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

Butt-weld reducer DN 40 × DN 25 (1½" × 1"): dimensions and references

Butt-weld reducer DN 40 × DN 25 (1½" × 1"), OD 48.3 × 33.7 / 33.4 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)48.348.3
Small end OD (mm)33.433.7
Length (mm)64 (H)form 2: 64 · form 1: 55
Wall large / small end (mm)STD 3.68 / 3.38 · XS 5.08 / 4.552.6 / 2.6 (S235)
Indicative weight (kg)STD 0.22 · XS 0.29form 2: 0.24 · form 1: 0.16

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

The outside diameter is the same in both standards: 48.3 mm.

Available references

ReferenceStandardItemWallGradeFinishMake
RCS4833STDPASME B16.9Butt-weld concentric reducerSTDA234 WPBPaintedSeamless
RCS4833XSPASME B16.9Butt-weld concentric reducerXSA234 WPBPaintedSeamless
RES4833STDPASME B16.9Butt-weld eccentric reducerSTDA234 WPBPaintedSeamless
RES4833XSPASME B16.9Butt-weld eccentric reducerXSA234 WPBPaintedSeamless
R1S4833GEN 10253-1Butt-weld concentric reducer, Form 12.6 / 2.6S235GalvanizedSeamless
R1W4833GEN 10253-1Butt-weld concentric reducer, Form 12.6 / 2.6S235GalvanizedWelded
R1S4833NEN 10253-1Butt-weld concentric reducer, Form 12.6 / 2.6S235BlackSeamless
R1W4833NEN 10253-1Butt-weld concentric reducer, Form 12.6 / 2.6S235BlackWelded
R2S4833GEN 10253-1Butt-weld concentric reducer, Form 22.6 / 2.6S235GalvanizedSeamless
R2W4833GEN 10253-1Butt-weld concentric reducer, Form 22.6 / 2.6S235GalvanizedWelded
R2S4833NEN 10253-1Butt-weld concentric reducer, Form 22.6 / 2.6S235BlackSeamless
R2W4833NEN 10253-1Butt-weld concentric reducer, Form 22.6 / 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 1½" × 1" reducer?

64 mm to ASME B16.9, concentric or eccentric. To EN 10253-1 form 2: 64 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.