Part 42 (2/2)
BOILER ROOM PIPING
In the design of a stea system should receive the most careful consideration Aside froood practice in which is fairly well established, the i to be e difficulties from the presence in the system of water of condensation and the ineering opinion varies considerably on the question of s for different classes of work, and the following is offered siood representative practice
All pipe should be of wrought iron or soft steel Pipe at present is ”[76] and ”double extra strong”
weights Until recently, a fourth weight approxihter than standard and known as ”Merchants” was built but the use of this pipe has largely gone out of practice Pipe sizes, unless otherwise stated, are given in terives the di wrought-iron pipe
TABLE 62
DIMENSIONS OF STANDARD AND EXTRA STRONG[76]
WROUGHT-IRON AND STEEL PIPE
_______________________________________________________________ | | | | | | Diameter | Circumference | | |__________________________|__________________________| | | | | | | | |External| Internal |External| Internal | | |Standard|_________________|Standard|_________________| | | and | | | and | | | | Nominal | Extra |Standard| Extra | Extra |Standard| Extra | | Size | Strong | | Strong | Strong | | Strong | |_________|________|________|________|________|________|________| | | | | | | | | | 1/8 | 405 | 269 | 215 | 1272 | 848 | 675 | | 1/4 | 540 | 364 | 302 | 1696 | 1144 | 949 | | 3/8 | 675 | 493 | 423 | 2121 | 1552 | 1329 | | 1/2 | 840 | 622 | 546 | 2639 | 1957 | 1715 | | 3/4 | 1050 | 824 | 742 | 3299 | 2589 | 2331 | | 1 | 1315 | 1049 | 957 | 4131 | 3292 | 3007 | | 1-1/4 | 1660 | 1380 | 1278 | 5215 | 4335 | 4015 | | 1-1/2 | 1900 | 1610 | 1500 | 5969 | 5061 | 4712 | | 2 | 2375 | 2067 | 1939 | 7461 | 6494 | 6092 | | 2-1/2 | 2875 | 2469 | 2323 | 9032 | 7753 | 7298 | | 3 | 3500 | 3068 | 2900 | 10996 | 9636 | 9111 | | 3-1/2 | 4000 | 3548 | 3364 | 12566 | 11146 | 10568 | | 4 | 4500 | 4026 | 3826 | 14137 | 12648 | 12020 | | 4-1/2 | 5000 | 4506 | 4290 | 15708 | 14162 | 13477 | | 5 | 5563 | 5047 | 4813 | 17477 | 15849 | 15121 | | 6 | 6625 | 6065 | 5761 | 20813 | 19054 | 18099 | | 7 | 7625 | 7023 | 6625 | 23955 | 22063 | 20813 | | 8 | 8625 | 7981 | 7625 | 27096 | 25076 | 23955 | | 9 | 9625 | 8941 | 8625 | 30238 | 28089 | 27096 | | 10 | 10750 | 10020 | 9750 | 33772 | 31477 | 30631 | | 11 | 11750 | 11000 | 10750 | 36914 | 34558 | 33772 | | 12 | 12750 | 12000 | 11750 | 40055 | 37700 | 36914 | |_________|________|________|________|________|________|________|
__________________________________________________________ | | | | | | | | Length | | | | Internal | of | Noht | | | Transverse |Pipe in | Pounds per | | | Area |Feet per| Foot | | |_____________________| Square |_________________| | | | |Foot of | | | | Nominal | Standard | Extra |External|Standard| Extra | | Size | | Strong |Surface | | Strong | |_________|__________|__________|________|________|________| | | | | | | | | 1/8 | 0573 | 0363 | 9440 | 244 | 314 | | 1/4 | 1041 | 0716 | 7075 | 424 | 535 | | 3/8 | 1917 | 1405 | 5657 | 567 | 738 | | 1/2 | 3048 | 2341 | 4547 | 850 | 1087 | | 3/4 | 5333 | 4324 | 3637 | 1130 | 1473 | | 1 | 8626 | 7193 | 2904 | 1678 | 2171 | | 1-1/4 | 1496 | 1287 | 2301 | 2272 | 2996 | | 1-1/2 | 2038 | 1767 | 2010 | 2717 | 3631 | | 2 | 3356 | 2953 | 1608 | 3652 | 5022 | | 2-1/2 | 4784 | 4238 | 1328 | 5793 | 7661 | | 3 | 7388 | 6605 | 1091 | 7575 | 10252 | | 3-1/2 | 9887 | 8888 | 955 | 9109 | 12505 | | 4 | 12730 | 11497 | 849 | 10790 | 14983 | | 4-1/2 | 15961 | 14454 | 764 | 12538 | 17611 | | 5 | 19990 | 18194 | 687 | 14617 | 20778 | | 6 | 28888 | 26067 | 577 | 18974 | 28573 | | 7 | 38738 | 34472 | 501 | 23544 | 38048 | | 8 | 50040 | 45664 | 443 | 28544 | 43388 | | 9 | 62776 | 58426 | 397 | 33907 | 48728 | | 10 | 78839 | 74662 | 355 | 40483 | 54735 | | 11 | 95033 | 90763 | 325 | 45557 | 60075 | | 12 | 113098 | 10843 | 299 | 49562 | 65415 | |_________|__________|__________|________|________|________|
Dimensions are nominal and except where noted are in inches
In connection with pipe sizes, Table 63, giving certain tube data may be found to be of service
TABLE 63
TUBE DATA, STANDARD OPEN HEARTH OR LAP WELDED STEEL TUBES
+-----+--+----+-----+------+------+------+------+-------+-------+-------+ |S E D|B | T | I D |Circuth |Noht | |z t a|W | i | t a | |Square Inches| of | per |Pounds | |e e m| | c | e m +------+------+------+------+ Exter |Square | per | | r e| | k | r e |Exter-|Inter-|Exter-|Inter-| -nal |Foot of| Foot | | n t|G | n | n t | nal | nal | nal | nal |Surface| Exter | | | a e|a | e | a e | | | | | per | -nal | | | l r|u | s | l r | | | | |Foot of|Surface| | | |g | s | | | | | |Length | | | | |e | | | | | | | | | | +-----+--+----+-----+------+------+------+------+-------+-------+-------+ |1-1/2|10|134|1232| 4712| 3870|17671|11921| 392 | 2546 | 1955 | |1-1/2| 9|148|1204| 4712| 3782|17671|11385| 392 | 2546 | 2137 | |1-1/2| 8|165|1170| 4712| 3676|17671|10751| 392 | 2546 | 2353 | | 2 |10|134|1732| 6283| 5441|31416|23560| 523 | 1909 | 2670 | | 2 | 9|148|1704| 6283| 5353|31416|22778| 523 | 1909 | 2927 | | 2 | 8|165|1670| 6283| 5246|31416|21904| 523 | 1909 | 3234 | |3-1/4|11|120|3010|10210| 9456|82958|71157| 850 | 1175 | 4011 | |3-1/4|10|134|2982|10210| 9368|82958|69840| 850 | 1175 | 4459 | |3-1/4| 9|148|2954|10210| 9280|82958|68535| 850 | 1175 | 4903 | | 4 |10|134|3732|12566|11724|12566|10939| 1047 | 954 | 5532 | | 4 | 9|148|3704|12566|11636|12566|10775| 1047 | 954 | 6000 | | 4 | 8|165|3670|12566|11530|12566|10578| 1047 | 954 | 6758 | +-----+--+----+-----+------+------+------+------+-------+-------+-------+
Dimensions are nominal and except where noted are in inches
Pipe Material and Thickness--For saturated stea 160 pounds, all pipe over 14 inches should be 3/8 inch thick O D pipe
All other pipe should be standard full weight, except high pressure feed[77] and blow-off lines, which should be extra strong
For pressures above 150 pounds up to 200 pounds with superheated steah pressure steaht runs and bends of high pressure stea Van Stone joints should be extra strong All piping 7 inches and over having Van Stone joints should be full weight soft flanging pipe of special quality Pipe 14 inches and over should be 3/8 inch thick O D pipe All pipes for these pressures not specified above should be full weight pipe
flanges--For saturated steaht-iron pipe should be cast-iron threaded All high pressure threaded flanges should have the dia in accordance with the ”es
All low pressure flanges should have dia in accordance with ”es”
The flanges on high pressure lines should be counterbored to receive pipe and prevent the threads froh the flange at least 1/16 inch, placed inoff the end one se to make it square with the axis of the pipe
[Illustration: 2000 Horse-power Installation of Babcock & Wilcox Boilers and Superheaters, Equipped with Babcock & Wilcox Chain Grate Stokers at the Kentucky Electric Co, Louisville, Ky]