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Figure 6
Figure 7
Installation - Alignment
(cont.)
Thin Wall Stainless Steel Pipe and
Tubing
Thin wall stainless steel pipe has a larger I.D. than schedule 40
pipe. Check your pipe dimensions and install as shown. Use
gaskets with unlined valves.
Maximum allowable line pressure for the lined valve installation
shown is 60 psi. For higher line pressures use socket weld
flanges or use spacer rings identical to the ones used with O.D.
Tubing. (See Table 3)
Lightweight Stainless Pipe
Size (in.)
Schedule 10S I.D.
(in.)
Schedule 5S I.D.
(in.)
2
2.157
2.245
3
3.260
3.334
4
4.260
4.334
6
6.357
6.407
8
8.329
8.407
10
10.420
10.482
12
12.390
12.438
Table 2
O.D. Tubing 3” and Larger
(recommended by TAPPI)
This thin wall tubing O.D. is nominal size. Example: 6” tubing is
6” O.D. Gasket I.D. should be valve body bore + 1/4”. (See Table
1) 3” tubing as shown in Table 3 does not require spacers.
O.D. Tube System - Thin Wall
Working
Pressure
Pipe
Spacer Ring
Size
(in.)
I.D.
(in.)
O.D.
(in.)
I.D.
(in.)
T (in.)
125 lb
WP
3
2.870
-
-
-
4
3.870
6
3/4
4
1/32
1/4
6
5.870
8
5/8
16
1/16
3/8
8
7.870 10
7/8
8
1/2
10
9.870 13
3/4
10
3/4
12
11.844
16
12
5/8
250 lb
WP
3
2.870
-
-
-
4
3.870
7
14
1/32
1/4
6
5.844
9
3/4
6
1/16
3/8
8
7.782
12
8
5/8
10
9.750 14
1/8
10
7/8
12
11.720 16
1/2
12
3/4
Table 3
