Eccentric Reducers
Seamless butt-weld reducers with the outlet offset so one side stays flat — used at pump suctions and in horizontal lines to avoid air pockets and keep runs drainable.
Technical Data
| Eccentric Reducers — specification | |
|---|---|
| Size range | 1″–24″ DN25–600 |
| Geometry | Flat side offset axis |
| 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
- Pump suction lines (avoid air pockets)
- Horizontal diameter transitions
- Oil, gas & petrochemical
- Water & wastewater plants
- Process & utility 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 Eccentric Reducers datasheet — specification, materials, standards and the complete dimension tables.
ISO 9001:2015 certified quality
How to Order
Worked example
ECC REDUCER · 10″ × 6″ (FOB)
ASME B16.9 · SCH 40
ASTM A234 WPB
Butt-weld bevel
MTC EN 10204 3.1Also in This Range
Questions & Answers
What is an eccentric reducer?
An eccentric reducer changes pipe size with the two ends offset rather than sharing a centreline, so one side of the fitting stays flat. This lets horizontal lines drain or avoid trapping air where a concentric reducer would not.
Should the flat side be up or down?
Flat side up (FOT) is used on pump suction lines so air cannot collect at the high point and cavitate the pump. Flat side down (FOB) is used where the line must drain completely. State FOT or FOB when ordering.
What size range do you supply for eccentric 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.
Eccentric Reducers. Specified. Checked. Delivered.
Manufactured and supplied to the governing standard, inspected and documented before dispatch.