Pipes
Seamless Pipes
Seamless pipes are in accordance with EEMUA–144. They are manufactured from hot extruded shells followed by cold work
and annealing.
Welded Pipes
Longitudinally welded pipes are in accordance with
EEMUA–144. They are manufactured from hot rolled or cold rolled and
annealed sheet or plates in accordance with BS 2870, BS 2875, ASTM B171 or ASTM
B402. Mechanical testing is carried out in accordance with the standards above.
The pipes are supplied in “as welded” condition.
Dimensions
Dimensions are based on EEMUA –144. However, the
pipe diameters range from ½ in./16 mm to 36 in./914 mm. Although the pipe dimensions
of 38 in./965 mm and 40 in./1016 mm are not included in the EEMUA 144 – 1987
they are available on request as they are commonly specified. The corresponding
wall thicknesses of the pipes comply with the pressure containment requirements
of ASME B31.3 as well as the requirements of the International Association of Classification
Societies. Pipes with other wall thicknesses are available on request.
Tolerances
See notes 1-4 for seamless and notes 2-4 for welded
pipes.
Weld
Preparation
For wall thickness less than 3 mm, the pipes are supplied
with plain weld ends. Larger thicknesses are supplied with the weld bevel of 37
½°±2 ½°.
|
Size
Nominal (in)
|
Size
Specified (mm)
|
Specified Wall Thickness (mm)
|
Theoretical Weight/Meter (kg)
|
||
|
16 bar
|
20 bar
|
16 bar
|
20 bar
|
||
|
½
|
16
|
2.0
|
2.0
|
0.78
|
0.78
|
|
¾
|
25
|
2.0
|
2.0
|
1.29
|
1.29
|
|
1
|
30
|
2.5
|
2.5
|
1.93
|
1.93
|
|
1¼
|
38
|
2.5
|
2.5
|
2.49
|
2.49
|
|
1½
|
44.5
|
2.5
|
2.5
|
2.94
|
2.94
|
|
2
|
57
|
2.5
|
2.5
|
3.82
|
3.82
|
|
2½
|
76.1
|
2.5
|
2.5
|
5.15
|
5.15
|
|
3
|
88.9
|
2.5
|
2.5
|
6.05
|
6.05
|
|
4
|
108
|
3.0
|
3.0
|
8.82
|
8.82
|
|
6
|
159
|
3.0
|
3.5
|
13.10
|
15.24
|
|
8
|
219.1
|
4.0
|
4.5
|
24.10
|
27.04
|
|
10
|
267
|
4.5
|
5.5
|
33.10
|
40.27
|
|
12
|
323.9
|
5.5
|
7.0
|
49.05
|
62.10
|
|
14
|
368
|
6.5
|
8.0
|
65.80
|
80.64
|
|
16
|
419
|
7.0
|
9.0
|
80.75
|
103.32
|
|
Size
Nominal (in)
|
Size
Specified (mm)
|
Specified Wall Thickness (mm)
|
Theoretical Weight/Meter (kg)
|
||
|
16 bar
|
20 bar
|
16 bar
|
20 bar
|
||
|
16
|
419
|
9.0
|
103.32
|
||
|
18
|
457.2
|
8.0
|
9.5
|
100.62
|
119.10
|
|
20
|
508
|
8.5
|
11.0
|
118.90
|
153.10
|
|
24
|
610
|
10.5
|
13.0
|
176.30
|
217.30
|
|
28
|
711
|
12.0
|
15.0
|
234.90
|
292.21
|
|
32
|
813
|
13.5
|
17.0
|
302.20
|
378.76
|
|
36
|
914
|
15.5
|
19.0
|
390.00
|
475.97
|
Note 1
The pipe sizes up to including 4 in./108 mm are based
on BS 2871: Part 2: Table 3 for outside diameters and their tolerances to allow
for the use of capillary and compression fittings and brazed (and welded)
slip-on flanges. The wall thickness of the 16 bar range have been increased to
match the 20 bar range for mechanical strength.
Note 2
The pipe size 6 in./159 mm up to 16 in./419 mm are
also based on BS 2871: Part 2: Table 3 for specified diameters but the
tolerance have been applied to the inside diameters for facilitate alignment of
matching weld preparations.
Note 3
The ovality of the finished pipe doesn't exceed 2% of
the difference of the maximum and minimum diameter measured on the same cross
section.
Note 4
Up to including 4 in./108 mm, the wall thickness doesn't vary by more than 10 % specified therein. For diameters from 6in./159 mm and
larger, the wall thickness is not less than 12.5 % of the specified value.
The pipes with other dimensions than mentioned herein
are available on request. Please contact us for more information.
