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preface to fifteenth edition

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2.82 SECTION 2<br />

TABLE 2.13 Viscosity Conversion Table<br />

Centis<strong>to</strong>kes <strong>to</strong> Saybolt, Redwood, and Engler units.<br />

Poise cgs unit of absolute viscosity<br />

Centipoise 0.01 poise<br />

S<strong>to</strong>ke cgs unit of kinematic viscosity Centis<strong>to</strong>ke 0.01 s<strong>to</strong>ke<br />

Centipoises centis<strong>to</strong>kes density (at temperature under consideration)<br />

Reyn (1 lb · s per sq in) 69 10 5 centpoises<br />

Cf. Jour. Inst. Pet. Tech., Vol. 22, p. 21 (1936); Reports of A. S. T. M. Committee D-2, 1936 and 1937.<br />

The values of Saybolt Universal Viscosity at 100F and at 210F are taken directly from the comprehensive<br />

ASTM Viscosity Table, Special Technical Publication No. 43A (1953) by permission of the publishers, American<br />

Society for Testing Materials, 1916 Race St., Philadelphia 3, Pa.<br />

Centis<strong>to</strong>kes<br />

Saybolt Universal Viscosity at<br />

100F. 130F. 210F.<br />

Redwood Seconds at<br />

70F. 140F. 200F.<br />

Engler<br />

Degrees at<br />

all Temps.<br />

2.0 32.62 32.68 32.85 30.2 31.0 31.2 1.14<br />

3.0 36.03 36.10 36.28 32.7 33.5 33.7 1.22<br />

4.0 39.14 39.22 39.41 35.3 36.0 36.3 1.31<br />

5.0 42.35 42.43 42.65 37.9 38.5 38.9 1.40<br />

6.0 45.56 45.65 45.88 40.5 41.0 41.5 1.48<br />

7.0 48.77 48.86 49.11 43.2 43.7 44.2 1.56<br />

8.0 52.09 52.19 52.45 46.0 46.4 46.9 1.65<br />

9.0 55.50 55.61 55.89 48.9 49.1 49.7 1.75<br />

10.0 58.91 59.02 59.32 51.7 52.0 52.6 1.84<br />

11.0 62.43 62.55 62.86 54.8 55.0 55.6 1.93<br />

12.0 66.04 66.17 66.50 57.9 58.1 58.8 2.02<br />

14.0 73.57 73.71 74.09 64.4 64.6 65.3 2.22<br />

16.0 81.30 81.46 81.87 71.0 71.4 72.2 2.43<br />

18.0 89.44 89.61 90.06 77.9 78.5 79.4 2.64<br />

20.0 97.77 97.96 98.45 85.0 85.8 86.9 2.87<br />

22.0 106.4 106.6 107.1 92.4 93.3 94.5 3.10<br />

24.0 115.0 115.2 115.8 99.9 100.9 102.2 3.34<br />

26.0 123.7 123.9 124.5 107.5 108.6 110.0 3.58<br />

28.0 132.5 132.8 133.4 115.3 116.5 118.0 3.82<br />

30.0 141.3 141.6 142.3 123.1 124.4 126.0 4.07<br />

32.0 150.2 150.5 151.2 131.0 132.3 134.1 4.32<br />

34.0 159.2 159.5 160.3 138.9 140.2 142.2 4.57<br />

36.0 168.2 168.5 169.4 146.9 148.2 150.3 4.83<br />

38.0 177.3 177.6 178.5 155.0 156.2 158.3 5.08<br />

40.0 186.3 186.7 187.6 163.0 164.3 166.7 5.34<br />

42.0 195.3 195.7 196.7 171.0 172.3 175.0 5.59<br />

44.0 204.4 204.8 205.9 179.1 180.4 183.3 5.85<br />

46.0 213.7 214.1 215.2 187.1 188.5 191.7 6.11<br />

48.0 222.9 223.3 224.5 195.2 196.6 200.0 6.37<br />

50.0 232.1 232.5 233.8 203.3 204.7 208.3 6.63<br />

60.0 278.3 278.8 280.2 243.5 245.3 250.0 7.90<br />

70.0 324.4 325.0 326.7 283.9 286.0 291.7 9.21<br />

80.0 370.8 371.5 373.4 323.9 326.6 333.4 10.53<br />

90.0 417.1 417.9 420.0 364.4 367.4 375.0 11.84<br />

100.0* 463.5 464.4 466.7 404.9 408.2 416.7 13.16<br />

* At higher values use the same ratio as above for 100 centis<strong>to</strong>kes; e.g., 102 centis<strong>to</strong>kes 102 4.635 Saybolt seconds at<br />

100F.<br />

To obtain the Saybolt Universal viscosity equivalent <strong>to</strong> a kinematic viscosity determined at tF., multiply the equivalent<br />

Saybolt Universal viscosity at 100F. by 1 (t 100) 0.000064; e.g., 10 centis<strong>to</strong>kes at 210F are equivalent <strong>to</strong> 58.91 <br />

1.0070, or 59.32 Saybolt Universal Viscosity at 210F.

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