ERW Pipe Weight Chart and Size Guide
ERW pipe weight depends on outside diameter, wall thickness, grade and the applicable manufacturing standard. Use the manufacturer catalogue for final engineering values and request confirmation before ordering.
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How ERW pipe weight is determined
Weight per metre is calculated from outside diameter, wall thickness and steel density (7,850 kg/m³ for mild steel). The standard formula is:
Weight (kg/m) = 0.02466 × wall thickness (mm) × (outside diameter − wall thickness) (mm)
Sizes up to 150mm NB (6") follow IS 1239 Part 1, in three wall-thickness classes: Light (Class A), Medium (Class B) and Heavy (Class C) — the outside diameter is the same across all three classes for a given nominal bore, only the wall thickness changes. Sizes 200mm NB and above follow IS 3589. For the full dimensional tables, see our IS 1239 / IS 3589 reference sheet.
Information needed for quotation
Mention nominal bore or outside diameter, class or schedule, wall thickness, grade, length, quantity, make and delivery city.
MS and GI pipe differences
Mild-steel ERW pipe is supplied in black or painted condition, while GI pipe includes zinc coating. Coating and specification affect price and weight.
Use manufacturer values
For estimation and purchase orders, use the current manufacturer catalogue and verify final unit weight in the quotation.
Frequently Asked Questions
Is ERW pipe weight the same for all brands?
No. Nominal dimensions follow standards, but tolerances and catalogue book weights can differ slightly by manufacturer.
What details should be mentioned in an ERW pipe enquiry?
Mention size, class or schedule, wall thickness, grade, length, quantity, brand preference and delivery location.