Fistula ferro inconsutilem pro usu aedificationis navis praecipue adhibentur pro gradu 1& 2 pressura fistulae in limbis systematis, boiler et super-calefacta unitas navis aedificationis.
Exemplar N0． maioris ferri tubi: 320，360，410，460，490，etc．
Magnitudines:
| Genera ferro fistulae | E diametro | murum crassitudine | ||
| Frigido-revolvit fistulae | Tubus magnitudinum (mm) | Tolerantiae (mm) | Tubus magnitudinum (mm) | Tolerantiae (mm) |
| ＞30-50 | ±0.3 | ≤30 | ±10% | |
| 50-219 | ±0.8% | |||
| Hot-advolvit fistulae | 219 | ±1.0% | ＞20 | ±10% |
Compositio chemica:
| Exempla ferro fistulae | Compositio chemica (%) | ||||
| C | Si | Mn | P | S | |
| 320 | ≤0.16 | ≤0.35 | 0.40-0.70 | ≤0.035 | ≤0.035 |
| 360 | ≤0.17 | ≤0.35 | 0.40-0.80 | ≤0.035 | ≤0.035 |
| 410 | ≤0.21 | ≤0.35 | 0.40-1.20 | ≤0.035 | ≤0.035 |
| 460 | ≤0.22 | ≤0.35 | 0.80-1.40 | ≤0.035 | ≤0.030 |
| 490 | ≤0.23 | ≤0.35 | 0.80-1.50 | ≤0.035 | ≤0.030 |
Mechanica proprietatibus
| Exempla ferro fistulae | Roboris distrahentes (MPa) | Vires cede (MPa) | Prolongatio (%) |
| 320 | 320-410 | ≥195 | ≥25 |
| 360 | 360-480 | ≥215 | ≥24 |
| 410 | 410-530 | ≥235 | ≥22 |
| 460 | 460-580 | ≥265 | ≥21 |
| 490 | 490-610 | ≥285 | ≥21 |
Post tempus: Feb-10-2023