Concentric Reducers
Seamless butt-weld reducers that change pipe diameter on a shared axis — the standard transition for vertical lines and general size changes.
Technical Data
| Concentric Reducers — specification | |
|---|---|
| Size range | 1″–24″ DN25–600 |
| Geometry | Shared axis concentric |
| Schedule | SCH 10–XXS each end |
| Core grade | A234 WPB + WPL6 LT |
| Standard | ASME B16.9 / EN 10253-2 (formerly DIN 2616) |
| Grade | A234 WPB · WPL6 (LT) |
| Ends | Butt-weld, bevelled |
| ASME B16.9 / A234 | WPA · WPB |
| EN 10253-2 | P235 · P265 · S235 · S265 |
| DIN 2616 | St35.8 · St37 · St44 |
Key points
- In-line diameter transitions (vertical)
- Pump & compressor connections
- Oil, gas & petrochemical
- Power plant & water systems
- General process piping
Drawing & Dimensions
Dimensioned drawing from the YTM Pipe catalogue. Dimensions to ASME B16.9 / EN 10253 — complete tables in the datasheet download.
Click the drawing to enlargeDatasheet & Documents
The official Concentric Reducers datasheet — specification, materials, standards and the complete dimension tables.
ISO 9001:2015 certified quality
How to Order
Worked example
CONC REDUCER · 12″ × 8″
ASME B16.9 · SCH 40
ASTM A234 WPB
Butt-weld bevel
MTC EN 10204 3.1Also in This Range
Questions & Answers
What is a concentric reducer?
A concentric reducer is a cone-shaped buttweld fitting that changes pipe size while keeping both ends on the same centreline. It is the standard choice for vertical lines and wherever the pipe centreline should stay constant.
What is the difference between a concentric and an eccentric reducer?
A concentric reducer keeps both ends on a common centreline, so it suits vertical runs. An eccentric reducer offsets the centrelines so one side stays flat — installed flat-side-up it prevents air pockets on pump suction lines, and flat-side-down it lets a horizontal line drain completely.
What size range do you supply for concentric reducers?
1″–24″ DN25–600. Other sizes can usually be supplied on request — send your requirement for confirmation.
Which standards and grades are available?
ASME B16.9 / A234: WPA · WPB · EN 10253-2: P235 · P265 · S235 · S265 · DIN 2616: St35.8 · St37 · St44. See the datasheet for the complete list.
What materials are offered?
A234 WPB · WPL6 (LT).
Is a technical datasheet available?
Yes — the official YTM Pipe datasheet with dimensions, materials and standards can be downloaded on this page.
How do I get a price?
Send size, specification and quantity through the Request-a-Quote form, WhatsApp or [email protected] — our team responds within one business day.
Concentric Reducers. Specified. Checked. Delivered.
Manufactured and supplied to the governing standard, inspected and documented before dispatch.