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    High Pressure & Temperature Applications
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Technical Info
 

Pipe Data
Wall Thickness
NominalBore 7" NB 193.7 mm OD
NominalBore 8" NB 219.1 mm OD
NominalBore 10" NB 273 mm OD
NominalBore 12" NB 323.7 mm OD
NominalBore 14" NB 355.6 mm OD
NominalBore 16" NB 406.4 mm OD
NominalBore 18" NB 457mm OD
NominalBore 20" NB 508 mm OD
mm
Kg/mtr
Kg/mtr
Kg/mtr
Kg/mtr
Kg/mtr
Kg/mtr
Kg/mtr
Kg/mtr
4.85
22.59
25.62
32.07
38.13
-
-
-
-
5.20
24.17
27.43
34.34
40.85
-
-
-
-
5.60
26.00
29.28
36.93
43.93
48.11
-
-
  
6.00
27.88
31.53
39.50
47.02
51.49
61.00
69.00
-
6.35
29.34
33.28
41.73
49.67
54.43
62.35
70.50
78.50
7.01
32.77
36.76
46.43
55.45
61.82
69.04
-
-
7.94
-
41.00
50.95
61.85
67.98
77.94
87.80
-
8.18
-
42.56
53.42
65.12
-
-
-
-
9.53
-
51.50
60.24
73.75
81.21
93.13
105.00
117.00
12.70
-
-
-
-
107.28
123.30
139.00
155.00
Tolerance on Thickness and Weight : as per IS 1239 The following manufacturing tolerance shall be permitted on the tubes and sockets.
MAXIMUM PERMISSIBLE PRESSURE AND TEMPERATE FOR TUBES WITH STEEL COUPLINGS OR SCREWED AND SOCKETED JOINTS
(a) Thickness
(1) Butt welded Light tubes +Not limited
- 8 percent
  Medium and Heavy tubes + Not Limited                                                       
- 10 percent
(2) Seamless Tubes  +Not Limited
- 12.5 percent
 
(b) Weight :
(1) Single tube (light series)  +10 percent
- 8 percent
(2) Single tube
(medium & heavy Series)		 +10 percent
Nominal Bore mm
Maximum Permissible Pressure N/mm2
Kg./cm2
Maximum PermissibleTempreature 0C
Up to and Including 25 mm
1.20
12.24
260
Over 25 mm up to and Including 40 mm
1.03
10.50
260
Over 40 mm up to and Including 80 mm
0.86
8.77
260
Over 80 mm up to and Including 100 mm
0.69
7.04
260
 
0.83
8.77
177
Over 100 mm up to and Including 125 mm
0.69
7.04
171
Over 125 mm up to and Including 150 mm
0.50
5.10
160
For tubes fitted with appropriate flanges of suitably butt welded together,
the Max, permissible pressure shall be 21.00 Kg/cm2 and Max. permissible temp. 260 C

 
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