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Flow Meter Selection GuideMesh to Micron Conversions / ANSI 150lb Flange Dimensions

With so little time to do so much during the course of my workday, I place a lot of value on my reference materials. That said, I thought it would be a good time to share some of my more useful charts, tables and tips.

The Mesh to Micron Chart on the left is very handy when working with filtration products and strainers. The ANSI 150 Class Pipe specifications on the right come in handy when working with large flow meters, valves, etc.. And if you've ever wondered how to convert from Centistokes to Centipoises and/or Vice-Versa, check out the tip at the bottom of the page.


Mesh to Micron Conversion Chart   ANSI/ASME B16.5-1996 Class 150
U.S. Mesh Inches Microns Millimeters
3 0.265 6730 6.73
4 0.187 4760 4.76
5 0.157 4000 4
6 0.132 3360 3.36
7 0.111 2830 2.83
8 0.0937 2380 2.38
10 0.0787 2000 2
12 0.0661 1680 1.68
14 0.0555 1410 1.41
16 0.0469 1190 1.19
18 0.0394 1000 1
20 0.0331 841 0.841
25 0.028 707 0.707
30 0.0232 595 0.595
35 0.0197 500 0.5
40 0.0165 400 0.4
45 0.0138 354 0.354
50 0.0117 297 0.297
60 0.0098 250 0.25
70 0.0083 210 0.21
80 0.007 177 0.177
100 0.0059 149 0.149
120 0.0049 125 0.125
140 0.0041 105 0.105
170 0.0035 88 0.088
200 0.0029 74 0.074
230 0.0024 63 0.063
270 0.0021 53 0.053
325 0.0017 44 0.044
400 0.0015 37 0.037
 
Pipe
Size
Outside Diameter Inside Diameter Bolt
Holes
Bolt Hole Diameter Bolt Circle
1/2 3-1/2 0.88 4 5/8 2-3/8
3/4 3-7/8 1.09 4 5/8 2-3/4
1 4-1/4 1.36 4 5/8 3-1/8
1-1/4 4-5/8 1.70 4 5/8 3-1/
1-1/2 5 1.95 4 5/8 3-7/8

2 6 2.44 4 3/4 4-3/4
2-1/2 7 2.94 4 3/4 5-1/2
3 7-1/2 3.57 4 3/4 6
3-1/2 8-1/2 4.07 8 3/4 7
4 9 4.60 8 3/4 7-1/2

5 10 5.66 8 7/8 8-1/2
6 11 6.72 8 7/8 9-1/2
8 13-1/2 8.72 8 7/8 11-3/4
10 16 10.88 12 1 14-1/4
12 19 12.88 12 1 17
Note: All dimensions are in inches.

Flow Tips:
Q) How do I convert from centipoise (cP) to centistokes (cSt)?

A) If you are working with hydrocarbons like fuel or lubricating oil, the conversion is simple. To get centistokes from centipoise, divide by the density. Since most hydrocarbons will have a density of about 0.85 to 0.9, the centistokes value will be about 10% to 15% higher than the centipoises value.

To go in the other direction, multiply centistokes by the density to get centipoises.


Meet the Author
Flow Specialist - Bill Michie Written By: Bill Michie  
Flow Applications Specialist
Cross Company
Instrumentation Group

Phone: (866) 905-9790 (M-F, 8am-5pm Eastern)
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