IS 1239 / IS 4736 Certified
Minimum 360-400 g/m² zinc coating, high hydrostatic strength & corrosion resistance.
Extensive Yard Inventory
15mm NB (1/2") to 300mm NB (12") in prime GI ready stock in Raipur.
Wholesale Mill Rates
Competitive commercial pricing with transparent weighbridge billing.
PAN-India Dispatch
Prompt multi-axle freight loading with on-time delivery tracking.
Galvanized Iron Pipes (IS 1239 / IS 3589 GI Pipes) Dimensions & Weight Table
Complete weight specifications table per meter for Galvanized Iron Pipes (GI Pipes / Light Class A, Medium Class B, Heavy Class C).
Galvanized Iron Pipes Size & Weight Chart (IS 1239 / IS 3589)
All NB Sizes| Pipe Nominal Size (NB / Inches) | Outside Diameter (OD) | Class A (Light) kg/m | Class B (Medium) kg/m | Class C (Heavy) kg/m | Instant Quote |
|---|---|---|---|---|---|
| 15 mm NB (1/2") | 21.3 mm | 1.22 | 1.45 | 1.71 | |
| 20 mm NB (3/4") | 26.9 mm | 1.58 | 1.90 | 2.26 | |
| 25 mm NB (1") | 33.7 mm | 2.43 | 2.97 | 3.56 | |
| 32 mm NB (1-1/4") | 42.4 mm | 3.12 | 3.84 | 4.43 | |
| 40 mm NB (1-1/2") | 48.3 mm | 3.60 | 4.43 | 5.10 | |
| 50 mm NB (2") | 60.3 mm | 5.10 | 6.17 | 7.20 | |
| 65 mm NB (2-1/2") | 76.1 mm | 6.51 | 7.90 | 9.27 | |
| 80 mm NB (3") | 88.9 mm | 8.47 | 10.10 | 11.80 | |
| 100 mm NB (4") | 114.3 mm | 12.10 | 14.40 | 16.80 | |
| 125 mm NB (5") | 139.7 mm | 16.20 | 19.20 | 22.50 | |
| 150 mm NB (6") | 165.1 mm | 19.20 | 22.80 | 26.80 | |
| 200 mm NB (8") | 219.1 mm | - | 33.30 | 33.30 (IS 3589) | |
| 250 mm NB (10") | 273.0 mm | - | 41.70 | 41.70 (IS 3589) | |
| 300 mm NB (12") | 323.9 mm | - | 50.10 | 50.10 (IS 3589) |
Comprehensive Guide to Galvanized Iron Pipes (GI Pipes)
Galvanized Iron Pipes (GI Pipes) are fabricated from premium low-carbon Electric Resistance Welded (ERW) steel tubes that are thoroughly chemically descaled, pickled, and submerged in a bath of molten zinc at 450°C (hot-dip galvanizing per IS 4736 / IS 1239). This metallurgical process bonds a protective zinc-iron alloy coating (minimum 360–400 g/m² or 50–60 microns) that prevents oxidation, rust, and acid degradation, providing exceptional longevity in outdoor and underground applications.
At gipipes.com, we stock and supply a comprehensive range of IS 1239 (Part 1) and IS 3589 certified Galvanized Iron Pipes in Light (Class A - Yellow Band), Medium (Class B - Blue Band), and Heavy (Class C - Red Band) wall thicknesses. All pipes are available in Plain Squared Ends (PE), Bevelled Ends (BE), and Screwed & Socketed ends (threaded BSPT with GI couplings per IS 1239 Part 2). Every batch undergoes strict hydro-testing (minimum 50 bar), zinc coating uniformity checks, and dimensional calibration.
Potable Water Supply & Plumbing
Rust-free domestic water piping, municipal drinking water distribution, plumbing riser lines, and drainage networks.
Fire Fighting & Hydrant Networks
Medium and heavy class galvanized pipes designed to withstand sustained hydrostatic water pressure for automatic sprinkler networks.
Agricultural Irrigation & Borewells
Corrosion-resistant borewell column casing pipes, submersible pump installations, and drip/sprinkler agricultural distribution lines.
Solar Mounting & Structural PEB
Outdoor solar panel mounting structures, greenhouse tubular framing, scaffolding pipes, and industrial protective railings.
Galvanized Iron (GI) Pipe Weight Calculation Formula
The theoretical weight of circular steel pipes is computed from outside diameter (OD in mm) and nominal wall thickness (WT in mm) based on a steel density of 7.85 g/cm³:
Base Steel Weight (kg/m) = (Outside Diameter mm − Wall Thickness mm) × Wall Thickness mm × 0.02466
For Galvanized Iron (GI) Pipes, a zinc mass coating factor of 3% to 5% is added as per IS 1239 (Part 1) and IS 4736 guidelines. For structural estimation and bill of quantities (BOQ), fabricators, MEP consultants, and site engineers refer directly to our IS 1239 GI Pipe Weight Table above.
Frequently Asked Questions
Key technical and commercial answers regarding Galvanized Iron (GI) Pipes & IS 1239 specifications.
Galvanized Iron (GI) Pipes are Electric Resistance Welded (ERW) mild steel pipes coated with a protective zinc layer via hot-dip galvanization complying with IS 1239 (Part 1) and IS 4736. For large diameter industrial applications above 150mm NB (6 inches), pipes are manufactured under IS 3589.
Under BIS IS 1239 norms: Class A (Light Class) is identified with a Yellow Band (used for lightweight irrigation, fencing, and electrical conduit); Class B (Medium Class) with a Blue Band (standard for domestic plumbing, borewells, and municipal water); and Class C (Heavy Class) with a Red Band (engineered for high-pressure fire fighting, steam lines, and structural PEB).
Standard IS 1239 / IS 4736 galvanized pipes feature a minimum zinc mass coating of 360 to 400 g/m² (approx. 50 to 60 microns). The sacrificial zinc layer shields the core steel from moisture, soil chemicals, and atmospheric oxygen, offering a service life of 25 to 50+ years in typical industrial and outdoor environments.
We supply GI Pipes in standard 6.0 meter lengths in Plain Ends (PE) for welding, Bevelled Ends (BE) for grooved couplings, and Screwed & Socketed (S&S) ends with BSPT threads and hot-dip galvanized couplings complying with IS 1239 (Part 2). Custom cut lengths are also available for bulk project orders.
Yes, all prime material dispatches are accompanied by manufacturer Mill Test Certificates (MTC) certifying hydrostatic test pressure (minimum 50 bar / 5 MPa), zinc coating weight (g/m²), free-bore test, bending test, and chemical composition.
You can directly contact our sales team at +91 9009272007 / 0771-4007433, click "Get Instant Quote" on any page, or send your bill of quantities to jmdtradingco.99@gmail.com for prompt mill rates and freight estimates.
Ready to Place Your Order for Galvanized Iron Pipes?
Connect directly with our Raipur sales desk for immediate price quotations, bulk project discounts, and swift logistics across India.