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Technical Reference
MS Pipe Weight Chart (kg/m)
IS 1239 Part 1 plain-end weights for 15–150 NB — Light (A), Medium (B) and Heavy (C), including kg per 6 m trade length.
This MS pipe weight chart lists theoretical plain-end weight in kg per metre for IS 1239 ERW / mild steel pipes from 15 NB to 150 NB across Class A (Light), Class B (Medium) and Class C (Heavy). Weights use the industry formula W = (OD − WT) × WT × 0.02466 (steel density 7850 kg/m³). Example: a 50 NB (2 inch) Medium pipe weighs 5.03 kg/m — one 6 m length is about 30.2 kg.
Worked example for 50 NB Medium: OD = 60.3 mm, WT = 3.6 mm → W = (60.3 − 3.6) × 3.6 × 0.02466 = 5.03 kg/m. Click any NB row for a dedicated page with Class A/B/C detail, pieces per tonne, and GI notes.
Note: Figures are theoretical plain-end MS weights. For non-standard OD or wall, use the steel pipe weight calculator. For live rates see the MS pipe price list.
Full IS 1239 Weight Chart — 15 to 150 NB
Each class column shows kg/m and kg per 6 m length. NB links open the size-specific weight page.
| NB (mm) | Inch | OD (mm) | Class A (Light) kg/m · kg/6 m | Class B (Medium) kg/m · kg/6 m | Class C (Heavy) kg/m · kg/6 m |
|---|---|---|---|---|---|
| 15 | ½ inch | 21.3 | 0.95 · 5.7 | 1.20 · 7.2 | 1.43 · 8.6 |
| 20 | ¾ inch | 26.9 | 1.40 · 8.4 | 1.56 · 9.4 | 1.87 · 11.2 |
| 25 | 1 inch | 33.7 | 1.99 · 11.9 | 2.41 · 14.5 | 2.93 · 17.6 |
| 32 | 1¼ inch | 42.4 | 2.55 · 15.3 | 3.09 · 18.5 | 3.79 · 22.7 |
| 40 | 1½ inch | 48.3 | 3.25 · 19.5 | 3.56 · 21.4 | 4.37 · 26.2 |
| 50 | 2 inch | 60.3 | 4.10 · 24.6 | 5.03 · 30.2 | 6.19 · 37.1 |
| 65 | 2½ inch | 76.1 | 5.75 · 34.5 | 6.44 · 38.6 | 7.95 · 47.7 |
| 80 | 3 inch | 88.9 | 6.76 · 40.6 | 8.37 · 50.2 | 9.95 · 59.7 |
| 100 | 4 inch | 114.3 | 9.83 · 59.0 | 12.18 · 73.1 | 14.50 · 87.0 |
| 125 | 5 inch | 139.7 | 15.00 · 90.0 | 15.97 · 95.8 | 17.88 · 107.3 |
| 150 | 6 inch | 165.1 | 17.82 · 106.9 | 18.97 · 113.8 | 21.27 · 127.6 |
How is pipe weight per metre calculated?
Plain-end steel pipe mass per metre is the cross-sectional steel area times density. The trade shortcut used across Indian mills and stockists is:
Weight (kg/m) = (OD − WT) × WT × 0.02466
- OD = outer diameter in mm
- WT = wall thickness in mm
- 0.02466 = π × 7850 / 1,000,000 (carbon steel density constant)
For 50 NB Medium: (60.3 − 3.6) × 3.6 × 0.02466 = 5.03 kg/m. A 6 m length weighs 30.2 kg. Need a non-standard wall? Use the free weight calculator.
MS vs GI pipe weight
Galvanized (GI) pipe is MS pipe with a zinc coating. Zinc typically adds roughly 3–6% mass over the plain-end MS weight depending on coating class and surface area. Use the MS figures below as the base; for GI orders expect a small uplift, or confirm coated mass on the mill test certificate (MTC).
Weight chart vs actual dispatch weight
Chart numbers are theoretical. Mills produce to dimensional tolerances; mass can vary under typical mill tolerance (commonly discussed around ±10% depending on product and PO terms). Always reconcile BOQ estimates against the mill test certificate (MTC) and agreed weighing terms at dispatch — billing follows the actual or theoretical weight basis agreed in your PO, not a reference chart.
Frequently Asked Questions
Related Resources
- Steel Pipe Weight Calculator (custom OD/WT)
- IS 1239 Class Thickness Chart
- MS Pipe Price List
- IS 1239 Standard — Full Reference
- Request a Wholesale Quote
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