en-10253-1-type-5d-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 5D

5D ELBOW

180° elbows are also called return bends. For type 5D, the center-to-end radius R is approximately equal to 2.5*D.

2. Dimensions of 90°, 45° & 180° elbows of type 5D

DNDTHFCB
1521.32.01842.58553
2026.92.32457.511571
2533.72.63072.514589
38.02.63482.5165101
3242.42.63892.5185114
44.52.64097.5195120
4048.32.645107.5215132
54.02.651122.5245149
57.02.953130260158
5060.32.956135270165
70.02.966160320195
6576.12.973175350213
8088.93.286205410250
90101.63.698235470286
108.03.6105253506306
100114.33.6112270540327
133.04.0129311.5623378
125139.74.0137330660400
159.04.5155375750454
150168.34.5162390780474
200219.16.32115101020620
244.56.32405801160702
250273.06.32696501300786
300323.97.13217751550937
350355.68.035285017001026
400406.48.840297019401173

*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.