Schedule 80 4130 Tubing
Schedule 80 is the extra-strong pipe wall. When it appears on a 4130 enquiry it usually signals that a heavy-wall tube is wanted, and the requirement needs converting into an actual OD and wall.
Schedule 80 Wall Thicknesses
Schedule 80 pipe walls are heavier than Schedule 40 for the same nominal size — providing higher pressure capacity in pipe service. If the intent is a heavy-wall 4130 CDS tube with dimensions similar to Schedule 80 pipe, convert the NPS Schedule 80 dimensions (actual OD and wall from a pipe data table) to specify the 4130 mechanical tube.
| NPS Schedule 80 Size | Actual OD | Wall (approx.) |
|---|---|---|
| 0.5" NPS Sch 80 | 0.840" | 0.147" |
| 0.75" NPS Sch 80 | 1.050" | 0.154" |
| 1" NPS Sch 80 | 1.315" | 0.179" |
| 1.5" NPS Sch 80 | 1.900" | 0.200" |
| 2" NPS Sch 80 | 2.375" | 0.218" |
| Note | Convert to actual OD × wall for 4130 CDS specification |
Schedule 80 Dimensions by Pipe Size
Schedule 80 keeps the same outside diameter as Schedule 40 for each pipe size and adds wall on the inside, so the bore is smaller.
| Nominal pipe size | Outside diameter | Schedule 80 wall |
|---|---|---|
| 1/2" | 0.840" (21.3 mm) | 0.147" (3.73 mm) |
| 3/4" | 1.050" (26.7 mm) | 0.154" (3.91 mm) |
| 1" | 1.315" (33.4 mm) | 0.179" (4.55 mm) |
| 1-1/2" | 1.900" (48.3 mm) | 0.200" (5.08 mm) |
| 2" | 2.375" (60.3 mm) | 0.218" (5.54 mm) |
| 3" | 3.500" (88.9 mm) | 0.300" (7.62 mm) |
| 4" | 4.500" (114.3 mm) | 0.337" (8.56 mm) |
For a machined or structural part, send the OD, wall and length you need and the closest 4130 tube will be offered; the heavy wall tubing page explains how these sizes are supplied. For pressure piping, use pipe made and tested to a piping standard. Compare with Schedule 40.
Frequently Asked Questions
Is 4130 CDS tubing available in wall thicknesses matching Schedule 80 pipe?
The Schedule 80 wall thicknesses shown above are within or near the verified wall range (0.035"–0.500") for 4130 CDS. However, the ODs of NPS pipe do not correspond to standard mechanical tube ODs. Confirm specific OD/wall combination availability at the RFQ stage.
What is the wall of 2-inch Schedule 80 pipe?
0.218" (5.54 mm) on an outside diameter of 2.375" (60.3 mm).
Can heavy-wall 4130 tube replace Schedule 80 pipe?
For mechanical and structural parts, a tube of suitable OD and wall can be used. For pressure service the material must meet the piping code, so mechanical tubing should not be substituted.
Does Schedule 80 have the same OD as Schedule 40?
Yes. For a given pipe size the OD is the same; the extra wall reduces the bore.
Is Schedule 80 stronger than Schedule 40?
For the same pipe size it has a thicker wall, so it carries more pressure and load.
Source Heavy-Wall 4130 by Actual Dimensions
Convert Schedule 80 dimensions to actual OD and wall, then provide for a 4130 CDS quotation.
- Actual OD
- Wall
- Standard
- Footage
- MTC
- Delivery