MS (Mild Steel) pipes are low-carbon steel tubes used for plumbing, fabrication, structural work, and industrial applications.
When buying MS pipes, weight is critical because:
- It determines the steel quantity you’re paying for.
- Pricing is often based on per kg rates.
- Weight affects transportation cost and load calculations.
See also: [MS Pipe Suppliers & Dealers – 2025 Mild Steel Pipe Rates, Grades & Buying Tips]
Understanding MS pipe weight calculation
Theoretical weight of a steel pipe is calculated using:
Formula:
Weight per meter (kg) = (OD – Wall Thickness) × Wall Thickness × 0.02466 × 1000
Where:
- OD = Outer diameter (mm)
- Wall Thickness (mm)
- 0.02466 = Steel density constant
Example:
For a 50 mm OD pipe, 3.2 mm thick:
(50 – 3.2) × 3.2 × 0.02466 × 1000 ≈ 3.65 kg/m
MS pipe weight chart per meter (IS 1239 & IS 3589)
| Nominal Bore (NB) | OD (mm) | Class A (kg/m) | Class B (kg/m) | Class C (kg/m) |
|---|---|---|---|---|
| 15 mm | 21.34 | 1.27 | 1.42 | 1.68 |
| 20 mm | 26.67 | 1.63 | 1.85 | 2.21 |
| 25 mm | 33.40 | 2.38 | 2.72 | 3.24 |
| 32 mm | 42.16 | 3.22 | 3.70 | 4.46 |
| 40 mm | 48.26 | 3.84 | 4.41 | 5.32 |
| 50 mm | 60.33 | 5.18 | 5.96 | 7.13 |
| 65 mm | 76.10 | 6.63 | 7.65 | 9.24 |
| 80 mm | 88.90 | 8.36 | 9.64 | 11.64 |
| 100 mm | 114.30 | 11.33 | 13.10 | 15.85 |
For square sections these are refrencec , see: [MS Square Pipe Weight Chart – Kg Per Meter for All Sizes]
HSN code for MS pipes
The HSN code (Harmonized System of Nomenclature) for mild steel pipes is:
- 7306 – For welded pipes and tubes of iron or steel (non-stainless)
This code is used for GST billing and customs classification.
How to use the weight chart for buying
- Verify supplier invoices – Cross-check the billed weight with the theoretical chart.
- Avoid underweight stock – Pipes lighter than standard may fail early.
- Estimate transport cost – Calculate total load weight before dispatch.
Common mistakes in weight verification
- Not considering length – Charts are per meter; confirm the actual length of supplied pipes.
- Mixing standards – IS 1239 and IS 3589 pipes have different thickness and weights.
- Ignoring tolerance – Actual weight may vary ±5–7% from theoretical.
Full form of MS pipe
MS pipe stands for Mild Steel pipe – a carbon steel product with low carbon content (typically ≤0.25%), offering easy weldability and good ductility.
Where to get accurate MS pipe weight data
For the most reliable data, refer to:
- Bureau of Indian Standards (BIS) charts
- Manufacturer catalogues (Tata, Jindal, Apollo, etc.)
- Verified suppliers like Udhhyog
+91 9311120784 | Udhhyog.com | Submit RFQ
