These zinc-coated GI Pipes are highly resistant to the effects of water, wind, and road salts. Zinc’s natural resistance to corrosion marks it with a long-term protection quality in the external environment. Therefore, they find application in building and structural materials and mechanical and general engineering purposes. Additionally, manufacturers use galvanized pipes to fabricate bus bodies and railway boogies and telecommunication departments utilize them as conduit pipes.
For galvanised iron pipes to last longer, zinc quality is crucial. If the pipe is dull and pale in appearance, it indicates that the zinc is pure and of the highest grade, making the GI Pipes extremely durable. An eddy current non-destructive testing device filters the incorrectly welded tubes. A dot matrix printer marks the pipes with the required standard bore, class, length, and zinc coating.
Specifications of GI Pipes
GI Pipes are available in many specifications based on wall thickness, nominal mass, outside diameter, and other lengths. They are classified as L, M, and H. They start from 15 and go on to 150mm with a variation for every 5 mm. The Light GI Pipes follow specific tolerance. At the same time, the medium and heavy follow a tolerance different from the light GI pipe. All three are based on variations from four to seven meters.
Consumers choose the pipes based on various specifications such as tolerance on outside diameter, dimensions, wall thickness, weight, and length of pipe. The chemical composition and mechanical properties must be considered along with measurements. There are several leading GI Pipes manufacturers in India; one must pick from various sizes and thicknesses. These are as per IS: 1239 and IS: 3589, ASTM standards and Inspection protocols as laid by the most reputed agency, the Bureau of Indian Standards (BIS), and following the standard licensing norms.
These pipes often find use in rural water supply schemes where the need to transport raw water and distribute processed water is lower. GI pipes of average grade are most commonly used. These pipes are affordable, lightweight, and simple to handle, carry, and join. They range in size from 15 to 150 mm.
Classification of GI Pipes based on Gauge
They are three categories, and they are classified based on Guage. Each type has its applications.
Class A GI Pipes
Class A is a light-gauged GI Pipe. They are relatively low-cost and less rigid than Class B and Class C. This class has a yellow colour identification mark.
Class B GI Pipes
Class B is a medium gauged GI Pipe. They are more rigid than Class A GI Pipes, and are consequently more expensive than Class A but less expensive than Class B. They have moderate resistance and are used during construction and in some small-scale industries. This class has a blue colour identification mark.
Class C GI Pipes
Class C is a heavy gauged GI Pipe. They are highly rigid and have a very long life compared to Class A and Class B. Class C are marked red for identification. These pipes are used in large-scale industries and industrial equipment.
Why do GI Pipes have a Good Market Demand?
Manufacturers produce galvanized pipes using modern hot strip mills and high-quality in-house raw materials. The manufacturers use high-frequency induction welding (HFIW) or cold process to manufacture GI pipes. Next, a hot-dip galvanising process is followed, wherein the tubes are pickled to remove the impurities.
To ensure that only the best quality GI pipes reach consumers, all zinc-coated pipes undergo testing and quality control processes. Manufacturers make the pipes to meet all customer requirements and comply with BIS norms.
As the GI Pipes undergo a lot of galvanisation under extreme temperatures, they have excellent resistance and rigidity. This makes GI Pipes the ideal choice for most industrialists and contractors.
Hot-dip galvanised uses an advanced process that pickles the tubes to eliminate impurities and builds excellent corrosion resistance. To ensure that only top-quality galvanized pipes reach end customers, all zinc-coated GI pipes undergo several testing and quality control procedures. The plant’s advanced equipment and manufacturing infrastructure allow for high levels of customization to meet diverse customer requirements while still adhering to IS rules.
Hope this article was able to offer you a comprehensive outlook on specifications of GI Pipes.
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