NF A 49-211
NF A 49-211 (Steel tubes. Seamless plain-end unalloyed steel tubes for fluid piping at elevated temperatures. Dimensions. Technical delivery conditions)· AFNOR NF (France) · 3 materials
| Designation | Material group | |
|---|---|---|
| TU E 220 | Structural and constructional steels | chevron_right |
| TU E 250 | Structural and constructional steels | chevron_right |
| TU E 275 | Structural and constructional steels | chevron_right |