Document 0gzMGw7NZK37mDE1M16xbrkox
634
CHAPTER 27
1956 Guide &
Table 9. Dimensions of Flanged Cast-Ibon Elbows, Double.Bbanch Elbows, Tees, Crosses, Laterals, True Y's (Straight Sizes),
and Reducers (Class 125)
Pipe, Fittings, Welding
636'
tight joints, a gasket is.usually inserted between the contact faces' of the' flanges. The flange bolts then draw the faces up so tight that the gasket' deforms into the face imperfections and thereby provides a tight joint.
Gaskets are made of numerous materials, such as cork, paper, fiber, asbestos, metal (iron, steel, copper, etc.), and combinations of metal and some soft material. The proper gasket material to use depends upon the service of the pipe. The material should not be detrimentally affected by the chemical and thermal conditions of the fluid being carried.
Table 10. Dimensions of Steel Butt-Weldino Fittings
Nom
inal
Pipe Size
Inside Diam
op
Fit
tings
' Center .
to Face
90 Deg
Elbow
i
Tees,
Crosses-
.IjQNG
True Y Arip. Radius
Double
Elbow
Branch;':
Elbow -
A
Center to Face
45 Deo Elbow
Cen
ter to
Face Lat
eral
Short Center to Face
True Y AND
Lateral
Face Re
ducer
'C
1 194 194 2 2>4
3 394 4 5 6
8 10 12 HOD 16 OD
18 OD 20 OD 24 OD 30 OD 38 OD 42 OD 48 OD
1 in m 2 m
3 3M 4 5 6
8 10 12 14 16
18 20 24 30 36 42 48
3H 3M 4 494 5
594 6 694 794 " 8
9 11 12 14 15
1694 18 22 25 28* 31* 34*
5 594 6
m
7
794
8g94
1094 1194 v
14
115694
2194 24
2694 29 34 4194 49 5694 64
194 2 2 94 294 3
3 394. . "A 494 5
594 694 794 794
894 994 11 15 18 21 24
594 694 7 8 994
io' im
.12 .1394
'uy>
1794 2094 2494 27' 30
32 35 4094 49
194 194 2 294 294
3 3 3 394 394
494 : 5 594 6 694
9 10
5 594
694 7' 8 9 ..
11
12 14 16 18
19 20 24 30 36 42 48
All dimensions given are in inches. * Does not apply to true Y's or double-flanged elbows.
Thick ness Wall op Thick-
Flange
(Min)
4 >4 4H 5
9944.. 94o
94
M
94e
94 94
Me 94
794 894 9
10 11
1394 16 19 21 2394
25 2794 32 3894 46 53 5994
94 M `94 , SM
m
We m
119M4
lMe 1W
194 294 294 294 294
94 94 94 94 94
94 94 >94 94 1
194 194 W 194
119W4,
2
, ASA B16.1-W8.
higher pressures. They include: male and female face (an insert type face), tongue-and-groove (an adaptation of the male and female type), lapped pipe to flange, lapped pipe to pipe, and ring and groove using neck
flanges. As it is too expensive to machine flange faces sufficiently to provide water-
Long Radiub Elbows
180-Deg Returns
Straight Tees
Nominal
Center-to-End
Diameter at Bevel - ElbowB
A
Elbows B
f'tonfar
Diameter to-Center
at Bevel
O
Face K
Diameter at Bevel
Center-to-End
Run C
Outlet. M
n1
1.315
1M
194
1.660
194
1
1.315
3
294
1.315
194
1.660 3 294
1.660
194
194 194
194
1.900
2H
194 1.900
394 1.900
2
m2
294 3 394
2.375
2.875 3.500 4.000
3 394 i 4H 2 594 . 294
2.375 2.875 3.500 4.000
6
7M 9 1094
494
594 694 7W
2.375 2.875
3.500 4.000
294. 3
394 394
. 294 3
394 394
4.500
6
2W
4.500
12
8H
4.500
4M
4J4
m5 5.563
3H
5.563
15
1094
5.563
494
494
6.625
9
394
6.625
18
1294
6.625
594
594
8.625
12
5
8.625
24
1694
8.625
7
7
10.750
15
694 10.750 30
2094
10.750
894
894
12.750
18
794 12.750: 36
2494
12.750
10
10
14
14.000
21
894 14.000 42
28
14.000
n
16.000
24
10
16.000
48
32
16.000
12
Not
18.000 20.000
27 30
UK 18.000 54 1294 20.000 60
36 40
18.000 20.000
1394 15
24.000
36.
15
.24.000
72
48
24.000
17
From American Standard for Steel Butt-Welding Fittinga, ASA B18.9-1951. AU dimensions are in incites. Dimension A is equal to 94 of dimension O'.
VALVES
Valves are made with the same end connections as fittings. A brief description of each type follows.
* tungea anas: ivaaae in sizes irom ^ in. up. used wuenever line fittings are jk&ged and if frequent removal is contemplated. Flanged valves facilitate installa tion when large sizes are used.
2. Screwed Ends: Most common type end. Can be used for all pressures. Usually confined to smaller size because of difficulty in making large screwed joints.
Welding Ends: Available in steel only. Generally employed for high tempera ture--high pressure work. Difficult to disassemble in a welded line. This type in-