One of the most common mix-ups at the counter is pipe versus tube, and it usually comes down to how each one is measured. Pipe is sold by nominal pipe size and schedule, so a 1-inch Schedule 40 pipe actually measures about 1.315 inches across the outside. Round tube is sold by its true outside diameter and wall thickness, so 1-inch tube really is 1 inch across.
That difference matters the moment parts have to fit together, like sliding one piece inside another for a telescoping leg, matching an existing handrail fitting, or sizing a clamp or bracket. Pipe is built around flow and pressure ratings, while tube is typically chosen for structural and mechanical work where exact dimensions and a cleaner finish matter more.
If you're not sure which one your drawing calls for, bring the old part, a fitting, or your measurements to our Marietta location and we'll match it before we cut. Both are stocked in a range of materials and cut to length with no minimum order. Have you ever ordered pipe when you needed tube, or the other way around?
#Metalworking #Fabrication
Authentic side-by-side photo of a length of Schedule 40 pipe and a length of round tube with a tape measure or calipers across the ends, shot at the Marietta location. A carousel showing the two cross-sections works well on Instagram. Real photos strongly preferred over stock. No Google Drive image folder is set up for this client yet, so request a real photo from the Marietta location.
Canva text suggestion: "1-Inch Pipe Measures 1.315 Inches Across" or "Pipe or Tube? Measure Before You Order"