NA 131
DIN Standards Committee Aerospace
DIN EN 4556 [CURRENT] references following documents:
| Document number | Edition | Title |
|---|---|---|
| EN 4553 | 2003-02 | Aerospace series - Pipe coupling 37°, spherical, in heat resisting steel - Elbow 90° nipples, welded end; Inch series More |
| EN 4554 | 2003-02 | Aerospace series - Pipe coupling 37°, spherical, in heat resisting steel - Straight unions, threaded; Inch series More |
