What is Galvanizing?
Galvanizing, or galvanization, is a manufacturing process where a coating of zinc is applied to steel or iron to offer protection and prevent rusting. There are several galvanizing processes available, but the most commonly offered and used method is called hot-dip galvanizing.
Galvanized steelis among the most popular steel types because of its extended durability, having the strength and formability of steel plus the corrosion protection of the zinc-iron coating. The zinc protects the base metal by acting as a barrier to corrosive elements, and the sacrificial nature of the coating results in a long-lasting and high-quality steel product.
This versatility makes it applicable to a variety of projects and industries, including agriculture, solar, automotive, construction, and so on. Below, we aim to provide a comprehensive description of how galvanized steel is processed, different galvanization methods, its benefits, and how it is used in these various industries.
The steps in the galvanizing process are as follows:
Hot-Dip Galvanizing
The first and foremost method for galvanization is hot-dip galvanizing. The process is very similar to what the name suggests! In this method, steel or iron is dipped in a molten pool of zinc that maintains a temperature of around 860°F (460 °C). This molten bath begins a metallurgical bond between the zinc and the receiving metal. After the metal is pulled from the bath, it reacts to being exposed to the atmosphere, and the pure zinc mixes with oxygen to form zinc oxide. The zinc-oxide further reacts to carbon dioxide and forms zinc carbonate, which makes up the final protective coating on the material. The tell-tale sign of a hot-dipped galvanized material is the presence of a crystalline-like pattern on the surface, sometimes referred to as “spangle.”
Product Details:
Thickness | 0.12 mm to 0.80 mm |
Brand | HEUBACH |
Steel Grade | Galvanized Steel Sheets |
Material | Galvanized Steel Sheets |
Size | 700 mm to 1250 mm |
Surface Treatment | Galvanized Steel Sheets |
Material Grade | Galvanized Steel Sheets |
Usage/Application | - Off-Shore Oil Drilling Companies - Power Generation - Petrochemicals - Gas Processing - Specialty |
Galvanization is the process of applying a protective zinc coating to steel or iron in order to prevent it from rusting. The term is derived from the name of Italian scientist Luigi Galvani. Galvanized iron (GI) sheets are steel sheets which are basically coated with zinc and include a range of hot dip galvanized and electro-galvanized steel sheets. Zinc weathers at a very slow rate, so the coating generally has a long life. Zinc has a greater electro-negativity than iron and hence provides cathodic (or sacrificial) protection to the steel. This results in the zinc corroding in preference to the steel if the coating is chipped or damaged to expose the base metal. Besides acting as galvanic protector, The other functions of the zinc layer are as follow:
To retain the steel intact with its full initial strength.
To provide the surface a more pleasing appearance.
To increase the life of any suitable organic finishing system applied over it.
Tab – 1 Estimated life of galvanized iron sheets in different atmospheric conditions |
|||||
Zinc coating weight |
Rural |
Tropical marine |
Suburban |
Urban |
Highly industrial |
gsm |
Years |
Years |
Years |
Years |
Years |
600 |
40 |
40 |
30 |
25 |
15 |
375 |
30 |
30 |
20 |
17 |
9 |
300 |
20 |
20 |
12 |
10 |
7 |
180 |
8 |
8 |
5 |
4 |
3 |
100 |
6 |
6 |
4 |
3 |
2 |
The De-greasing Section helps the removal of oil and dirt by a cascaded process of hot alkaline de-greasing, cold rising, hot rising and hot air drying. Then annealing is done in an electrically heated horizontal furnace operated under a protective atmosphere with a calibrated ratio of nitrogen and hydrogen generated in a state–of–the–art automated Protective Gas Plant using ammonia and air as primary raw materials.
Galvanized Plain & Corrugated Sheet |
|
Capacity |
350000 MT per annum |
Thickness |
0.12 mm to 0.80 mm |
Width |
700 mm to 1250 mm |
4Nos. Continuous Galvanizing Lines |
Additional Information:
Product Details:
Minimum Order Quantity | 85 Kg |
Unit Pipe Length | 37 MM TO 96 MM |
Size/Diameter | 1/2 INCH TO 6 INCH |
Grade | Galvanized Steel Pipes |
Material | Galvanized Steel Pipes |
Thickness | 2 MM TO 6 MM |
Shape | Round |
Brand | HEUBACH |
Features | Galvanized Steel Pipes |
Galvanized Iron Pipes Supplier in India, Gi Seamless Pipes
HEUBACH INTERNATIONAL is one of the large suppliers & exporters for high quality Galvanized Iron Pipes. These pipes are widely used for conveying raw water & distribution of treated water in majority of rural water areas, where the requirement of water is less. Mostly medium quality Galvanized Iron are used. The Galvanized Iron are cheaper, lighter in weight and easy to handle & transport & easy to join them. Galvanized Iron sizes vary from range 15mm to 150mm. The Galavanized Iron are generally manufactured conforming to IS-1239. Generally screwed & socketed pipes are used. The Galvanized Iron welded Pipes shall be manufactured from hot rolled steel strip for welded gi pipes conforming to IS 10748 or Cold-rolled low carbon steel sheets and strips conforming to IS 513. The welded galvanized steel are then passed through sizing sections where any dimensional deviation are being corrected. Galvanized Iron are then pressure tested for any leaks. The Galvanized Iron are then cutted into desired lengths by automatic cutting machines. The varnishing and galvanization of pipes are done as per specific requirements. Also Galvanization is a process in which steel or iron is coated with a layer of zinc to protect them from rusting or corrosion.
TABLE OF CONTENT
Galvanized Iron Pipes Size Chart In India
Gi Pipe Weight Chart & Dimensions
Gi Hollow Pipe Chemical Composition
Gi Round Pipes Mechanical Properties
Gi Pipe Weight Chart & Dimension
Nominal Bore | Outside Diameter in | Thickness | Mass of | |
15 | 21.8 | 21.0 | 2.6 | 1.22 |
20 | 27.3 | 26.5 | 2.6 | 1.57 |
25 | 34.2 | 33.3 | 3.2 | 2.43 |
32 | 42.9 | 42.0 | 3.2 | 3.13 |
40 | 48.8 | 47.90 | 3.2 | 3.60 |
50 | 60.8 | 59.7 | 3.6 | 5.10 |
65 | 76.6 | 75.3 | 3.6 | 6.54 |
80 | 89.5 | 88.0 | 4.0 | 8.53 |
100 | 115.0 | 113.10 | 4.5 | 12.50 |
125 | 140.8 | 138.5 | 4.8 | 16.40 |
150 | 166.50 | 163.90 | 4.80 | 19.50 |
Gi Hollow Pipe Chemical Composition
Carbon | Manganese | Phosphorus | Sulphar |
0.20% | 1.40% | 0.035% | 0.030% |
Gi Round Pipe Mechanical Properties
Yield Stress | Tensile Strength | %Elongation |
195 N/mm2(Min.) | 320 to 520 N/mm2 | 20% (Min.) |
Additional Information: