Galvanised steel pipe
Steel pipe with a zinc coating, commonly selected where a protective surface finish is needed.
Supplier photograph: Steelmart black steel pipe. Representative configuration; the dimensions and ratings below apply to the identified reference model. Confirm the exact supplied item with your quote.
Open image at full size ↗ · Image sourcePiping materials · Metal pipe
Carbon steel pipe
Rigid ferrous pipe for industrial pipework where strength and a weldable or threaded connection are required.
Common uses
Plant services, water transfer and fabricated pipe assemblies.
Add this item to the rest of your list. KEPCO coordinates the supplier enquiries and confirms availability and lead time with your quote.
Product information
Specifications & documents
- Configuration options
- Seamless or welded construction; plain, bevelled, threaded or flanged ends.
- Application
- Plant services, water transfer and fabricated pipe assemblies.
Use the dimension tables below to select a standard and size. Confirm material, tolerance and operating limits for the offered item.
Selected reference fields compared on 2026-10-05. Carbon-steel Sch 40/80 OD and wall rows compared; calculated nominal bore checked. Not a pressure rating.
Technical references
- Pipe Dimensions ↗Drawing / dimensions · Confirm document region for the quoted product · Revision: 8 April 2021
- Pipe Dimensions ↗Drawing / dimensions · Confirm document region for the quoted product · Revision: 8 April 2021
Size reference
Pipe dimensions
Choose a standard and size to check the reference dimensions. Use the measurements that match your existing part or project specification.
| Size | Outside Ø | Nominal wall | Calculated ID* |
|---|---|---|---|
| DN15 / NPS 1/2 | 21.3 | 2.77 | 15.76 |
| DN20 / NPS 3/4 | 26.7 | 2.87 | 20.96 |
| DN25 / NPS 1 | 33.4 | 3.38 | 26.64 |
| DN32 / NPS 1 1/4 | 42.2 | 3.56 | 35.08 |
| DN40 / NPS 1 1/2 | 48.3 | 3.68 | 40.94 |
| DN50 / NPS 2 | 60.3 | 3.91 | 52.48 |
| DN65 / NPS 2 1/2 | 73 | 5.16 | 62.68 |
| DN80 / NPS 3 | 88.9 | 5.49 | 77.92 |
| DN90 / NPS 3 1/2 | 101.6 | 5.74 | 90.12 |
| DN100 / NPS 4 | 114.3 | 6.02 | 102.26 |
| DN125 / NPS 5 | 141.3 | 6.55 | 128.2 |
| DN150 / NPS 6 | 168.3 | 7.11 | 154.08 |
| DN200 / NPS 8 | 219.1 | 8.18 | 202.74 |
| DN250 / NPS 10 | 273.1 | 9.27 | 254.56 |
| DN300 / NPS 12 | 323.9 | 10.31 | 303.28 |
ID is calculated from nominal OD minus twice nominal wall; actual bore depends on manufacturing tolerances.
Dimension sources and scope
Carbon steel nominal pipe dimensions only. Schedule 40/80 and stainless 40S/80S are not interchangeable at every size. Galvanised pipe supplied to other standards must be identified separately.
Reference checked September 2026. Final dimensions, tolerances, material and operating rating are confirmed for the offered item.
Choose the right variant
Details to confirm
- Nominal size and actual outside diameter
- Wall thickness or schedule
- Grade, length and end preparation
Selection note
Specify the conveyed medium and corrosion allowance or protective coating.
These details describe the product family. The offered item’s dimensions, materials, operating limits and required approvals are confirmed before you order.
Add to your quote list
Include what you know. Leave anything uncertain blank and we’ll help clarify it.
Have an existing part to match?
Send a photo, part number or description with your list. We’ll help identify it and follow up suitable suppliers.