Welded steel tubes and pipes, including galvanised (GI), ERW and hollow sections.
GI Pipe falls under HSN 7306, in chapter 73 (Articles of iron or steel).
Most GI and MS pipes used in buildings are welded pipes of heading 7306, with square and rectangular hollow sections in 730661. Seamless pipes are heading 7304 and cast iron pipes 7303. All are 18%.
| Code | Description |
|---|---|
| 730630 | Other welded pipes of circular cross section, of iron or non alloy steel (GI, ERW) |
| 730640 | Welded pipes of stainless steel |
| 730661 | Hollow sections of square or rectangular cross section |
The GST rate on GI pipe is 18%.
| GST rate | Within a state | Between states |
|---|---|---|
| 18% | CGST 9% + SGST 9% | IGST 18% |
Compare other goods on the GST rates list.
The number of digits depends on your aggregate turnover in the previous financial year.
| Turnover last year | Digits | Write |
|---|---|---|
| Up to Rs 5 crore | 4 on B2B invoices, optional on B2C | 7306 |
| Above Rs 5 crore | 6 on every invoice | 730630, 730640, 730661 |
| Export or import | 8 on the shipping bill or bill of entry | From the Customs Tariff, chapter 73 |
Here is how a line for GI pipe looks on a tax invoice within one state: 50 × length of 6 m at Rs 1,350.00 each, taxed at 18%. The figures are an example, not a market price.
| Item | HSN | Qty | Rate (Rs) | Taxable (Rs) | CGST (Rs) | SGST (Rs) | Total (Rs) |
|---|---|---|---|---|---|---|---|
| GI Pipe | 7306 | 50 × length of 6 m | 1,350.00 | 67,500.00 | 6,075.00 | 6,075.00 | 79,650.00 |
Sold to a buyer in another state, the same line carries IGST of Rs 12,150.00 instead of CGST and SGST. Make the full invoice with the GST invoice format: it fills in the tax split, round off and amount in words.
Chapter 73 (Articles of iron or steel) covers: Pipes, tubes, structures, fasteners, utensils and other articles of iron or steel.
Other pages in chapter 73
Products often bought, sold or invoiced together with GI pipe:
GI Pipe falls under HSN 7306: welded steel tubes and pipes, including galvanised (GI), ERW and hollow sections. Common 6 digit codes are 730630 for other welded pipes of circular cross section, of iron or non alloy steel (GI, ERW) and 730640 for welded pipes of stainless steel.
18%: CGST 9% plus SGST 9% on a sale within a state, or IGST 18% on a sale between states.
If your aggregate turnover in the previous financial year was up to Rs 5 crore, write the 4 digit code 7306 on B2B invoices (optional on B2C invoices). Above Rs 5 crore, write 6 digits, such as 730630, on every invoice. Shipping bills and bills of entry need the full 8 digit code from the Customs Tariff.
Rates checked on 13 October 2026 against the GST rate notifications in force (GST 2.0 from 22 September 2025). Descriptions are in our own words and are a guide, not a ruling: for a disputed or high value item, check the notification or ask your tax adviser.