en-10253-1-type-3d-elbow

All dimensions are in "mm" unless noted otherwise specified.
All weights are in "kg".

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Download the PDF fileEN-10253-1-butt-weld-fittings-2007

EN 10253-1 BUTT WELDING PIPE FITTINGS
ELBOW 2DELBOW 3DELBOW 5DREDUCER FORM 1REDUCER FORM 2
EQUAL TEESREDUCING TEESDISHED ENDSCAPSTolerance

1. Technical drawings of 90°, 45° & 180° elbows of type 3D

3D ELBOW

3D ELBOW

180° elbows are also called return bends. For type 3D, the center-to-end radius R is approximately equal to 1.5*D.

2. Dimensions of 90°, 45° & 180° elbows of type 3D

DNDTHFCB
1521.32.012295638
2026.92.312295743
2533.72.616387656
38.02.619459064
3242.42.620489570
44.52.6225110273
4048.32.6245711483
54.02.62868.513795
57.02.92972144100
5060.32.93576152106
70.02.93892184127
6576.12.94495191132
8088.93.247114229159
101.63.655133267184
108.03.658142.5285196
100114.33.663152305210
133.04.075181362247
125139.74.079190381262
159.04.590216432295
150168.34.595229457313
175193.75.6112270540367
200219.16.3127305610414
244.56.3141340680462
250273.06.3159381762518
300323.97.1190457914619
350355.68.02225331067711
400406.48.82546101219813

*D: Outside diameter of elbows or return bends. H: Face to center distance for 45° elbows.

*F: Center-to-end radius of the elbow. B: Face to top length for return bends.

*C: Center-to-center length of the return bend. T: Wall thickness.

 *All dimensions are in mm unless otherwise specified.

1. Tolerances on dimension according to EN 10253-1

1) All diameters of EN 10253-1 pipe fittings shall be measured at the welding ends of the fittings. The tolerance is ±1% or ±0.5 mm whichever is the greater.

2) In order to ensure the flow-way area through the fitting is not excessively reduced, the internal diameter(not applicable to dished ends and caps) shall be greater than 80% of the theoretical internal diameter(ID), as calculated by: ID = OD - 2T.

3) Tolerances for ovality are:

at the welding ends: 2%;

on the body for elbows and return bends: 4%.

The ovality(Ov) shall be calculated by:

Ov = 200 * (Dmax - Dmin) / (Dmax + Dmin) in %.

Dmax: maximum measured diameter in one section.

Dmin: minimum measured diameter in one section.

4) Wall thickness tolerances

DTTolerance
mmmmminusplus
≤406.4≤4
>4
-12.50%0.35

 *D: Outside diameter at the welding end. T: Wall thickness.

 *The minus tolerance also applies to the body of the fitting.

5) Tolerances on specific dimensions

DF-G-HBCKL
≤114.3±2±7±7±4±2
114.3<D≤219.1±2±7±7±7±3
219.1<D≤406.4±3±7±10±7±5

 *D: outside diameter;

 *F: distance from the axis of the center line to the face of the branch outlet of equal tee.

 *G: distance from the axis of the center line to the face of the branch outlet of reducing tee.

 *H: Face to center-line distance for 45°.

 *B: Face to top distance for 180° return bends.

 *C: Center to center distance for 180° return bends.

 *K: height of dished ends or caps.

 *L: Face to face length of reducers(both concentric & eccentric).

6) Tolerances on the form of fittings

The tolerance on the form of each type of fitting Q = 1% of the outside diameter(D) or 1 mm, whichever is greater. See the figure illustrated below.

2. End finish of EN 10253-1 butt welding pipe fittings

According to DIN EN 10253-1,
for wall thickness T < 3.0 mm, the ends may be plain or slightly chamfered.
for wall thickness T ≥ 3.0 mm, the ends shall be bevelled with an angle of 30 degrees to 35 degrees with a face of 1.6 mm ± 0.8 mm.
The welding ends of EN 10253-1 pipe fittings shall be free from harmful blurs.
Specially, the ends of dished ends with diameter ≥ 159 mm shall be bevelled with an angle of  30 degrees to 35 degrees with a face of 1.6 mm ± 0.8 mm.