DIN1629 seamless steel pipes application fields are: chemical plant, vessels, pipework construction and for common mechanical engineering purposes. normally DIN1629 standard are manufactured with no limiting working pressure values. working temperature is limited below 300℃.
DIN1629 is the standard specifies the seamless circular tubes of non alloys steels with special quality requirements.
DIN1629 applications the overheated boilers, as minimum thickness ferrite and seamless steel pipes, and as heat exchangers via austenitic pipes.
DIN1629 steel pipe mechanical property:
| mechanical properties |
| steel grade |
tensile strength(mpa) |
yield point(mpa) |
elongation(%)l |
elongation(%)t |
| st37 |
350-480 |
≥235 |
≥25 |
≥23 |
| st44 |
420-550 |
≥275 |
≥21 |
≥19 |
| st52.0 |
500-650 |
≥355 |
≥21 |
≥19 |
DIN1629 steel pipe equivalent steel grade:
| din 1629 |
en |
bs nfa 49.210/49.112 |
astm 53 |
| grade st 37 |
en 10216.1grade p235 t1 |
grade tu 37 b tu e 220 a |
grade b |
| grade st 44 |
en 10216.1grade p275t1 |
grade tu 42 b tu e 235 a |
grade b |
| grade st 52-0 |
en 10216-3grade p355n |
nfa grade p355n |
asme sa 381 grade y 52 |
anson can supply DIN1629 steel pipe from stock or from reputed steel mills. we also offer steel fabrication service where steel pipe can go through processings like cutting (any size and any shape), drilling, welding, milling, machining as you require. if you are interested in buying DIN1629 steel pipe products, contact us now for the latest price or check the following table for equivalent steel grade of DIN1629.
elevated temperature upper yield stress values of DIN1629 steel pipe
| steel grade |
yield stress value by working temperature(thickness increasing) |
| 50℃ |
200℃ |
250℃ |
300℃ |
| st 37 |
235-215 |
185-170 |
165-150 |
140-130 |
| st 44 |
275-255 |
215-200 |
195-180 |
165-155 |
| st 52 |
355-335 |
248-230 |
225-210 |
195-185 |
outer diameter deviation of structural steel pipe
| outer diameter (mm) |
outside diameter deviation |
| pipe body and pipe end |
pipe end: it needs to be specially dealed. |
| ≤ 100 |
±1%d or ±0.5mm |
± 0.4 mm |
| 100 < d ≤ 200 |
±1%d |
± 0.5 % d |
|
> 200
|
±1%d
|
± 0.6% d |
note: a. pipe end refers to the place within 100 mm to the pipe port.
DIN1629 wall thickness allowable deviation
| d ≤ 130 mm |
130 < d ≤ 320 mm |
320 < d ≤ 660 mm |
| s |
| ≤ 2sn |
2sn < s ≤ 4sn |
> 4sn |
≤ 0.05d |
0.05d < s ≤ 0.11d |
>0.11d |
≤ 0.05d |
0.05d < s ≤ 0.09d |
> 0.09d |
| +15% -10% |
+12.5%
-10% |
± 9% |
+17.5%
-12.5% |
± 12.5% |
±10% |
+20%
-15% |
+15%
-12.5% |
+12.5%
-10% |
note: sn is the length deviation of DIN1629 with standard
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