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What are the differences between GI/GP/MS PIPES and TUBES

Hi, I’m Ella Ma, the CEO of tytsteel.com. With more than 10 years of experience in OEM/ODM steel pipe, I’d love to share with you the valuable knowledge related to steel products from a Chinese supplier’s perspective. Hope you like this article, and please share it or subscribe to our newsletter.

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GI Pipes and Tubes

GI stands for “galvanized iron”. Thus, GI pipes are galvanized iron pipes, or called coated iron pipes in old terminology. GI carbon steel pipes are immersed in a galvanic (zinc) bath. GI (Galvanized Iron) Pipes are classified into 3 grades based on their weight per meter and inner diameter thickness. The more thickness, the better the performance, and durability. According to IS 1239, each pipe shall bear a color strip across the circumference for identifying the “class” of the GI pipes. These pipes are cheaper, lightweight, and easy to handle.

Difference between GI and GP pipes

The full Form of GP pipe is “Galvanized Pipe”. GP Pipes are made of thin sheets of carbon steel electroplated with zinc and then rolled into pipes. GP pipes are superior to GI pipes in terms of finish. Galvanized pipes are dipped in a protective zinc coating to prevent corrosion and rust. This piping was commonly installed in homes built before 1960. When the galvanized pipe was invented, it became an alternative to lead pipe for water supply lines.

Galvanized pipe and tube, covered with zinc, increases the pipes and tubes life expectancy and make them more resistant to corrosion and mineral deposits in the line. It is a plumbing material that is used in water supply lines and has been used in homes for years.

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