ERW Steel Pipe Sizes, Thickness and Weight Chart
ERW steel pipes are widely used in construction, industrial fabrication, infrastructure, water supply, agriculture and engineering projects. Selecting the correct pipe size and wall thickness is important for structural performance, fabrication accuracy and material cost.
One of the most common questions buyers ask is: How much does an ERW steel pipe weigh per meter?
Pipe weight depends on its outside diameter, wall thickness, length and material density. Engineers and procurement teams use weight charts to estimate steel quantities, transportation requirements and project costs.
Hi-Tech Pipes Limited manufactures ERW steel pipes and tubes for structural, industrial and infrastructure applications across India.
What are ERW steel pipes?
ERW stands for Electric Resistance Welded. ERW pipes are manufactured by forming steel strips or coils into a tubular shape and joining their edges through electrical resistance heating and pressure.
These pipes are available in different outside diameters, wall thicknesses, lengths, grades and surface finishes.
ERW steel pipe sizes in mm
ERW pipe dimensions are generally specified using outside diameter (OD), wall thickness and length. Some piping products are also identified by nominal bore (NB) or nominal pipe size (NPS).
Common nominal pipe sizes and outside diameters
| Nominal Bore | Nominal Pipe Size | Outside Diameter (mm) |
|---|---|---|
| 15 mm | ½ inch | 21.3 |
| 20 mm | ¾ inch | 26.9 |
| 25 mm | 1 inch | 33.7 |
| 32 mm | 1¼ inch | 42.4 |
| 40 mm | 1½ inch | 48.3 |
| 50 mm | 2 inch | 60.3 |
| 65 mm | 2½ inch | 76.1 |
| 80 mm | 3 inch | 88.9 |
| 100 mm | 4 inch | 114.3 |
| 125 mm | 5 inch | 139.7 |
| 150 mm | 6 inch | 168.3 |
| 200 mm | 8 inch | 219.1 |
ERW steel pipe thickness chart
Wall thickness is the distance between the outer and inner surfaces of a pipe. It affects pipe weight, structural properties and pressure resistance.
Common thickness examples include 1.6 mm, 2.0 mm, 2.3 mm, 2.6 mm, 2.9 mm, 3.2 mm, 3.6 mm, 4.0 mm, 4.5 mm, 5.0 mm and 6.0 mm.
Actual availability depends on the pipe diameter, steel grade, manufacturing standard and manufacturer.
ERW steel pipe weight chart in kg per meter
The following chart shows approximate theoretical weights for selected ERW steel pipe dimensions, calculated using a steel density of 7,850 kg/m³.
| OD (mm) | 2.0 mm | 2.6 mm | 3.2 mm | 4.0 mm | 5.0 mm | 6.0 mm |
|---|---|---|---|---|---|---|
| 21.3 | 0.95 | 1.20 | 1.43 | 1.71 | — | — |
| 26.9 | 1.23 | 1.56 | 1.87 | 2.26 | — | — |
| 33.7 | 1.56 | 1.99 | 2.41 | 2.93 | 3.54 | — |
| 42.4 | 1.99 | 2.55 | 3.09 | 3.79 | 4.61 | — |
| 48.3 | 2.28 | 2.93 | 3.56 | 4.37 | 5.34 | — |
| 60.3 | 2.88 | 3.70 | 4.51 | 5.55 | 6.82 | 8.03 |
| 76.1 | 3.65 | 4.71 | 5.75 | 7.11 | 8.77 | 10.37 |
| 88.9 | 4.29 | 5.53 | 6.76 | 8.38 | 10.35 | 12.27 |
| 114.3 | 5.54 | 7.16 | 8.77 | 10.88 | 13.48 | 16.03 |
| 139.7 | 6.79 | 8.79 | 10.77 | 13.39 | 16.61 | 19.78 |
| 168.3 | 8.20 | 10.62 | 13.03 | 16.21 | 20.14 | 24.02 |
| 219.1 | 10.71 | 13.88 | 17.04 | 21.22 | 26.40 | 31.53 |
Note: Values are approximate theoretical weights in kg/m. A dash indicates that the combination is not included in this chart. These figures do not confirm product availability.
How to calculate ERW steel pipe weight
The approximate weight of a carbon steel pipe can be calculated using:
Weight (kg/m) = 0.02466 × Wall Thickness × (Outside Diameter − Wall Thickness)
Both outside diameter and wall thickness must be entered in millimeters.
Example calculation
For an ERW steel pipe with an outside diameter of 60.3 mm and a wall thickness of 3.2 mm:
Weight = 0.02466 × 3.2 × (60.3 − 3.2) ≈ 4.51 kg/m
A 6-meter pipe therefore weighs approximately 27.04 kg.
ERW pipe weight calculator
Why actual ERW pipe weight may differ
Theoretical and actual pipe weights may differ because of dimensional tolerances, steel density, weld bead geometry, surface coatings and manufacturing variations.
Galvanized pipes may weigh more because of their zinc coating. For procurement, refer to the applicable product standard and manufacturer's documentation.
How to select the right ERW pipe size and thickness
1. Identify the application
Structural fabrication, scaffolding, water transportation and industrial piping require different specifications.
2. Confirm the outside diameter
Check the actual outside diameter against the engineering drawing.
3. Select the wall thickness
Wall thickness affects structural properties, pressure resistance and material cost. Follow the approved engineering design.
4. Check the steel grade
Verify the required material grade, mechanical properties and applicable standard.
5. Review corrosion protection
Select black, painted, galvanized or coated pipes according to the service environment.
6. Verify testing requirements
Confirm dimensional inspection, mechanical testing, weld inspection and pressure testing where required.
Applications of different ERW steel pipe sizes
Small-diameter ERW pipes
Commonly used in railings, fencing, furniture, light fabrication and selected utility applications.
Medium-diameter ERW pipes
Used in scaffolding, machinery frames, agricultural systems, structural supports and industrial fabrication.
Large-diameter ERW pipes
Used in selected structural, water transportation and industrial pipeline applications, depending on manufacturing capabilities and standards.
ERW steel pipe manufacturer in India: Hi-Tech Pipes Limited
Hi-Tech Pipes Limited manufactures ERW steel pipes, MS pipes, galvanized pipes and structural hollow sections for construction, infrastructure, agriculture, industrial fabrication and engineering applications.
For project procurement, customers should confirm available sizes, wall thicknesses, grades, standards, testing requirements and delivery arrangements directly with the company.
Visit Hi-Tech Pipes Limited to learn more about its steel pipe and tube products.
Frequently asked questions
1. What is the standard size of an ERW steel pipe?
ERW pipes are available in various nominal sizes and outside diameters. Common examples include 21.3 mm, 33.7 mm, 48.3 mm, 60.3 mm, 88.9 mm and 114.3 mm OD.
2. How do you calculate ERW pipe weight per meter?
Use the formula: Weight (kg/m) = 0.02466 × Thickness × (Outside Diameter − Thickness), with dimensions in millimeters.
3. What is the weight of a 2-inch ERW pipe?
A 2-inch nominal pipe commonly has a 60.3 mm outside diameter. With a 3.2 mm wall thickness, its theoretical weight is approximately 4.51 kg/m.
4. Does wall thickness affect ERW pipe weight?
Yes. Increasing wall thickness increases the amount of steel and therefore the weight per meter for the same outside diameter.
5. What is the difference between nominal bore and outside diameter?
Nominal bore is a pipe size designation. Outside diameter is the actual external measurement of the pipe.
6. Are ERW pipe weights the same for black and galvanized pipes?
No. Galvanized pipes have an additional zinc coating that contributes to their weight.
7. Which standards are used for ERW steel pipes in India?
Common standards include IS 1239, IS 1161 and IS 4923. The applicable standard depends on the product and its intended use.
8. Where can I buy ERW steel pipes in India?
Hi-Tech Pipes Limited manufactures ERW steel pipes and tubes for construction, industrial and infrastructure applications. Buyers can enquire through the company's official website.
Conclusion
ERW steel pipe size, thickness and weight are important factors in material selection, transportation, cost estimation and project planning.
Theoretical weight charts help estimate quantities, but actual dimensions and weights should be verified against the applicable standard and manufacturer's specifications.
Hi-Tech Pipes Limited supplies ERW steel pipes and tubes for industrial and structural applications across India.