Standard · PEX tubing (CTS)
ASTM F876/F877 (CTS)
Crosslinked polyethylene tubing in CTS (copper tube size) ODs, designated by SDR rather than schedule.
- Sizes published
- 9
- Values published
- 3
- Wall series
- 1
- Size range
- 1/4–2
What is in this table
Outer diameter and wall thickness for CTS sizes in the range above, in inches and millimetres, with the bore derived as OD − 2 × wall. The chart is the working page: ASTM F876/F877 (CTS) chart. Individual sizes have their own pages with sources listed per value.
- CTS 1/4 — OD 9.525 mm, DN 8 · wall not published
- CTS 3/8 — OD 12.7 mm, DN 10 · wall not published
- CTS 1/2 — OD 15.875 mm, DN 15 · 1 wall series
- CTS 5/8 — OD 19.05 mm · wall not published
- CTS 3/4 — OD 22.225 mm, DN 20 · 1 wall series
- CTS 1 — OD 28.575 mm, DN 25 · 1 wall series
- CTS 1 1/4 — OD 34.925 mm, DN 32 · wall not published
- CTS 1 1/2 — OD 41.275 mm, DN 40 · wall not published
- CTS 2 — OD 53.975 mm, DN 50 · wall not published
What is deliberately not here
These designations appear in at least one source for some size but were not confirmed by a second independent source, so they are recorded as unverified instead of published: 9. A missing value is not a wrong value — it is a value we did not earn.
A further 6 size × designation value(s) in this series are held back (one source only, or sources disagreeing). The published index reports those counts — a gap is information, a silence is not.
No revision year is claimed. We know these values match ASTM F876/F877 (CTS) as published by the sources listed on the size pages, but the specific edition was not verified — so nothing here says “ASTM F876/F877 (CTS)-2018” or any other year.
How each number got here
- Two independent published sources must print the same value.
- The value is parsed from the source's own table, not retyped by hand.
- Millimetres are derived from the inch value × 25.4 (exact), never copied from a third table.
- Bore is computed as OD − 2 × wall and labelled exact or maximum.
- Conflicts are kept and reported, not deleted. Full policy.
Not a substitute for the standard. ASME and ASTM documents carry tolerances, materials and pressure classes that this page does not reproduce. Use it to identify a size and to check a number, not to approve a design.