what is gi pipe

GI pipe full form is galvanized iron. Galvanized iron GI pipe is a type of pipe made of mild steel that has been coated with a layer of zinc. The zinc coating prevents corrosion on the steel, enhancing the durability and longevity of the pipe.

GI pipes are commonly used for a variety of applications

·      Water and sewage pipes

·      Electrical poles

·      Structural purposes

·      Engineering purposes

·      Automotive purposes

·      Oil and gas transmissions

GI pipes are typically available in a variety of sizes and thicknesses. The thickness of the zinc coating will vary depending on the application. For example, pipes that will be used for carrying water will typically have a thicker zinc coating than pipes that will be used for electrical purposes. You can check the hsn code of gi pipe here.

Advantages of GI pipe

Corrosion resistance: The zinc coating on GI pipes protects the steel from corrosion, making the pipe more durable and long-lasting. This is especially important for pipes that will be exposed to harsh environments, such as those that are exposed to water, chemicals, or salt.

Strength and durability: GI pipes are strong and durable, making them a good choice for applications where the pipe will be subjected to a lot of wear and tear. For example, GI pipes are often used for water and sewage pipes, which are constantly being exposed to water and dirt.

Lightweight and easy to transport: Because GI pipes are lightweight, they are simple to carry and install. This is a major advantage for applications where the pipes will need to be moved around frequently, such as in construction projects.

Relatively inexpensive: GI pipes are a cost-effective solution for a range of applications because of their low cost.

Disadvantages of GI pipes

Not as strong as some other types of pipes: GI pipes are not as strong as some other types of pipes, such
as stainless steel pipes. This means that they may not be suitable for applications where the pipe will be subjected to a lot of stress, such as high-pressure water lines.

Can be more difficult to weld than some other types of pipes: The zinc coating on GI pipes can make it more difficult to weld the pipes. This is because the zinc can vaporize during the welding process, which can create defects in the weld.

Zinc coating can eventually wear off: The zinc coating on GI pipes can eventually wear off, exposing the steel to corrosion. This is especially likely to happen in areas where the pipe is exposed to harsh environments, such as those that are exposed to water, chemicals, or salt.

Overall, GI pipes are a versatile and cost-effective option for a variety of applications. They are corrosion-resistant, strong, and lightweight, making them a good choice for applications where durability and longevity are important.

Here is a table comparing GI pipes to MS pipes

Feature	GI Pipe	MS Pipe
Material	Mild steel with zinc coating	Mild steel
Corrosion resistance	Good	Fair
Strength	Good	Excellent
Weight	Light	Heavy
Cost	Inexpensive	More expensive
Applications	Water, sewage, electrical, structural, engineering, automotive, oil and gas	General purpose

 

As you can see, GI pipes are more corrosion-resistant than MS pipes, but they are not as strong. GI pipes are also lighter and less expensive than MS pipes. The best type of pipe for your application will depend on the specific requirements.

GI pipe sizes

Nominal Bore (NB): This is the size of the pipe in inches. For example, a 2″ NB pipe has an inside diameter of 1.969 inches.

Outside Diameter (OD): This is the size of the pipe around the outside. For example, a 2″ NB pipe has an outside diameter of 2.375 inches.

Wall Thickness (WT): This is the thickness of the pipe wall. For example, a 2″ NB pipe with a WT of 1.2mm has a wall thickness of 0.047 inches.

Here is a table of some common GI pipe sizes

 

Please note that these are just some of the most common GI pipes sizes. There are many other sizes available, so it is important to check with your supplier to see what sizes they have in stock.

GI pipe weight chart

(NB)	Outside Diameter (OD)	Wall Thick (WT)	Weight per Meter (Kg/m)
1/2″	1.025″	0.049″	0.78
1″	1.315″	0.059″	1.22
1.5″	1.610″	0.069″	1.82
2″	2.375″	0.083″	2.82
3″	3.375″	0.109″	5.27
4″	4.500″	0.138″	9.57
6″	6.625″	0.190″	21.33