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

Butt-weld reducer DN 100 × DN 65 (4" × 2½"): dimensions and references

Butt-weld reducer DN 100 × DN 65 (4" × 2½"), OD 114.3 × 76.1 / 73.0 mm: the dimensions in both standards, wall, weight and the 8 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)114.3114.3
Small end OD (mm)73.076.1
Length (mm)102 (H)form 2: 102 · form 1: 114 (not in catalog)
Wall large / small end (mm)STD 6.02 / 5.16 · XS 8.56 / 7.013.6 / 2.9 (S235)
Indicative weight (kg)STD 1.35 · XS 1.87form 2: 1.60

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

The outside diameter is the same in both standards: 114.3 mm.

Available references

ReferenceStandardItemWallGradeFinishMake
RCS11473STDPASME B16.9Butt-weld concentric reducerSTDA234 WPBPaintedSeamless
RCS11473XSPASME B16.9Butt-weld concentric reducerXSA234 WPBPaintedSeamless
RES11473STDPASME B16.9Butt-weld eccentric reducerSTDA234 WPBPaintedSeamless
RES11473XSPASME B16.9Butt-weld eccentric reducerXSA234 WPBPaintedSeamless
R2S11476GEN 10253-1Butt-weld concentric reducer, Form 23.6 / 2.9S235GalvanizedSeamless
R2W11476GEN 10253-1Butt-weld concentric reducer, Form 23.6 / 2.9S235GalvanizedWelded
R2S11476NEN 10253-1Butt-weld concentric reducer, Form 23.6 / 2.9S235BlackSeamless
R2W11476NEN 10253-1Butt-weld concentric reducer, Form 23.6 / 2.9S235BlackWelded

8 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 4" × 2½" reducer?

102 mm to ASME B16.9, concentric or eccentric. To EN 10253-1 form 2: 102 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.