ASME B16.28
Short-radius elbows and returns — withdrawn, now covered by ASME B16.9
Withdrawn. B16.28 covered wrought steel buttwelding short-radius elbows and returns; those were incorporated into ASME B16.9 in its 2001 edition. It is still quoted on older drawings and material lists.
- Dimensional standards
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is ASME B16.28?
ASME B16.28 covered wrought steel buttwelding short-radius elbows and returns. It has been withdrawn: short-radius elbows were incorporated into ASME B16.9 in its 2001 edition. B16.28 still appears on older drawings and material lists; such references should be read as B16.9 short-radius (1.0D) elbows.
ASME B16.28 at a glance
| Status | Withdrawn — superseded by ASME B16.9 |
|---|---|
| Covered | Short-radius (1.0D) 90° elbows and 180° returns |
| Today | Order to ASME B16.9, short-radius |
Long radius vs short radius
| Long radius (LR) | Short radius (SR) | |
|---|---|---|
| Centre-line radius | 1.5 × NPS | 1.0 × NPS |
| Standard today | ASME B16.9 | ASME B16.9 (formerly B16.28) |
| Pressure drop | Lower | Higher |
| Use | Default choice | Tight spaces |
How to write ASME B16.28 on a purchase order
Name the product, size, material specification and grade, the dimensional standard and the certificate. An example line:
Illustrative only — sizes, tests, inspection level and any project values come from your purchase specification.
ASME B16.28 edition and verification status
Which edition we have confirmed, and what is still being checked before any numerical requirement is published here.
| Current edition | Not yet confirmed against the publisher listing |
|---|---|
| Full-text verification | In progress — numerical requirements are not published on this page |
| Edition on your order | The edition named in your purchase order or design code governs — confirm it with your enquiry |
What to know before ordering to ASME B16.28
The points that decide whether material to ASME B16.28 is accepted at inspection.
- A short-radius elbow has a centre-to-end of 1 × NPS instead of 1.5 × NPS.
- Order to ASME B16.9 today; list B16.28 only if your client specification requires it.
- Pressure ratings of short-radius elbows are lower than long-radius.
How ASME B16.28 fits into an order
A purchase order line is only complete when it names the material standard, the dimensional standard and the inspection document. Miss one and the mill, the inspector and the buyer can each read the order differently.
Standards used with ASME B16.28
Same family
ASME B16.28 — questions buyers ask
What is ASME B16.28?
ASME B16.28 covered wrought steel buttwelding short-radius elbows and returns. It has been withdrawn: short-radius elbows were incorporated into ASME B16.9 in its 2001 edition. B16.28 still appears on older drawings and material lists; such references should be read as B16.9 short-radius (1.0D) elbows.
Can I still order to B16.28?
It is withdrawn. Order ASME B16.9 short-radius elbows; mention B16.28 only if a client specification requires the reference.
What replaced ASME B16.28?
Short-radius (1.0D) elbows and returns are now ordered to ASME B16.9 together with the material specification — for example ASTM A403 for stainless, A234 for carbon and alloy steel, A815 for duplex or B366 for nickel alloys.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026