Products
Type 1 30 FPI Fine-Fin
Type 1
30 FPI Fine-Fin ®

MATERIALS: Titanium; Zirconium; C-276; G30; B-2;
C-22; 20Cb-3; AL6XN
30 fins per inch
1181 fins per meter
032 (inches) average fin height
.813 (mm average fin height
.011 (inches) average fin thickness
.279 (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) (Ft 2 /Ft) (Ft 2 /Ft)
(Inches 2 )

(mm) (mm) (mm) (mm) (mm) (mm) (m 2 /m) (m 2 /m)
(cm 2 )

304028

.625 .049 .028 .025 .561 .505 .411 .132 3.114 .200

15.875 1.245 .711 .635 14.249 12.827 .125 .040
1.292

304035

.625 .058 .035 .031 .561 .491 .411 .129 3.186 .189

15.875 1.473 .889 .787 14.249 12.471 .125 .039
1.222

304042

.625 .065 .042 .037 .561 .477 .411 .125 3.288 .179

15.875 1.651 1.067 .940 14.249 12.116 .125 .038
1.153

304049

.625 .072 .049 .044 .561 .463 .411 .121 3.397 .168

15.875 1.829 1.245 1.118 14.249 11.760 .125 .037
1.086

304065

.625 .083 .065 .058 .561 .431 .411 .113 3.637 .146

15.875 2.108 1.651 1.473 14.249 10.947 .125 .034
.941

305028

.750 .049 .028 .025 .686 .630 .500 .165 3.030 .312

19.050 1.245 .711 .635 17.424 16.002 .152 .050
2.011

305035

.750 .058 .035 .031 .686 .616 .500 .161 3.106 .298

19.050 1.473 .889 .787 17.424 15.646 .152 .049
1.923

305042

.750 .065 .042 .037 .686 .602 .500 .158 3.165 .285

19.050 1.651 1.067 .940 17.424 15.291 .152 .048
1.836

305049

.750 .072 .049 .044 .686 .588 .500 .154 3.247 .272

19.050 1.829 1.245 1.118 17.424 14.935 .152 .047
1.752

305065

.750 .083 .065 .058 .686 .556 .500 .146 3.425 .243

19.050 2.108 1.651 1.473 17.424 14.122 .152 .045
1.566

305083

.750 .109 .083 .074 .686 .520 .500 .136 3.676 .212

19.050 2.769 2.108 1.880 17.424 13.208 .152 .041
1.370

306028

.875 .049 .028 .025 .811 .755 .587 .198 2.965 .448

22.225 1.245 .711 .635 20.599 19.177 .179 .060
2.888

306035

.875 .058 .035 .031 .811 .741 .587 .194 3.026 .431

22.225 1.473 .889 .787 20.599 18.821 .179 .059
2.782

306042

.875 .065 .042 .037 .811 .727 .587 .190 3.089 .415

22.225 1.651 1.067 .940 20.599 18.466 .179 .058
2.678

306049

.875 .072 .049 .044 .811 .713 .587 .187 3.139 .399

22.225 1.829 1.245 1.118 20.599 18.110 .179 .057
2.576

306065

.875 .083 .065 .058 .811 .681 .587 .178 3.298 .364

22.225 2.108 1.651 1.473 20.599 17.297 .179 .054
2.350

306083

.875 .109 .083 .074 .811 .645 .587 .169 3.473 .327

22.225 2.769 2.108 1.880 20.599 16.383 .179 .052
2.108

307035

1.000 .058 .035 .031 .936 .866 .671 .227 2.956 .589

25.400 1.473 .889 .787 23.774 21.996 .205 .069
3.800

307042

1.000 .065 .042 .037 .936 .852 .671 .223 3.009 .570

25.400 1.651 1.067 .940 23.774 21.641 .205 .068
3.678

307049

1.000 .072 .049 .044 .936 .838 .671 .219 3.064 .552

25.400 1.829 1.245 1.118 23.774 21.285 .205 .067
3.558

307065

1.000 .083 .065 .058 .936 .806 .671 .211 3.180 .510

25.400 2.108 1.651 1.473 23.774 20.472 .205 .064
3.292

307083

1.000 .109 .083 .074 .936 .770 .671 .202 3.322 .466

25.400 2.769 2.108 1.880 23.774 19.558 .205 .062
3.004
D - Outside Diameter of Plain End W - Wall Thickness of Plain End
D i - Inside Diameter of Plain End W f - Wall Thickness Under Fin
d r - Root Diameter F h - Height of Fin
d o - Diameter Over Fins F m - Mean Fin Thickness
d i - Inside Diameter of Fin Section
DEFINITION OF HPT PART NUMBER
Example: 365028

36: fins per inch
5: root diameter (reference) in eights of a n inch
028: wall thickness under fin in thousands of an inch

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