Type 7 28 FPI Fine-Fin with Internal Rib
Type
7
28 FPI Fine-Fin
with Internal Rib
Materials:
Austenitic Stainless Steel: 304, 316, 321. |
28 |
fins per inch |
| 1102 |
fins per meter | | .026 | (Inches) average fin height | | .660 | (mm) average fin height | | .012 | (Inches) average fin thickness | | .305 | (mm) average fin thickness |
|
| Part Number | Plain Section Average Diameter | Plain Section Average Wall | Wall Under Fin Average | Wall Under Fin Minimum | Nominal Root Diameter | Fin Section I.D. | Outside Area Ao | Inside Area Ai | Area Ratio Ao/Ai | I.D. Cross Section Area |
| (Inches) | (Inches) | (Inches) | (Inches) | (Inches) | (Inches) | (Ft2/Ft) | (Ft2/Ft) |
| (Inches2) |
| (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | (m2/m) | (m2/m) |
| (cm2) | |
285028-
204610 | .750 | .049 |
.028 |
.025 |
.680 |
.624 |
.501 |
.193 |
2.596 |
.300 |
| 19.050 | 1.245 |
.711 |
.635 |
17.272 |
15.850 |
.153 |
.059 |
|
1.935 |
| |
285035-
204610 | .750 |
.058 |
.035 |
.031 |
.680 |
.610 |
.501 |
.190 |
2.637 |
.285 |
| 19.050 |
1.473 |
.889 |
.787 |
17.272 |
15.494 |
.153 |
.058 |
|
1.839 |
|
 |
| D - Outside Diameter of Plain End | Wf - Wall Thickness Under Fin | | Di - Inside Diameter of Plain End | Fh - Height of Fin | | dr - Root Diameter | Fm - Mean Fin Thickness | | do - Diameter Over Fins | P - Mean Rib Pitch | | di - Inside Diameter of Fin Section | Rh - Height of Rib | | W - Wall Thickness of Plain End | Ha - Rib Helix Angle | IDENTIFYING THE ID RIB:
Example: Part Number 204610 | | 20: number of ribs
46: helix angle of ribs
10: rib height in 1000ths of an inch | |
