What is the outside diameter of 1 1/2 inch copper pipe?
Is pipe measured by ID or OD?
In short: Tube is measured by outside diameter, pipe is measured by inside diameter. There is often confusion as to which size die the customer actually needs - Pipe Size or Tubing Size. Keep in mind that pipe size refers to a nominal - not actual - inside pipe diameter. Schedule refers to the pipe's wall thickness.
What is the OD of 1.5 pipe?
What is the OD of 1 1 2 plastic pipe?
Pipe Size Decimal OD Metric OD
--------- ---------- ---------
1" 1.315" 33.40 mm
1-1/4" 1.660" 42.16 mm
1-1/2" 1.900" 48.26 mm
2" 2.375” 60.32 mm