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Specifications
Surya has a wide range of pipes conforming to the following
national and international specifications that
incorporate latest amendments.
Destructive & Non destructive Testing
Hydrostatie Testing
NDT 100%
of pipe shall be tested at a pressure specified in above
table
PSL-1 Weld
seam of each pipe shall be tested by online Eddy Current
Test
PSL-2 Steel
skelp and weld seam shall be tested by Ultrasoinc Test
(after hydrotest)
Flattening
For pipes over size 2.875"
1. Flatten upto 1/2 of OD (no crack in weld)
2. Flatten upto 1/3 of OD (no cracks or breaks other
than in weld)
3. Full Flattening ( no Lamination or burnt metal)
Reverse Bend Test as
per API 5L or Customer Specification to determine strength
of weld
Metallography
Micro Structure and Micro Hardness (HV10) test are carried
out
Impact Testing For
PSL-2 Pipes only (at O°C) Min value for one sample
= 22 J,
Min Avg.value of 3 samples = 27 J
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TECHNICAL DATA OF PIPES CONFORMING TO ASTM A-53
GR.A & B SCH. 40
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|
NPS Desiqnator |
DN Desiqnator |
Outside Diameter |
Wall Thickness |
Mass of Plain end Pipe |
Test Pressure |
|
|
|
|
|
|
|
|
|
Grade A |
Grade B |
|
|
|
inch |
mm |
inch |
mm |
Kg/Mtr |
lb/ft |
Mpa |
Mpa |
|
1/2 |
15 |
0.840 |
21.3 |
0.109 |
2.77 |
1.27 |
0.85 |
4.8 |
4.8 |
|
3/4 |
20 |
1.050 |
26.7 |
0.113 |
2.87 |
1.69 |
1.13 |
4.8 |
4.8 |
|
1 |
25 |
1.315 |
33.4 |
0.133 |
3.38 |
2.50 |
1.68 |
4.8 |
4.8 |
|
1 1/4 |
32 |
1.660 |
42.2 |
0.140 |
3.56 |
3.39 |
2.27 |
8.3 |
9.0 |
|
1 1/2 |
40 |
1.900 |
48.3 |
0.145 |
3.68 |
4.05 |
2.72 |
8.3 |
9.0 |
|
2 |
50 |
2.375 |
60.3 |
0.154 |
3.91 |
5.44 |
3.66 |
15.9 |
17.2 |
|
2 1/2 |
65 |
2.875 |
73.0 |
0.203 |
'5.16 |
8.63 |
5.80 |
17.2 |
17.2 |
|
3 |
80 |
3.500 |
88.9 |
0.216 |
5.49 |
11.29 |
7.58 |
15.3 |
17.2 |
|
3 1/2 |
90 |
4.000 |
101.6 |
0.226 |
5.74 |
13.57 |
9.12 |
14.0 |
16.3 |
|
4 |
100 |
4.500 |
114.3 |
0.237 |
6.02 |
16.07 |
10.80 |
13.1 |
15.2 |
|
5 |
125 |
5.563 |
141.3 |
0.258 |
6.55 |
21.77 |
14.63 |
11.5 |
13.4 |
|
6 |
150 |
6.625 |
168.3 |
0.280 |
7.11 |
28.26 |
18.99 |
10.5 |
12.3 |
|
8 |
200 |
8.625. |
219.1 |
0.322 |
8.18 |
42.55 |
28.58 |
9.2 |
10.8 |
|
10 |
250 |
10.750 |
273.0 |
0.365 |
9.27 |
60.29 |
40.52 |
8.4 |
9.9 |
|
12 |
300 |
12.750 |
323.8 |
0.406 |
10.31 |
79.70 |
53.57 |
7.9 |
9.2 |
|
14 |
350 |
14.000 |
355.6 |
0.438 |
11.13 |
94.55 |
63.50 |
7.8 |
9.0 |
|
16 |
400 |
16.000 |
406.4 |
0.500 |
12.7 |
123.30 |
82.85 |
7.7 |
9.0 |
Tolrances
Outside Diameter Pipe
Size upto & including ON 40 +1-
0.4 mm
Pipe
size ON 50 or large +1-
1 %
Thickness
-12.5% (max)
Weight
+1-10%
Testing
Online NDT For
Pipes NPS 2 (ON 50) or larger
Weld
seam of each pipe shall be tested by Eddy CurrentTest
Bend Test For
pipes upto & including ON 50
Bending
angle90°
Bending radius12 times to the 00 ofTube (no crack in
body & weld)
FlatteningFor pipes over ON 50
1. Flatten upto 2/3 of 00 for ductility of weld
2. Flatten upto 1/3 of 00 for ductility of steel
3. Full Flattening for testing of lamination
Mechanical Properties
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Grade A |
Grade2 |
| Yield Strength |
205 Mpa (Min) |
240 Mpa (Min) |
| Tensile Strength |
330 Mpa (Min) |
415 Mpa (Min) |
| Elongation |
As per ASTM A-53 |
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Chemical Properties
Composition, Max. %
|
Carbon |
Manga
nese |
Phos
phours |
Sul
phur |
Copper |
Nickel |
Chro
mium |
Molyb
denum |
Vana
dium |
| Grade A |
0.25 |
0.95 |
0.05 |
0.045 |
0.5 |
0.4 |
0.4 |
0.15 |
0.08 |
| Grade B |
0.3 |
1.2 |
0.05 |
0.045 |
0.5 |
0.4 |
0.4 |
0.15 |
0.08 |
Cu + Ni + Cr + Mb + V _ 1 %
Galvanizing
Minimum 0.490 Kg/Sq Mtr
Average 0.550 Kg/Sq Mtr
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