Steel pipe sizes guide.
Compare nominal size, outside diameter and wall thickness before ordering. Use the standards catalogue as a reference, or ask us about the size in your project.
Pipe size help
Find the pipe size you need.
Nominal size is a standard designation, not always the measured diameter. Outside diameter measures the pipe across its outer surface; wall thickness affects the opening inside.
Check the complete size-table row against your project specification, including the length and unit weight you need. You can use the standards catalogue as a reference.
Download standards catalogueNeed help with a size? Ask Supreme about pipe sizes and share the specification or drawing you have.
Tell us what your project needs.
Share your drawings or pipe specification if you have them.
Request a quote