DIN piping standards
Deutsches Institut für Normung (Germany, legacy): Older German standards, largely replaced by EN but still quoted on drawings and enquiries. 15 standards most used in piping, flanges, fittings, valves and materials.
| Standard | Covers | Category | On this site |
|---|---|---|---|
| DIN 1629 | Seamless circular tubes of non-alloy steels with special requirements | Pipe | Open → |
| DIN 2391 | Seamless precision steel tubes | Pipe | Open → |
| DIN 2440 / 2441 | Medium and heavy threaded steel tubes | Pipe | Open → |
| DIN 2448 | Seamless steel tubes — dimensions and masses | Pipe | Open → |
| DIN 2458 | Welded steel tubes — dimensions and masses | Pipe | Open → |
| DIN 2501 | Flanges — connecting dimensions | Flanges | Open → |
| DIN 2527 | Blind flanges | Flanges | Open → |
| DIN 2573 / 2576 | Plate (flat) welding flanges PN 6 / PN 10 | Flanges | Open → |
| DIN 2632–2635 | Weld neck flanges PN 10, 16, 25, 40 | Flanges | Open → |
| DIN 2605 | Buttwelding elbows | Fittings | Open → |
| DIN 2615 | Buttwelding tees | Fittings | Open → |
| DIN 2616 | Buttwelding reducers | Fittings | Open → |
| DIN 2617 | Buttwelding caps | Fittings | Open → |
| DIN 17175 | Seamless tubes of heat-resistant steels | Pipe | Open → |
| DIN 17456 / 17457 | Seamless and welded austenitic stainless tubes | Pipe | Open → |
Subjects are short summaries, not official titles. Always buy the current edition from the issuing body; check which edition your project specification names.
Frequently asked questions
Which DIN standards cover piping?
DIN 1629 (seamless circular tubes of non-alloy steels with special requirements); DIN 2391 (seamless precision steel tubes); DIN 2440 / 2441 (medium and heavy threaded steel tubes); DIN 2448 (seamless steel tubes — dimensions and masses); DIN 2458 (welded steel tubes — dimensions and masses); DIN 2501 (flanges — connecting dimensions) and others listed on this page.
Last updated 2026-11-02