Thickness will differ.

GI pipes (IS No: 1239; Part 1- 1990) are made from hot rolled coils of specified thickness. The pipes are fully galvanized. They are available in 8 mm dia. to 100 mm dia. GI pipes are available in three grades depending on the thickness of the sheet used in the pipe. The three grades are as follows.

1. Light- Class A: The pipe is marked in yellow color for identification

2. Medium- Class B: The pipe is marked in blue color for identification.

3. Heavy – Class C . The pipe is marked in red color for identification.

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