Specifications, Grit & Finish Guide
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Tube vs. Pipe?
Manufactured to a set outside diameter, tube is expressed as 1.5" OD, .065" wall. Pipe is specified by a nominal, not actual, inside diameter. The wall thickness of pipe is described by the "schedule" such as schedule 40.
|
Tube
OD
|
Tube
ID
|
Wall
Thickness
|
Weight
Dry
|
Volume
|
Weight
with
Water
|
Flow at a Mean Velocity
GPM
|
| Inches |
Inches |
Inches |
lbs/100 ft |
gal/100 ft |
lbs/100 ft |
5 fps |
7 fps |
10 fps |
| 1/4 |
0.180 |
0.035 |
8.1 |
.013 |
9.2 |
0.40 |
0.56 |
0.79 |
| 3/8 |
0.305 |
0.035 |
12.9 |
.038 |
16.0 |
1.14 |
1.59 |
2.28 |
| 1/2 |
0.370 |
0.065 |
30.6 |
0.56 |
35.3 |
1.7 |
2.3 |
3.4 |
| 3/4 |
0.620 |
0.065 |
48.2 |
1.57 |
61.3 |
4.7 |
6.6 |
9.4 |
| 1 |
0.870 |
0.065 |
65.8 |
3.09 |
91.5 |
9.3 |
13 |
19 |
| 1 1/2 |
1.370 |
0.065 |
100.9 |
7.66 |
164.8 |
23 |
32 |
46 |
| 2 |
1.870 |
0.065 |
136.1 |
14.27 |
255.1 |
43 |
60 |
86 |
| 2 1/2 |
2.370 |
0.065 |
171.2 |
22.92 |
362.4 |
69 |
96 |
138 |
| 3 |
2.870 |
0.065 |
206.4 |
33.60 |
486.7 |
101 |
141 |
202 |
| 4 |
3.834 |
0.083 |
351.8 |
59.97 |
851.9 |
180 |
252 |
360 |
| 6 |
5.782 |
0.109 |
694.7 |
136.39 |
1832.2 |
409 |
573 |
818 |
| 8 |
7.782 |
0.109 |
930.6 |
247.07 |
2991.1 |
741 |
1038 |
1482 |
Grit & Finish
| Grit |
Ra (Range, micro-inch) |
| 150 |
30-35 |
| 180 |
20-25 |
| 240 |
15-20 |
| 320 |
9-11 |
Sanitary Tubing: Brief Description by Finish Number
| No. |
Description |
| 1 |
Industrial or mill finish. Bright annealed, pickled, sand blast or tumbled. |
| 3 |
Sanitary. ID polished to #150 grit or 32 Ra, OD mill finish. |
| 3A |
Polished 150 grit OD, 180 grit ID |
| 5 |
Industrial. ID mill finish, OD polish to#150 grit or 32 Ra. |
| 7 |
Sanitary. ID and OD polished to #150 grit or 32 Ra. |
Finish Specifications
| Process |
RA Micro Inch |
RA Micron |
ISO designation |
150 grit
150 grit + Electropolish |
30 - 35
12 - 20 |
0.75 - 0.875
0.3 - .05 |
N6 |
180 grit
180 grit + Electropolish |
20 - 25
10 - 16 |
0.5 - .0625
0.25 - 0.4 |
|
240 grit
240 grit + Electropolish |
15 - 20
8 - 12 |
0.375 - 0.5
0.2 - 0.3 |
N5 |
320 grit
320 grit + Electropolish |
8 - 12
6 - 12 |
0.2 - 0.3
0.15 - 0.3 |
N4 |
Metal Chemistry of Stainless Steel
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Related: Fitting Guide, Gasket Guide, Stainless Steel Grades