.636 0.674 2.44 3.66. 5.21 6.41 953 13.70 1858 2255 2754 5 5563 8 0558 1451. 0575 20.78 0.750 3355 6 6.625 8. 0.280 19.19 0.432 2857 0564 53.16 8 8.625 8 0577 25.00 0522 2851 0500 4359 0575 72.42 10c 10.750 8 0.307 35.00 0565 41.13 0500 54.74 ..... -- 12d 12.750 8 0530 45.00 0575 50.71 05006 65.41 -- From Standard Specifications fox Welded and Seamless Steel Pipe of the American Society for Testing Materials, AS.T.M. Designation A120. "Sizes larger than those shown in the table are measured by their outside diameter, such as 14 in. out side diameter, etc. These larger sizes will be furnished with plain ends, unless otherwise specified. The weights will correspond to the manufacturers* published standards although it is possible to calculate the theoretical weights for any given size anrf wall thickness on the basis of 1 cu in. of steel weighing 0.2833 lb. *The American Standard for Wrought-iron and Wrought-Steel Pipe A^S-4. B36.10-1939 has assigned no schedule number to Double Extra-Strong pipe. , "A 10 in. Standard Weight pipe is also available with 0.279 in. waU thickness, but this Wall is not covered by a Schedule Number. . dOwing to a departure from the Standard-Weight and Extra-Strong wall thicknesses for the 12 in. nominal size. Schedules 40 and 60, Table 2 of the AJS-A. B36.1Q-1939, Standard for Wrought-iron and Wrought- Steel Pipe, the regular Standard and Extra-Strong wall thicknesses (0.375 in. and 0.500 in.) have been substituted. as to afford interchangeability in threading, and other elements associated with fabrication and erection. Hence the difference in wall thickness is accompanied by a corresponding change in inside diameter. In sizes up to 14 in., pipe is designated by its nominal size which corresponds roughly, to the inside diameter of Schedule 40 pipe. In sizes 14 in. and upward, pipe is designated by. its outside diameter (O. D'.), and the wall thickness is specified. While the demands for pipe for the heating and ventilating industry are reasonably well served by Schedule 40 (standard weight) pipe, the erection of pipe by welding sometimes warrants using lighter wall thicknesses. The considerations governing pipe wall-thickness and its relation to joint' design are covered in the American Standard Code for Pressure Pipings S~A. B31.1-1942, see Section 122. Standard schedules of pipie thick-