N6264920Q0010_PWS_Attachment_(1)_MIL-STD-3400-1_Attachment(1).pdf

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B

C

D

E

F

NOTE:

C.

MIL-S'rtJ-3004-1

TABLE XXV. Minimum requirements for the preparation of barge cargo tanks -Continued [, 2

All cargo and vent lines shall be drained of previous product and flushed with cold water. Cargo tanks shall be thoroughly machine washed using cold water.

Tanks shall be gas freed.

The same as Type B., except that hot water shall be used instead of cold water. lftank interiors are coated, water temperature should not exceed 58°C ( 136°F).

The same as for Type C above. In addition, tanks and lines shall be flushed with product to be loaded and examined to confirm meeting product specification.

Process shall be re eated as necessa until assin results are obtained.

Cargo tanks and systems shall be cleaned in such a manner to remove all rust, scale, sediment, and all traces of previous cargo and water.

Contamination of aviation kerosene with FAME: current specifications permit up to 50 ppm by mass FAME in aviation kerosene. lntermediate cargoes and strict washing regime is therefore recommended when loading aviation kerosene cargoes following cargeos containing FAME. Special note

Specifications for sensitive grades will require extreme care during sampling to avoid contamination from previous cargoes or buildup of residues. To reduce the possibility of drawing unrepresentative samples, cleaning of sampling equipment, vapor locks, stand pipes and stilling wells is recommended as part of cleaning when tanks have previously held cargoes containing FAME.

Aviation Gasoline-

- To avoid contamination from FAME, it is recommended to have three intermediate cargoes with NO FAME between aviation gasoline and any cargo with B 100 or any cargo with FAME content greater than 15 vol% B 15.

- Cargoes with a FAME content of 5 volume % or less (BS or below), require a hot water wash, including flushing of the pumps and lines followed by draining is recommended as a minimum for aviation gasoline cargoes.

- Cargoes with FAME content of 15 vol% (B 15) or less, but above BS, require a hot water wash, including flushing of pumps and lines, followed by draining is recommended as a minimum. Tanks must be in good condition and washing needs to particularly stringent. A single intermediate cargo with no FAME content is suggested as an alternative, followed by a hot water wash, including flushing of pumps and line�. and by draining for aviation gasolinecargos.

Aviation Kerosene-

- Due to strict limitations on biological contamination (FAME content maximum 50 ppm by mass) three intermediate cargoes are required with no FAME between FAME (B 100) or any cargo with FAME content greater than 15 vol% (B 15) and a subsequent aviation kerosene cargo.

When following cargoes with a FAME content of 5 vol % or less (BS or below) a hot water wash, including flushing of the pumps and lines followed by draining is recommended as a minimum for aviation kerosene cargoes.

- Cargoes with FAME content of 15 vol% (B 15) or less, but above BS, a hot water wash, including flushing of pumps and lines, followed by draining is recommended as a minimum. Tanks shall be in good condition and washing needs to particularly stringent. A single intermediate cargo with no FAME content is suggested as an alternative, followed by a hot water wash, including flushing of pumps and lines, and by draining for aviation gasoline cargos.

This is per El (Energy Institute) HM 50.

l. In all cases, cargo tanks must be free of water, loose rust, sludge, mud, silt, ballast residue, etc.

2. This table is included as a guide only. Contact DLA Energy Quality Operations Division for tank cleaning requirements for any product not listed in Table XXV.

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