As per standards relevant to the product.
Indian Standards
: Specification IS : 1239 (Part-I) 1990
(Light, Medium & Heavy Series) Black & Galvanized,
Plain end/screwed and socketed.
Indian Standards
: Specification IS : 1161-1998 grade YST
- 210 and YST - 240.
Indian Standards
: Specification IS : 3601 - 1984 upto 168.3
mm OD and 7.1 mm wall thickness.
Indian Standards
: Specification IS : 4270 - 1992 ERW Steel
Tubes for water wells.
British
Standards : Specification BS : 1387 - 1985 (Light, Medium & Heavy
Series) black & galvanized, plain end/screwed and socketed.
British
Standards : Specification BS
: 1139 - 1990, Steel Tubes for mechanical
structural and general engineering purpose.
American
Standards : A53
JIS : G
3444 ALL GRADES
Kenya Standards
: KS259:1998
SPECIFICATIONS for BLACK & GALVANISED
STEEL PIPES conforming to IS:1239 (Part 1) 1990 equivalent
to BS 1387-1985
Nominal |
Class |
Outside
Diameter |
Thickness |
Calculated
Nominal Weight |
Sockets |
Bore
(NB) |
|
Min. |
Max. |
|
|
Plain
End |
Screwed
& Socketed
|
Min.
Od |
Min.
Lth |
|
L |
21.00 |
21.40 |
2.00 |
14 |
0.947 |
1056 |
0.956 |
1046 |
27.0 |
37.0 |
15 (1/2") |
M |
21.00 |
21.80 |
2.60 |
12 |
1.21 |
826 |
1.22 |
820 |
27.0 |
37.0 |
|
H |
21.00 |
21.80 |
3.20 |
10 |
1.44 |
694 |
1.45 |
690 |
27.0 |
37.0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
L |
26.40 |
26.90 |
2.30 |
13 |
1.38 |
725 |
1.39 |
719 |
32.5 |
39.0 |
20 (3/4") |
M |
26.50 |
27.30 |
2.60 |
12 |
1.56 |
641 |
1.57 |
637 |
32.5 |
39.0 |
|
H |
26.50 |
27.30 |
3.20 |
10 |
1.87 |
535 |
1.88 |
532 |
32.5 |
39.0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
L |
33.20 |
33.80 |
2.60 |
12 |
1.98 |
505 |
2.00 |
500 |
39.5 |
46.0 |
25 (1") |
M |
33.30 |
34.20 |
3.20 |
10 |
2.41 |
415 |
2.43 |
412 |
39.5 |
46.0 |
|
H |
33.30 |
34.20 |
4.00 |
8 |
2.93 |
341 |
2.95 |
339 |
39.5 |
46.0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
L |
41.90 |
42.50 |
2.60 |
12 |
2.54 |
394 |
2.57 |
389 |
49.0 |
51.0 |
32 (11/4") |
M |
42.00 |
42.90 |
3.20 |
10 |
3.10 |
322 |
3.13 |
319 |
49.0 |
51.0 |
|
H |
42.00 |
42.90 |
4.00 |
8 |
3.79 |
264 |
3.82 |
262 |
49.0 |
51.0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
L |
47.80 |
48.40 |
2.90 |
11 |
3.23 |
310 |
3.27 |
306 |
56.0 |
51.0 |
40 (11/4") |
M |
47.90 |
48.80 |
3.20 |
10 |
3.56 |
281 |
3.60 |
278 |
56.0 |
51.0 |
|
H |
47.90 |
48.80 |
4.00 |
8 |
4.37 |
229 |
4.41 |
227 |
56.0 |
51.0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
L |
59.60 |
60.20 |
2.90 |
11 |
4.08 |
245 |
4.15 |
241 |
68.0 |
60.0 |
50 (2") |
M |
59.70 |
60.80 |
3.60 |
9 |
5.03 |
199 |
5.10 |
196 |
68.0 |
60.0 |
|
H |
59.70 |
60.80 |
4.50 |
7 |
6.19 |
161 |
6.26 |
160 |
68.0 |
60.0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
L |
75.20 |
76.00 |
3.20 |
10 |
5.71 |
175 |
5.83 |
172 |
84.0 |
69.0 |
65 (2 1/2") |
M |
75.30 |
76.60 |
3.60 |
9 |
6.42 |
156 |
6.54 |
153 |
84.0 |
69.0 |
|
H |
75.30 |
76.60 |
4.50 |
7 |
7.93 |
126 |
8.05 |
124 |
84.0 |
69.0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
L |
87.90 |
88.70 |
3.20 |
10 |
6.72 |
149 |
6.89 |
145 |
98.0 |
75.0 |
80 (3") |
M |
88.00 |
89.50 |
4.00 |
8 |
8.36 |
120 |
8.53 |
117 |
98.0 |
75.0 |
|
H |
88.00 |
89.50 |
4.80 |
6 |
9.90 |
101 |
10.40 |
96 |
98.0 |
75.0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
L |
113.00 |
113.90 |
3.60 |
9 |
9.75 |
102 |
10.00 |
100 |
124.0 |
87.0 |
100 (4") |
M |
113.00 |
115.00 |
4.50 |
7 |
12.20 |
82 |
12.50 |
80 |
124.0 |
87.0 |
|
H |
113.00 |
115.00 |
5.40 |
5 |
14.50 |
69 |
14.80 |
68 |
124.0 |
87.0 |
|
|
|
|
|
|
|
|
|
|
|
|
125 (5") |
M |
138.50 |
140.80 |
4.80 |
6 |
15.90 |
63 |
16.40 |
61 |
151.0 |
96.0 |
|
H |
138.50 |
140.80 |
5.40 |
5 |
17.90 |
56 |
18.40 |
54 |
151.0 |
96.0 |
|
|
|
|
|
|
|
|
|
|
|
|
150 (6") |
M |
163.90 |
166.50 |
4.80 |
6 |
18.90 |
53 |
19.50 |
51 |
178.0 |
96.0 |
|
H |
163.90 |
166.50 |
5.40 |
5 |
21.30 |
47 |
21.90 |
46 |
178.0 |
96.0 |
TOLERANCES AS PER IS
| A. Thickness |
Tolerance |
B. Weight |
Tolerance |
C. Length |
| 1. Light tubes |
+ Not Limited
-8% |
1. Single tube
(Light Series) |
+10%
-8% |
Light, Medium & Heavy tubes
Random Lengths of 4 to 7 metres unless specified otherwise |
2. Medium and
Heavy tubes |
+Not Limited
-10% |
2. Single tube
Medium & Heavy Series |
±10% |
|
| |
|
3. For quantities per load of 10 tonnes
min.
(Light Series) |
±5% |
|
| |
|
4. For quantities per load of 10 tonnes
min.
(medium & Heavy Series |
± 7.5% |
|
TOLERANCES AS PER BS
| A. Thickness |
Tolerance |
B. Weight |
Tolerance |
C. Length |
| 1. Light tubes |
+ Not Limited
-8% |
1. Single tube
(Light Series) |
+10%
-8% |
Light, Medium & Heavy tubes
Random Lengths of 4 to 7 metres unless specified otherwise |
2. Medium and
Heavy tubes |
+Not Limited
-10% |
2. Single tube
Medium & Heavy Series |
±10% |
|
For quantity of 150mtr.
and above of one size shall not deviate by
more than ±4%
|
STEEL
TUBES for structural purposes conforming to IS:1161/1998
equivalent to BS: 1139/1990
Physical
Properties
Grade
Y-S (min)/Mpa (Kg/mm2)
T.S. (min)/Mpa (Kg/mm2)
Percentage Elongation
Grade
Y-S (min)/Mpa (Kg/mm2)
T.S.(min)/Mpa (Kg/mm2)
Percentage Elongation |
YST-210
210(21.42)
330 (33.66)
20
YST-240
240 (24.48)
410 (41.82)
17 |
Note: For tubes sizes upto
and including 25mm NB, elongation of 12% shall be permissible.
TOLERANCES
-
Outside
diameter
Upto & including 48.3mm
Over 48.3 mm
|
+ 0.4 mm
- 0.8 mm
± 1% |
- Thickness
|
+ Not Limited
-10% |
- Weight
Single Tube (Light Class)
Single Tube (Medium & Heavy)
|
+ 10%, -8%
± 10% |
For quantities per load of 10 Tonnes Min. (Light)
|
± 5% |
For quantities per load of 10 Tonnes Min. (Medium
& Heavy)
|
± 7.5% |
N.B. |
Series |
Outside
Diameter |
Thickness |
Nominal
Weight
Black Tubes
Plain End |
|
|
Mm |
Mm |
Kg/mtr |
Mtr/tone |
15 |
L
M
H |
21.3 |
2.00
2.60
3.20 |
0.947
1.21
1.44 |
1056
826
694 |
20 |
L
M
H |
26.9 |
2.30
2.60
3.20 |
1.38
1.56
1.87 |
725
641
535 |
25 |
L
M
H |
33.7 |
2.60
3.20
4.00 |
1.98
2.41
2.93 |
505
415
341 |
32 |
L
M
H |
42.4 |
2.60
3.20
4.00 |
2.54
3.10
3.79 |
394
322
264 |
40 |
L
M
H |
48.3 |
2.90
3.20
4.00 |
3.23
3.56
4.37 |
310
281
229 |
50 |
L
M
H |
60.3 |
2.90
3.20
3.60
4.50 |
4.08
4.57
5.03
6.19 |
242
219
196
162 |
65 |
L
M
H |
76.1 |
3.20
3.60
4.00 |
5.71
6.42
7.93 |
171
153
126 |
80 |
L
M
H |
88.9 |
3.20
4.00
4.80 |
6.72
8.36
9.90 |
146
118
99 |
100 |
L
M
H |
114.3 |
3.60
4.50
5.40 |
9.75
12.20
14.50 |
100
83
69 |
125 |
L
M
H |
139.7 |
4.50
4.80
5.40 |
15.00
15.90
17.90 |
67
62
56 |
150 |
L
M
H |
165.1 |
4.50
4.80
5.40 |
17.80
18.90
21.30 |
56
52
47 |
150 |
L
M
H |
168.3 |
4.50
4.80
5.40
6.30 |
18.20
19.40
21.70
25.20 |
55
51
46
40 |
200 |
L
M
H |
219.1 |
4.80
5.60
5.90 |
25.40
29.50
31.00 |
39
34
32 |
