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Dimension chart · ASME B16.9 · EN 10253-1

Butt-weld reducer DN 80 × DN 40 (3" × 1½"): dimensions and references

Butt-weld reducer DN 80 × DN 40 (3" × 1½"), OD 88.9 × 48.3 mm: the dimensions in both standards, wall, weight and the 12 available references.

ASME B16.9 and EN 10253-1 dimensions

Dimensioned drawing of a butt-weld concentric reducer
H: end-to-end length. OD1: large end, OD2: small end. T1: small end wall, T2: large end wall. Left, conical reducer; right, with rounded transitions.
ASME B16.9EN 10253-1
Large end OD (mm)88.988.9
Small end OD (mm)48.348.3
Length (mm)89 (H)form 2: 89 · form 1: 108
Wall large / small end (mm)STD 5.49 / 3.68 · XS 7.62 / 5.083.2 / 2.6 (S235)
Indicative weight (kg)STD 0.78 · XS 1.05form 2: 0.90 · form 1: 0.75

Dimensions in mm. Tolerances and definitions in the full chart.

The outside diameter is the same in both standards: 88.9 mm.

Available references

ReferenceStandardItemWallGradeFinishMake
RCS8848STDPASME B16.9Butt-weld concentric reducerSTDA234 WPBPaintedSeamless
RCS8848XSPASME B16.9Butt-weld concentric reducerXSA234 WPBPaintedSeamless
RES8848STDPASME B16.9Butt-weld eccentric reducerSTDA234 WPBPaintedSeamless
RES8848XSPASME B16.9Butt-weld eccentric reducerXSA234 WPBPaintedSeamless
R1S8848GEN 10253-1Butt-weld concentric reducer, Form 13.2 / 2.6S235GalvanizedSeamless
R1W8848GEN 10253-1Butt-weld concentric reducer, Form 13.2 / 2.6S235GalvanizedWelded
R1S8848NEN 10253-1Butt-weld concentric reducer, Form 13.2 / 2.6S235BlackSeamless
R1W8848NEN 10253-1Butt-weld concentric reducer, Form 13.2 / 2.6S235BlackWelded
R2S8848GEN 10253-1Butt-weld concentric reducer, Form 23.2 / 2.6S235GalvanizedSeamless
R2W8848GEN 10253-1Butt-weld concentric reducer, Form 23.2 / 2.6S235GalvanizedWelded
R2S8848NEN 10253-1Butt-weld concentric reducer, Form 23.2 / 2.6S235BlackSeamless
R2W8848NEN 10253-1Butt-weld concentric reducer, Form 23.2 / 2.6S235BlackWelded

12 references of this size in the catalog. Click a reference for its page and to add it to your quote.

See the whole catalog → All references of the family

Other sizes

Frequently asked questions

How long is a 3" × 1½" reducer?

89 mm to ASME B16.9, concentric or eccentric. To EN 10253-1 form 2: 89 mm.

Which finishes are available for this fitting?

In the catalog: black, galvanized, painted. EN 10253-1 fittings in S235 come black or galvanized; ASME B16.9 fittings in A234 WPB are delivered painted.