Galvanizing is a widely used anti-corrosion process in which a layer of zinc is applied to the surface of iron or steel pipes. This zinc coating acts as a protective barrier against corrosion by sacrificing itself to protect the underlying metal—a process known as cathodic protection. Zinc helps to shield the pipe from moisture and oxygen in the environment, preventing rust formation. Additionally, it provides UV protection, reducing the risk of degradation from sunlight exposure.
In this article, we’ll explore the key advantages of galvanized pipes and outline common dimensional specifications.
Key Advantages of Galvanized Pipes
Why choose galvanized pipes over other options? Below are several compelling benefits that galvanized piping systems offer in terms of cost, durability, and efficiency:
1. Cost-Effective Corrosion Resistance
You might wonder, “Why not just use stainless steel if corrosion resistance is essential?” While stainless steel does inherently resist corrosion, it comes at a significantly higher cost. Galvanizing carbon steel offers a more affordable alternative with reliable protection, making it ideal for projects where budget constraints are a concern but durability is still required.
2. Superior Durability Compared to Basic Coatings
Other surface treatments, such as painting or epoxy coatings, may appear to be simpler solutions. However, these methods tend to wear out faster. They are prone to chipping, scratching, and flaking, especially under extreme temperature changes or physical stress. Once compromised, they expose the base metal to corrosion. In contrast, galvanized coatings form a strong metallurgical bond with the steel, offering long-lasting performance with minimal upkeep.
3. Reduced Labor and Maintenance Requirements
Once the galvanizing process is completed, the product is essentially ready for use, without requiring any additional surface preparation or coating. This saves considerable time during installation. Unlike painting, which involves surface cleaning, primer application, drying time, and touch-ups, galvanized pipes require no extra coating or routine reapplication. Your maintenance team will also spend less time inspecting for damage or performing surface repairs.
Galvanized Pipe Dimensions Sizes Chart(OD Chart)
|
DN |
O.D. |
W.T. |
|||||||||||||||
|
Inch |
mm |
SCH5S |
SCH10S |
SCH10 |
SCH20 |
SCH30 |
SCH40 |
SCH60 |
SCH80 |
SCH100 |
SCH120 |
SCH140 |
SCH160 |
Sth |
XS |
XXS |
|
|
50 |
2″ |
60.3 |
1.65 |
2.77 |
– |
– |
– |
3.91 |
– |
5.54 |
– |
– |
– |
8.74 |
3.91 |
5.54 |
11.07 |
|
65 |
2 1/2″ |
73 |
2.11 |
3.05 |
– |
– |
– |
5.16 |
– |
7.01 |
– |
– |
– |
9.53 |
5.16 |
7.01 |
14.02 |
|
80 |
3″ |
88.9 |
2.11 |
3.05 |
– |
– |
– |
5.49 |
– |
7.62 |
– |
– |
– |
11.13 |
5.49 |
7.52 |
15.24 |
|
90 |
3 1/2″ |
101.6 |
2.11 |
3.05 |
– |
– |
– |
5.74 |
– |
8.08 |
– |
– |
– |
– |
5.74 |
8.08 |
– |
|
100 |
4″ |
114.3 |
2.11 |
3.05 |
– |
– |
– |
6.02 |
– |
8.58 |
– |
11.13 |
– |
13.49 |
6.02 |
8.56 |
17.12 |
|
125 |
5″ |
141.3 |
2.77 |
3.4 |
– |
– |
– |
6.55 |
– |
9.53 |
– |
12.7 |
– |
15.88 |
6.55 |
9.53 |
18.05 |
|
150 |
6″ |
168.3 |
2.77 |
3.4 |
– |
– |
– |
7.11 |
– |
10.97 |
– |
14.27 |
– |
18.26 |
7.11 |
10.97 |
21.95 |
|
200 |
8″ |
219.1 |
2.77 |
3.76 |
– |
6.35 |
7.04 |
8.18 |
10.31 |
12.7 |
15.09 |
18.26 |
20.62 |
23.01 |
8.18 |
12.7 |
22.23 |
|
250 |
10″ |
273.1 |
3.4 |
4.19 |
– |
6.35 |
7.8 |
9.27 |
12.7 |
15.09 |
18.26 |
21.44 |
25.4 |
28.58 |
9.27 |
12.7 |
25.4 |
|
300 |
12″ |
323.9 |
3.96 |
4.57 |
– |
6.35 |
8.38 |
10.31 |
14.27 |
17.48 |
21.44 |
25.4 |
28.58 |
33.32 |
9.53 |
12.7 |
25.4 |
|
350 |
14″ |
355.5 |
3.96 |
4.78 |
6.35 |
7.92 |
9.53 |
11.13 |
15.09 |
19.05 |
23.83 |
27.79 |
31.75 |
35.71 |
9.53 |
12.7 |
– |
|
400 |
16″ |
406.4 |
4.19 |
4.78 |
6.35 |
7.92 |
9.53 |
12.7 |
16.66 |
21.44 |
26.19 |
30.96 |
36.53 |
40.49 |
9.53 |
12.7 |
– |
|
450 |
18″ |
457.2 |
4.19 |
4.78 |
6.35 |
7.92 |
11.13 |
14.27 |
19.05 |
23.83 |
39.36 |
34.93 |
39.67 |
45.24 |
– |
– |
– |
|
500 |
20″ |
508 |
4.78 |
5.54 |
6.35 |
9.53 |
12.7 |
15.09 |
20.62 |
26.19 |
32.54 |
38.1 |
44.45 |
50.01 |
– |
– |
– |
|
550 |
22″ |
558.8 |
4.78 |
5.54 |
6.35 |
9.53 |
12.7 |
– |
22.23 |
28.58 |
34.93 |
41.28 |
47.63 |
53.98 |
– |
– |
– |
|
600 |
24″ |
609.6 |
5.54 |
6.35 |
6.35 |
9.53 |
14.27 |
17.48 |
24.61 |
30.96 |
38.89 |
46.02 |
52.37 |
59.54 |
– |
– |
– |
For more: Steel Pipe Dimensions & Sizes Chart (Schedule 40, 80 Pipe) Means
