When
steel pipe is forged, a black oxide scale forms on its surface to give it the
finish which is seen on this type of pipe. Because steel is subject to rust and
corrosion, the factory also coats it with protective oil. Those black steel are
used for manufacturing pipe and tube, which will not rust for a long time and
requires very little maintenance. It is sold in standard 21-foot lengths
TBE.
Black steel pipes and tubing are cut and threaded to fit the job.
Fittings for this type of pipe are of black malleable (soft) cast iron. They
connect by screwing onto the threaded pipe, after applying a small amount of
pipe joint compound on the threads. Larger diameter pipe is welded rather than
threaded. Black steel pipe is cut either with a heavy-duty tube cutter or cutoff
saw or by hacksaw.
Widely applicable for ordinary uses in water, gas, air
and steam, black steel pipes and tube are utilized for gas distribution inside
and outside the house and for hot water circulation in boiler systems. It is
also used for line pipes in oil and petroleum industries, for water wells and
for water, gas and sewage purposes. It is not used for potable water or for
drain waste or vent lines.
For Water, Gas and Sewage
Confirming to IS :
3589/1991
| Size |
Outside |
Wall |
Calculated Weight (Plain
end) |
| N.B. mm |
Diameter mm |
Thickness |
Kg./m |
M/Tone (Appr.) |
| 150 |
168.3 |
4.8 |
19.3 |
52 |
| |
|
5.0 |
20.1 |
50 |
| |
|
5.4 |
21.7 |
46 |
| |
|
6.0 |
24.0 |
41.5 |
| |
|
6.4 |
25.5 |
39 |
| |
|
7.0 |
27.8 |
36 |
| |
|
8.0 |
31.6 |
31.5 |
| 175 |
193.7 |
4.8 |
22.6 |
44 |
| |
|
5.0 |
23.3 |
43 |
| |
|
5.4 |
25.1 |
40 |
| |
|
6.0 |
27.8 |
36 |
| |
|
6.4 |
29.6 |
34 |
| |
|
7.0 |
32.2 |
31 |
| |
|
8.0 |
36.6 |
27.5 |
| |
|
9.5 |
43.2 |
23 |
| 200 |
219.1 |
4.3 |
22.8 |
44 |
| |
|
4.8 |
25.6 |
39 |
| |
|
5.0 |
26.4 |
38 |
| |
|
5.4 |
28.5 |
33 |
| |
|
6.0 |
31.5 |
31.5 |
| |
|
6.4 |
33.6 |
30 |
| |
|
7.0 |
36.6 |
27 |
| |
|
8.0 |
41.6 |
24 |
| |
|
9.5 |
49.1 |
20.5 |
| 250 |
273 |
4.3 |
28.5 |
35 |
| |
|
4.8 |
32.1 |
31 |
| |
|
5.0 |
33.0 |
30.5 |
| |
|
5.4 |
35.6 |
28 |
| |
|
6.0 |
39.5 |
25.5 |
| |
|
6.4 |
42.1 |
24 |
| |
|
7.0 |
45.9 |
22 |
| |
|
8.0 |
52.3 |
19 |
| |
|
9.5 |
61.7 |
16 |
| 300 |
323.9 |
4.8 |
38.2 |
26 |
| |
|
5.0 |
39.3 |
25.5 |
| |
|
5.4 |
42.4 |
23.5 |
| |
|
6.0 |
47.0 |
21.5 |
| |
|
6.4 |
50.1 |
20 |
| |
|
7.0 |
54.7 |
18.5 |
| |
|
8.0 |
62.3 |
16 |
| |
|
9.5 |
73.7 |
13.5 |
| 350 |
355.6 |
5.6 |
48.3 |
21 |
| |
|
6.0 |
51.7 |
19 |
| |
|
6.4 |
55.1 |
18 |
| |
|
7.0 |
60.2 |
16.5 |
| |
|
8.0 |
68.6 |
14.5 |
| |
|
9.5 |
|
|
| 400 |
406.4 |
5.6 |
55.3 |
18 |
| |
|
6.0 |
59.2 |
17 |
| |
|
6.4 |
63.1 |
16 |
| |
|
7.0 |
68.9 |
14.5 |
| |
|
8.0 |
78.6 |
13 |
| |
|
9.5 |
93.0 |
11 |
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