Page 260 - Applied Process Design For Chemical And Petrochemical Plants Volume II

Packed Towers 249

Table 9-2
Carbon Raschig Rings
. _. ........ _ .................. ..... - ........
Nominal Wall O.D. and Approx. Avg. Approx. Avg. Approx. Avg. Percent Equivalent
Size, Thickness, Length, Number per Weight per Surface Area, Free Gas Spher. Dim.
In. In. In. Ft3 Ft3, Lb F2/Ft? Space Dp, In.
% !46 Y4 85,000 46 212 55 0.27
w x6 x 10,600 27 114 74 0.42
K ?4 % 3,150 34 74 67 0.72
1 M 1 1,330 27 37 74 0.87
1% Xr, 1% 678 31 45 69 1.10
1% % 1% 390 34 37.5 67 1.40
2 % 2 166-157* 27 28.5 74 1.75
3 '%6 3 30-44" 23 19 78 2.50
3(D) .%I3 3 74 49.5 29 66 2.50
3(S) '%6 3 64 43 25 71 2.50
........... - - ........ .... . .....
S = Square pattern
D = Diamond pattern } Stacked
From: M. Leva. US. Stoneware Co., Akron, Ohio: Ref. 40, and Bulletin CP-2512, National Carbon Co., New York, N.Y.; updated 12/93 by permission
Norton Chemical Process Products Corp., Bull. CTP-1.
*Varies with supplier

Table 9-3
Metal Raschig Rings
.... . - . . ...... - ~_
Wall O.D. and Approx. Avg. Approx. Avg. Approx. Avg. Percent Equivalent
Thickness, Length, Number per Weight per Surface Area Free Gas Spher. Dim.
In. In. Ft3 Ft?, Lb* F2/Ft3 Space Dp, In-
... ... .. ..
88,000 133 236 '72 0.22
27,000 94 - 81 -
11,400 73 123 85 0.34
11,200 132 118 73 0.44
3,800 - - 86 -
7,300 66 112 86 0.40
7,000 120 106.5 75 0.50
3,340 52 81.7 89 0.46
3,140 94 70.6 80 0.58
1,430 39 62.2 92 0.56
1,310 71 35.2 86 0.70
730 62 49.3 87 0.7.5
373 49 39.2 90 0.90
163 37 29.3 92 1.1.5
55 25 19.8 95 -
74 35 29 93 -
64 30 25 94 -
...
*Based upon Carbon Steel Rings; other weights are: Stainless Steel 105%; Copper 120%; Aluminum 37%; Monel and Nickel 115%.
Csually metal Raschig rings are made viith fitted butted-joints.
Original by permission, M. Leva, [40] and U.S. Stoneware Co., Akron, OH.; updated 9/88 by permission of Norton Chemical Process Products Corp.,
Bull. MTP-I and TP-78.
Yote: Sizes availability varies with manufacturers.
**Usual commcrcial sizes
S = Square pattern
D = Diamond pattern } Stacked