Galvanized seamless steel pipe is a seamless carbon steel pipe with a hot-dip zinc coating applied per ASTM A53 / IS 1239 specifications, combining the structural integrity of seamless construction with the corrosion protection of galvanization. The zinc coating provides both barrier protection and sacrificial cathodic protection, significantly extending service life in corrosive and outdoor environments.
Galvanized seamless pipes are used in water supply systems, irrigation networks, fire protection sprinkler systems, structural frameworks, scaffolding, electrical conduit, and outdoor construction applications where long-term corrosion resistance without the need for painting or additional coating is required.
Spark Steel supplies galvanized seamless steel pipes conforming to ASTM A53 Type E Grade B and IS 1239 Part 1, with zinc coating minimum 400 g/m² for Class A and 550 g/m² for Class B. Available in sizes from ½" to 6" NPS in standard 6 m lengths. Supplied with material test reports and IS / ASTM compliance documentation. Third-party inspection certificates available on request.
Seamless gi pipe specification
Seamless gi pipe specification
| SPECIFICATION | DETAILS |
|---|---|
| Standard | IS 1239 / IS 3589 |
| Outer diameter | 1/2" to 20" (21.3 mm to 508 mm) |
| Wall thickness | 2.0 mm to 12.7 mm |
| Length | 6 m, 12 m and custom |
| Ends | Plain, Beveled, or Threaded |
| Density | ~7.85 g/cm³ |
Galvanized steel pipe price list
Galvanized steel pipe price list
| Description | Price in USD | Price in Kilogram (INR) |
|---|---|---|
| Seamless Galvanized Steel Pipe, Size/Diameter: 20, Unit Pipe Length: 6 | $ 1.17 | ₹ 100 |
| Galvanized Steel Pipes, Length: 2m | $ 0.014 | ₹ 76 |
Galvanized pipe weight chart
Galvanized pipe weight chart
| Size | Nominal Pipe Size |
Wall Thickness | OD | ID | Length (In.) |
Weight (Lb/Ft) |
|---|---|---|---|---|---|---|
| 1-1/2" SCH 40 | 1-1/2" | 0.145" | 1.9" | 1.61" | 288.00" | 2.730 |
| 2" SCH 40 | 2" | 0.154" | 2.375" | 2.067" | 252.00" | 3.679 |
| 2-1/2" SCH 40 | 2-1/2" | 0.203" | 2.875" | 2.469" | 252.00" | 5.790 |
| 3" SCH 40 | 3" | 0.216" | 3.5" | 3.068" | 252.00" | 7.570 |
| 1/2" SCH 40 | 1/2" | 0.147" | 0.84" | 0.546" | 252.00" | 0.850 |
| 3/4" SCH 40 | 3/4" | 0.113" | 1.05" | 0.824" | 252.00" | 1.130 |
| 1" SCH 40 | 1" | 0.179" | 1.315" | 0.957" | 252.00" | 1.679 |
| 1-1/4" SCH 40 | 1-1/4" | 0.14" | 1.66" | 1.38" | 252.00" | 2.273 |
| 1-1/2" SCH 40 | 1-1/2" | 0.145" | 1.9" | 1.61" | 252.00" | 2.730 |
| 3-1/2" SCH 40 | 3-1/2" | 0.226" | 4" | 3.548" | 252.00" | 9.810 |
| 4" SCH 40 | 4" | 0.237" | 4.5" | 4.026" | 252.00" | 10.790 |
Chemical composition of galvanized metal pipes
Chemical composition of galvanized metal pipes
| Element | Percentage |
|---|---|
| Cu | 0.18 max |
| S | 0.063 max |
| Fe | 99 min |
| C | 0.3 max |
| P | 0.05 max |
Galvanized steel pipe properties
Galvanized steel pipe properties
| Metric | Imperial | |
|---|---|---|
| Melting Point | ~1,510°C | ~2,750°F |
| Ultimate Tensile Strength | 400 MPa | 58,000psi |
| Density | 7.8 g/cc | 0.282 lb/in3 |
| Yield Tensile Strength | 317 MPa | 46,000psi |
Hot dip gi pipe hsn code
Hot dip gi pipe hsn code
| Hot Dip Galvanized Iron (GI) Pipes | 7306.30.10 |
Galvanized pipe pressure rating
Galvanized pipe pressure rating
| Outside Diameter (OD) | Nominal Pipe Size (NPS) | Wall Thickness | Schedule | Working Pressure (kg/cm²) | Working Pressure (psi) |
|---|---|---|---|---|---|
| 48.3 mm | 1 1/2 inch | 3.68 mm | Sch 40 | 42 | 600 |
| 60.3 mm | 2 inch | 3.91 mm | Sch 40 | 35 | 500 |
| 88.9 mm | 3 inch | 5.49 mm | Sch 40 | 31.6 | 450 |
| 21.3 mm | 1/2 inch | 2.77 mm | Sch 40 | 84 | 1200 |
| 26.7 mm | 3/4 inch | 2.87 mm | Sch 40 | 77 | 1100 |
| 33.4 mm | 1 inch | 3.38 mm | Sch 40 | 60 | 850 |
| 114.3 mm | 4 inch | 6.02 mm | Sch 40 | 26 | 370 |
Gi pipe dimensions
Gi pipe dimensions
| Size | OD (in MM) | Light (A) Class | Medium (B) Class |
|---|---|---|---|
| 4" | 114.30 | 9.75 | 12.20 |
| 1/2" | 21.30 | 0.947 | 1.21 |
| 3/4" | 26.70 | 1.36 | 1.56 |
| 1" | 33.40 | 1.98 | 2.41 |
| 1-1/4" | 42.20 | 2.54 | 3.10 |
| 1-1/2" | 48.30 | 3.23 | 3.56 |
| 2" | 60.30 | 4.08 | 5.03 |
| 2-1/2" | 76.20 | 5.71 | 6.42 |
| 3" | 88.90 | 6.72 | 8.36 |
| 5" | 141.30 | NA | 15.90 |
| 6" | 165.10 | NA | 18.90 |
Galvanized steel pipe weight calculator
Galvanized pipe sizes in mm
Galvanized pipe sizes in mm
| Nominal Pipe Diameter (DN) / Inch | Average Outer Dia in Milimeter | |
| DN 400 | 16″ | 406.4 |
| DN 65 | 2-1/2″ | 76.3 |
| DN 80 | 3″ | 89.1 |
| DN 100 | 4″ | 114.3 |
| DN 125 | 5″ | 139.8 |
| DN 10 | 3/8″ | 17.3 |
| DN 15 | 1/2″ | 21.7 |
| DN 20 | 3/4″ | 27.2 |
| DN 32 | 1-1/4″ | 42.7 |
| DN 40 | 1-1/2″ | 48.6 |
| DN 50 | 2″ | 60.5 |
| DN 150 | 6″ | 165.2 |
| DN 200 | 8″ | 216.3 |
| DN 250 | 10″ | 267.4 |
| DN 300 | 12″ | 318.5 |
| DN 350 | 14″ | 355.6 |
| DN 25 | 1″ | 34.0 |
| DN 450 | 18″ | 457.2 |
| DN 500 | 20″ | 508.0 |
| DN 550 | 22″ | 558.8 |
| DN 600 | 24″ | 609.6 |
Galvanized steel pipe applications
Galvanized steel pipe applications
| Plumbing | Agriculture |
| Gas pipelines | Scaffolding |
| Construction | Fencing |
| Railings | Home drainage systems. |
Galvanized pipe standard
- JIS G3444
- ASTM A53
- EN 10255
- IS 3589
- DIN 2444
- AS 1074
- BS 1387
- IS 1239 (Part 1)
Galvanized steel pipe advantages and disadvantages
Galvanized steel pipe advantages and disadvantages
| Advantages | Disadvantages |
|---|---|
| Excellent corrosion resistance | Can rust over time in harsh environments |
| Low maintenance | Heavier than alternatives (e.g., PVC) |
| Cost-effective for outdoor use | Not ideal for hot water systems |
| Long lifespan | Not suitable for high-pressure systems |
| Good mechanical strength | Galvanized coating may flake over time |
Place Your Order
We supply premium quality steel products for every industrial application. Call us or send an enquiry and our team will respond within 24 hours.
