ERW Pipe Weight Chart & Size Guide
This ERW pipe weight chart and size guide helps buyers translate NB/mm/inch sizes and identify the wall thickness or class required before comparing MS or GI ERW pipe quotations. Book weight is commonly used for estimating material quantities and comparing per-metre and per-kilogram quotations.
Common NB / inch size references
| Nominal bore | Common inch reference |
|---|---|
| 15 mm | 1/2 inch |
| 20 mm | 3/4 inch |
| 25 mm | 1 inch |
| 32 mm | 1 1/4 inch |
| 40 mm | 1 1/2 inch |
| 50 mm | 2 inch |
| 65 mm | 2 1/2 inch |
| 80 mm | 3 inch |
| 100 mm | 4 inch |
MS ERW Pipe Weight Chart
Weight changes with outside diameter and wall thickness. Two pipes with the same nominal bore can have different book weights when their class or thickness differs.
GI Pipe Weight Chart
GI pipe selection should also account for the galvanized coating and the applicable product standard.
ERW Pipe Size Chart
Use nominal bore and inch equivalents for enquiry, but confirm OD, thickness and standard from the relevant manufacturer catalogue.
Quotation conversion
When a pipe is quoted per kg but required by length, use the approved book weight for the exact specification—not a generic weight for the nominal size.
GI Pipe Price Guide MS Pipe Price Guide Request Pipe Quotation