Steel for butt welding elbows
The elbows are made of steel, which is located above in the survey table and is divided according to purpose of use. The elbows meet the requirements of NACE MR 0175.
Butt welding elbows
Butt welding elbows are produced by extrusion pressing. The semi-finished product is rolled seamless steel tubes.
Butt-welds are mainly used as part of the construction of pipelines, energy engineering and mining industry.
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Dimensions of butt welding elbows
Marking of dimensions of the butt welding elbows type K (90°) and DK (180°) type 3
| Standard | Symbols |
| DIN 2605 | DN | d | s | r | B | 2b | b |
| NF A 49 186 | DN | D | T | r | F | C | B |
| EN 10 253 | DN | D | T | (R) | F | C | B |
| BS 1965 | NPS | (OD) | (WT) | (R) | A | O | K |
| ASME B 16.9 | NPS | D | A | O | K |
Dimensions are given in tables according to EN standards and in accordance with ASME standards.
| Dimensional | standard | SIZES (OD x WT) | Dimensional table |
|---|---|---|---|
| EN | 10253-2 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | Dimensional table |
| Withdrawn standards They may still be used occasionally | |||
| DIN | 2605-1, 2 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | Dimensional table |
| Dimensional | standard | SIZES (OD x WT) | Dimensional table |
|---|---|---|---|
| EN | 10253-2 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | Dimensional table |
| ASME | ASME B16.9 | 33.4 x 3.38 – 114.3 x 6.02 mm [1.315 x 0.133 – 4.5 x 0.237 in] [1 – 4 NPS] | Dimensional table |
| Withdrawn standards They may still be used occasionally | |||
| PN ŽP | ŽP 42 5760 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | Dimensional table |
| Dimensional | standard | SIZES (OD x WT) | Dimensional table |
|---|---|---|---|
| EN | 10253-2 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | Dimensional table |
| Withdrawn standards They may still be used occasionally | |||
| DIN | 2605-1, 2 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | Dimensional table |
| NF A | 49-186 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | Dimensional table |
| NF A | 49-281 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | Dimensional table |
| PN ŽP | ŽP 42 5760 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | Dimensional table |
| Dimensional | standard | SIZES (OD x WT) | Dimensional table |
|---|---|---|---|
| DIN | 2605-1 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | |
| PN ŽP | ŽP 42 5760 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] |
| Dimensional | standard | SIZES (OD x WT) | Dimensional table |
|---|---|---|---|
| EN | 10253-1 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | Dimensional table |
| Withdrawn standards They may still be used occasionally | |||
| DIN | 2605-1, 2 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | Dimensional table |
| PN ŽP | ŽP 42 5760 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | Dimensional table |
| Dimensional | standard | SIZES (OD x WT) | Dimensional table |
|---|---|---|---|
| EN | 10253-2 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | Dimensional table |
| Withdrawn standards They may still be used occasionally | |||
| DIN | 2605-1, 2 | 21.3 x 2.0 – 168.3 x 4.50 mm [15 – 150 DN] [1/2 – 6 NPS] | Dimensional table |
Dimensional tolerances of the butt welding elbows
Exact values are given in relevant standards. Indicative figures are arranged in a table of tolerances.
Testing of butt welding elbows
The input tubes and ready made elbows and are tested in accordance with the requirements of relevant standards.
The elbow ends
The elbows are supplied with smooth, square cut ends.
Upon agreement the elbow ends can be modified for the weld according to following standards:
• EN 10 253
• ASME B16.9
• DIN 2559
• STN, ČSN 13 1075
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Packaging of butt welding elbows
The elbows are packed:
(a) in cardboard boxes put on wooden pallets; or
(b) delivered in metal pallets.
Marking of the butt welding elbows
The elbows are supplied with the following markings:
(a) without marking,
(b) with marking the type of steel according to the relevant color standard,
(c) stamping the data according to standards or customer requirements with respect to the space available on the surface of the elbow.
Butt welding elbows are delivered with certificates according to standards:
EN 10 204,
ASTM A234/A234, A420/A420M,
DIN 50049,
STN/ČSN 42 0165, 42 0250, 42 0251.
The elbows are delivered:
(a) without surface preservatives or
(b) surface treated by blasting.
Upon agreement it is possible to have temporarily surface protection by oiling it.
The elbows produced by hot forming are available without heat treatment, annealing is included in the normalized forming.
Upon agreement the outer surface can be machined by blasting.
