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GI Pipes

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GI Pipes

GI (Galvanized Iron) Pipes are steel pipes coated with a layer of zinc to prevent corrosion and rusting. These pipes are commonly used in water supply systems, structural applications, and outdoor installations where exposure to moisture and harsh environments is a concern. The zinc coating acts as a protective barrier, extending the lifespan of the pipes and making them more durable than regular mild steel pipes.

GI pipes are widely used in industries such as plumbing, agriculture, construction, and infrastructure due to their affordability, longevity, and resistance to environmental factors. They come in different thicknesses, sizes, and coatings, such as hot-dip galvanization or electro-galvanization, depending on the required level of corrosion protection.

GI pipes are an excellent choice for applications requiring durability and resistance to rust.
Pipes

Manufacturing Process of GI Pipes

  1. Hot-Dip Galvanization: The steel pipes are dipped in molten zinc, forming a thick and durable protective layer.
  2. Electro-Galvanization: A thin layer of zinc is applied using an electrochemical process, providing moderate corrosion resistance.

Properties of GI Pipes

  1. Corrosion Resistance: The zinc coating protects the pipe from rust and environmental damage.
  2. Durability: GI pipes have a longer lifespan compared to regular steel pipes, especially in outdoor conditions.
  3. Strength & Toughness: They offer good mechanical strength, making them suitable for load-bearing applications.
  4. Weldability: Can be welded, but special care is needed to avoid damaging the zinc coating.
  5. Weather Resistance: Can withstand exposure to water, humidity, and extreme weather conditions.
  6. Smooth Surface: Reduces friction in fluid transport applications, improving efficiency.
  7.  

Conclusion

GI pipes are an excellent choice for applications requiring durability and resistance to rust. Their protective zinc coating makes them ideal for plumbing, construction, and industrial uses, especially in environments with high moisture exposure. Although they have some limitations, proper installation and maintenance can extend their lifespan significantly.

Advantages:

  • Longer Lifespan: The galvanized coating protects against rust, increasing durability.
  • Cost-Effective: More affordable than stainless steel while offering good corrosion resistance.
  • Low Maintenance: Requires minimal upkeep due to its anti-corrosion properties.
  • Eco-Friendly & Recyclable: Can be recycled, making it a sustainable option.
Nominal Pipe Size
O/D
Schedule 10
Schedule 20
Schedule 30
Schedule STD
Schedule 40
Schedule 60
Schedule Extra Strong (XS)
Schedule 80
Schedule 120
Schedule 140
Schedule 160
Schedule Double Extra Strong
mm
inch
Mm
mm
Kg/m
mm
Kg/m
mm
Kg/m
Wall
wt.
Wall
wt.
Wall
wt.
Wall
wt.
Wall
wt.
Wall
wt.
Wall
wt.
Wall
wt.
Wall
wt.
Wall
wt.
z3
1-Aug
10.3
1.73
0.37
1.73
0.37
2.41
0.47
2.41
0.47
6
1-Apr
13.7
2.24
0.63
2.24
0.63
3.02
0.8
3.02
0.8
10
3-Aug
17.1
2.31
0.84
2.31
0.84
3.2
1.1
3.2
1.1
15
1-Feb
21.3
2.77
1.27
2.77
1.27
3.73
1.62
3.73
1.62
4.78
1.95
7.5
2.55
20
3-Apr
26.7
2.87
1.69
2.87
1.69
3.91
2.2
3.91
2.2
5.6
2.9
7.82
3.64
25
1
33.4
3.38
2.5
3.38
2.5
4.55
3.24
4.55
3.24
6.4
4.24
9
5.45
32
1.1/4
42.2
3.56
3.39
3.56
3.39
4.85
4.47
4.85
4.47
6.4
5.61
9.7
7.77
40
1.1/2
48.3
3.68
4.05
3.68
4.05
5.08
5.41
5.08
5.41
7.14
7.25
10.2
9.56
50
2
60.3
3.9
5.44
3.9
5.44
5.5
7.48
5.5
7.48
8.7
11.11
11.1
13.4
65
2.1/2
73/0
5.16
8.63
5.16
8.63
7
11.41
7
11.41
9.5
14.92
14
20.4
80
3
88.9
5.5
11.3
5.5
11.3
7.62
15.3
7.14
15.3
11.13
21.35
15.24
27.7
90
3.1/2
101.6
5.74
13.57
5.74
13.57
8.08
18.63
8.08
18.63
16.2
34.1
100
4
114.3
6.02
16.07
6.02
16.07
8.56
22.3
8.56
22.3
11.13
11.13
28.32
13.5
33.5
17.12
41.03
125
5
141.3
6.55
21.77
6.55
21.77
9.53
30.9
9.53
30.9
12.7
12.7
40.2
15.9
49.11
19
57.4
150
6
168.3
7.11
28.26
7.11
28.26
10.97
42.5
10.9
42.5
14.3
14.3
54.2
18.3
67.5
21.95
79.22
200
8
219.1
6.35
33.3
7
36.8
8.2
42.5
8.2
42.5
10.3
53.1
12.7
64.6
12.7
64.5
15.1
75.92
18.3
90.4
20.6
100.9
23
111.27
22.23
108
250
10
273
6.35
41.7
7.8
51.3
9.27
60.3
9.27
60.3
12.7
81.5
12.7
81.5
15.1
96
18.3
114.7
21.44
133
25.4
155
28.6
172.3
25.4
155
300
12
323.8
6.35
49.7
8.4
65.2
9.53
73.8
10.3
79.7
14.3
109
12.7
97.4
17.4
132
21.4
160
25.4
187
28.6
208
33.3
238.7
25.4
187
350
14
355.6
6.35
54.6
7.92
68.1
9.53
81.3
9.53
81.3
11.13
94.6
15.1
126.4
12.7
107
19
158
23.8
195
27.8
224
31.8
253.5
36.7
281
400
16
406.4
6.35
62.6
7.92
77.9
9.5
93.3
9.53
93.3
12.7
123
16.7
160
12.7
123
21.44
203
26.2
245
30.9
286
36.53
333
40.5
366
450
18
457.2
6.35
70.5
7.92
87.7
11.1
122
9.53
105
14.3
156
19.0c
206
12.7
130
23.8
254
21.4
310
34
363
39.7
408.3
45.2
459
500
20
508
6.35
78.5
9.53
117.2
12.7
155.1
9.53
117.2
15.1
183
20.6
248
12.7
155.1
26.2
311
32.5
381
38.1
441
44.4
508
50
564
550
22
558.8
6.35
86.4
9.53
129
12.7
171
9.53
129
22.2
294
12.7
171
28.6
373
34
451
41.3
526
47.6
600
54
672
600
24
600.5
6.35
94.5
9.53
141
14.3
210
9.53
141
17.4
255
24.5
355
12.87
187
30.9
442
38.8
547.7
46
640
52.4
720
59.5
808
650
26
660.4
7.92
127
12.7
203
9.53
153
202
12.7
A 106 Gr B  API - 5L - Gr B  A 33 Gr 6  A 335 P 5
700
28
711
7.92
137.4
12.7
218
15.8
292
9.53
165
218
12.7
A 106 Gr B  API - 5L - Gr B  A 33 Gr 6  A 335 P 5
750
30
762
7.92
147
12.7
234.6
15.8
292.6
9.53
176
234
12.7
A 106 Gr B  API - 5L - Gr B  A 33 Gr 6  A 335 P 5
800
32
812.8
7.92
157
12.7
250.6
15.8
312.5
9.53
188.2
364.9
251
12.7
A 106 Gr B  API - 5L - Gr B  A 33 Gr 6  A 335 P 5
850
34
863.6
7.92
167
12.7
282.4
15.8
351.7
9.53
200
17.5
420.4
266
12.7
A 106 Gr B  API - 5L - Gr B  A 33 Gr 6  A 335 P 5
900
36
914.4
7.92
176.6
12.7
282.4
15.8
352.2
9.53
212
19.1
282
12.7
A 106 Gr B  API - 5L - Gr B  A 33 Gr 6  A 335 P 5

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