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Current as of October 02, 2022 | Updated by FindLaw Staff
(a) Refrigerated and semirefrigerated tanks shall be filled so that there is an outage of at least 2 percent of the volume of the tank at the temperature corresponding to the vapor pressure of the cargo at the safety relief valve setting. A reduction in the required outage may be permitted by the Commandant when warranted by special design considerations. Normally then, the maximum volume to which a tank may be loaded is:
VL= 0.98dr V/dL
where:
VL=maximum volume to which tank may be loaded.
V=volume of tank.
dr=density of cargo at the temperature required for a cargo vapor pressure equal to the relief valve setting.
dL=density of cargo at the loading temperature and pressure.
(b) Nonrefrigerated tanks shall be filled so that their filling densities shall not exceed the ratios indicated in Table 38.15–1(b).
(c) The “filling density” is defined as the percent ratio of the weight of the gas in a tank to the weight of water the tank will hold at 60° F.
TABLE 38.15-1(b)–MAXIMUM PERMISSIBLE FILLING DENSITIES FOR TANKS OPERATING AT OR NEAR AMBIENT TEMPERATURE | |||
---|---|---|---|
Maximum permitted filling density | |||
Specific gravity at 60° F. | Unlagged tanks–water capacity | Lagged tanks–all capacities | |
1,200 gal. and under | Over 1,200 gal. | ||
0.473-0.480 | 38 | 41 | 42 |
0.481-0.488 | 39 | 42 | 43 |
0.489-0.495 | 40 | 43 | 44 |
0.496-0.503 | 41 | 44 | 45 |
0.504-0.510 | 42 | 45 | 46 |
0.511-0.519 | 43 | 46 | 47 |
0.520-0.527 | 44 | 47 | 48 |
0.528-0.536 | 45 | 48 | 49 |
0.537-0.544 | 46 | 49 | 50 |
0.545-0.552 | 47 | 50 | 51 |
0.553-0.560 | 48 | 51 | 52 |
0.561-0.568 | 49 | 52 | 53 |
0.569-0.576 | 50 | 53 | 54 |
0.577-0.584 | 51 | 54 | 55 |
0.585-0.592 | 52 | 55 | 56 |
0.593-0.600 | 53 | 56 | 57 |
0.601-0.608 | 54 | 57 | 58 |
0.609-0.617 | 55 | 58 | 59 |
0.618-0.626 | 56 | 59 | 60 |
0.627-0.634 | 57 | 60 | 61 |
NOTE: Increase in filling densities to provide for seasonal changes may be considered by the Commandant upon presentation of factual evidence that safe operation can be effected. |
Cite this article: FindLaw.com - Code of Federal Regulations Title 46. Shipping § 46.38.15–1 Filling of tanks—TB/ALL - last updated October 02, 2022 | https://codes.findlaw.com/cfr/title-46-shipping/cfr-sect-46-38-15-1/
FindLaw Codes may not reflect the most recent version of the law in your jurisdiction. Please verify the status of the code you are researching with the state legislature or via Westlaw before relying on it for your legal needs.
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