Concentric reducer
The two ends share a common centre line.
LEKE PIPING / PRODUCTS
Concentric & Eccentric Pipe Reducers
Concentric reducers have a common centre line; eccentric reducers have an offset centre line. Specify both end sizes and wall thicknesses, plus eccentric orientation where required.
PRODUCT DETAILS
Specify the connection completely.
We can also make custom sizes, wall thicknesses and other dimensions to your drawing. Send the pipe-end requirements and your drawing with your RFQ so we can confirm the details.
| Parameter | Details to confirm |
|---|---|
| Type | Concentric or eccentric |
| End dimensions | Large-end and small-end outside diameters and end preparation |
| Wall | Wall thickness / schedule at each end |
| Geometry | End-to-end length and eccentric flat-side orientation, where applicable |
| Reference | Applicable fitting standard and edition, or drawing number and revision |
Product dimensions, material grades and documentation are confirmed against your enquiry and applicable project requirements.
Primary dimensional reference: ASME B16.9 (overall scope NPS 1/2–48; check the reducer table). Confirm the product type, edition and applicable size before order.
DIMENSIONAL REFERENCE
Pipe Reducer dimensional drawing.
Use the section view to identify the dimensions to confirm in your enquiry.
Views shown separately for legibility. The full original drawing remains available below.
View full-size drawing ↗Reading this drawing
- D₁ / D₂
- Large / small end diameters in the concentric view
- D
- End diameter labels in the eccentric view; confirm large and small values
- T₁ / T₂
- Large / small end wall thicknesses
- H
- End-to-end length indicated by the drawing
- R(C)
- Additional source notation; confirm against the selected dimension table
- A
- Additional source notation in the eccentric view; confirm against the selected table
Symbols describe this supplied drawing. Confirm their correspondence with the selected standard and dimension table; notation may differ.
Illustrative geometry only. Confirm size, wall thickness, dimensions, tolerances and the applicable standard edition in the selected table or approved drawing.
PRODUCT VIEWS
Pipe reducers — closer look.
Compare the product views. Use the dimensional drawings and confirmed specifications for your order.
SELECTION & ENQUIRY
The details that make the difference.
Eccentric reducer
The centre lines are offset; show the required flat side and installation orientation on the drawing.
Complete the geometry
Specify each end outside diameter, wall thickness or Schedule, end preparation and end-to-end length.
TECHNICAL REFERENCES
Check dimensions before your RFQ.
ASME B16.9 — Reducer Dimensions
Butt-weld fitting dimensions and geometry
Check the applicable ASME B16.9 reducer table, edition, units and size range. Provide a dimensioned drawing and revision for non-standard geometry.
Concentric & Eccentric Pipe Reducer — weight estimate
Use the existing calculator for preliminary estimates. Confirm the final dimensions, material and actual product weight separately.
COMMON QUESTIONS
Before you send the enquiry.
How do I choose between concentric and eccentric reducers?
The piping arrangement and project specification determine the configuration. Provide the layout or orientation requirement so the proposed reducer can be reviewed in context.
Can the two ends have different wall requirements?
State the wall requirement at each end explicitly so the configuration and manufacturing requirements can be reviewed.
How should reducer sizes be written?
State the large-end and small-end sizes, the required wall at each end and the overall length. Identify concentric or eccentric geometry explicitly.
How do I define the orientation of an eccentric reducer?
Show the required flat side and installation orientation on the piping or fabrication drawing. A product image alone does not define the installed position.
Can I choose a reducer using nominal sizes only?
Nominal end sizes do not define all dimensions. Confirm actual end dimensions, wall requirements, length, material and the applicable specification.
Is a socket weld reducer insert the same product?
No. A socket weld reducer insert and a butt weld pipe reducer have different connection geometry. Use the required connection description and a section drawing to identify the correct item.
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View product details →Need Concentric & Eccentric Pipe Reducers?
Request a quote for this product →Specify concentric or eccentric type, both end sizes and walls, length, material grade and quantity. Include the standard edition and drawing revision.
SEND YOUR REQUIREMENT
From your specification
to a clearer quotation.
Email your reducer list with quantities, drawing revisions, destination and required date.
USEFUL TO INCLUDE
- Large and small end sizes
- Wall thickness / schedule at both ends
- Concentric or eccentric type and orientation
- Material, standard, quantity and drawing
The quotation will confirm supply scope, required documents and delivery terms.