1.Material and process of ms pipe and gi pipe
| Property | MS Pipe | GI Pipe |
| Base Material | Mild Steel (Carbon Content: 0.15-0.25%) | Mild Steel + Zinc Coating |
| Manufacturing Process | Welding or Seamless Methods. | Hot-Dip or Electro-Galvanizing |
| Surface | Uncoated (Prone to Rust) | Zinc-Coated (Corrosion-Resistant) |
The main component of both ms pipe and gi pipe material is mild steel. MS pipe is made of low-carbon steel material, while gi pipe is galvanized on the basis of steel, and its substrate is mainly made of carbon steel. So they have similar mechanical properties in terms of strength, toughness, and pressure resistance.
Mild Steel Pipe:
Manufactured through processes such as rolling and welding steel sheets or piercing solid steel billets, followed by hot or cold drawing.
Galvanize Steel Pipe:
GI pipe meaning coating zinc on ms pipes, which can be produced using the following methods:
- Hot-Dip Galvanizing (HDG): the mild steel pipe dipped in molten zinc (85-120µm coating).
- Pre galvanized steel pipe: Pre galvanized steel strip processed into steel pipe (10-30µm coating)
- Electro-Galvanizing: thinner zinc layer (5-15µm), less durable.
2. Main differences between ms pipe and gi pipe
| Feature | MS Pipe | GI Pipe |
| Corrosion Resistance | Low (Rusts quickly in moisture) | High (Zinc layer prevents rust) |
| Lifespan | 2-5 years (unprotected) | 5-15 years (depending on coating) |
| Weight | Slightly lighter (No zinc layer) | Heavier (Zinc adds weight) |
| Weldability | Easier to weld (No coating interference) | Requires zinc removal at weld points |
| Appearance | Dark gray / Black (Mill scale) | Shiny silver (Zinc-coated) |
| Cost | Cheaper (No coating process) | 20-40% more expensive (Due to galvanization) |
3. Ms And Gi Pipe Specification
There are similarities in size specifications between ms pipe and gi pipe. And in some standard systems, for pipes of the same nominal size, the size series of outer diameter and wall thickness are also relatively close, which facilitates selection and replacement in engineering design and construction
| Ms Pipe & Gi pipe Catalogue | ||||||
| Ms and Gi pipe Diameter | Standard Gi & Ms Pipe Wall Thickness Chart | |||||
| INCH | Outside Diameter | SCH 10WT | SCH 20WT | SCH 40WT | SCH 60WT | SCH 80WT |
| (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | |
| 1/4" | 13.7 | -- | -- | 2.24 | -- | 3.02 |
| 3/8" | 17.1 | -- | -- | 2.31 | -- | 3.2 |
| 1/2" | 21.3 | 2.11 | -- | 2.77 | -- | 3.73 |
| 3/4" | 26.7 | 2.11 | -- | 2.87 | -- | 3.91 |
| 1" | 33.4 | 2.77 | -- | 3.38 | -- | 4.55 |
| 1-1/4" | 42.2 | 2.77 | -- | 3.56 | -- | 4.85 |
| 1-1/2" | 48.3 | 2.77 | -- | 3.68 | -- | 5.08 |
| 2" | 60.3 | 2.77 | -- | 3.91 | -- | 5.54 |
| 2-1/2" | 73 | 3.05 | -- | 5.16 | -- | 7.01 |
| 3" | 88.9 | 3.05 | -- | 5.49 | -- | 7.62 |
| 3-1/2" | 101.6 | 3.05 | -- | 5.74 | -- | 8.08 |
| 4" | 114.3 | 3.05 | -- | 6.02 | -- | 8.56 |
| 5" | 141.3 | 3.4 | -- | 6.55 | -- | 9.53 |
| 6" | 168.3 | 3.4 | -- | 7.11 | -- | 10.97 |
| 8" | 219.1 | 3.76 | 6.35 | 8.18 | 10.31 | 12.7 |
| 10" | 273 | 4.19 | 6.35 | 9.27 | 12.7 | 15.09 |
| 12" | 323.8 | 4.57 | 6.35 | 10.31 | 14.27 | 17.48 |
| 14" | 355 | 6.35 | 7.92 | 11.13 | 15.09 | 19.05 |
| 16" | 406 | 6.35 | 7.92 | 12.7 | 16.66 | 21.44 |
| 18" | 457 | 6.35 | 7.92 | 14.27 | 19.05 | 23.83 |
| 20" | 508 | 6.35 | 9.53 | 15.09 | 20.62 | 26.19 |
| 22" | 559 | 6.35 | 9.53 | 22.23 | 28.58 | |
| 24" | 610 | 6.35 | 9.53 | 17.48 | 24.61 | 30.96 |
Youfa steel pipe is professional ms and gi pipe supplier of China. Welcome new and old customers inguiry us!
For more specifications of steel pipes, please contact us
4. Application of ms pipe and gi pipe
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MS Pipe
Mild steel pipe is commonly used in building structures such as brackets and frames, such as the roof trusses of factory buildings and the scaffolding of buildings. It can also be used to transport low - pressure fluids and gases, such as heating pipes and ventilation pipes. In addition, it is used in some fields where the requirement for corrosion resistance is not high.
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GI Pipe
Galvanize steel gi round pipe is widely used in water supply systems, including urban tap - water supply and building water supply and drainage pipelines. In agricultural irrigation, it is used to transport irrigation water. It is also commonly used in outdoor construction projects, such as rainwater pipes on building facades, outdoor gas pipelines, and some industrial pipelines with requirements for corrosion resistance.
5.Products You May Like
Youfa steel pipe is professional carbon steel pipe supplier of China. Welcome new and old customers inguiry us!
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