ID, OD and Circumference Table for Schedule-80 PVC High Pressure Pipes ASTM D1785

Below is the ID, OD, and Circumference table for Schedule-80 PVC high-pressure pipe manufactured to ASTM D1785, covering 3/8″ through 24″ nominal pipe size (NPS).

Notes

• OD (Outside Diameter) is fixed by NPS (same for Sch-40 & Sch-80).
• ID (Inside Diameter) is smaller for Sch-80 due to thicker walls.
• Circumference is calculated from OD:
  [
  C = pi times text{OD}
  ]
• Units are inches.

Schedule-80 PVC Pipe Dimensions — ASTM D1785