Page 185 - Pipeline Pigging Technology

Pipeline Pigging Technology

SOLVENT TESTING
* (hr) (F) Disinte- %
TEST # SOLVENT Time TEMP. gration SOLUBLE
1 2% M002, 1% MOOS, 16 80 Good 100
1% M009, & 2% F057
2 2% M002, 1% MOOS, 8 80 Good 100
1% M009, & 2% F057
3 2% M002, 1% MOOS, 6 80 Good 100
1% M009, & 2% F057
4 2% M002, 1% MOOS, 4 80 Fair 90
1% M009, & 2% F057

Tablel. Analysis of pipe samples. Note that M002, MOOS, M009 and
F057 are DS codes. The solvent mixture is a proprietary blend of
alkaline chemicals for the removal of oil, grease and other organic
materials.

Conventional means of cleaning the new 16-in pipeline would be relied
upon to assure its cleanliness (i.e. mechanical pigs and water from the
hydrotest). This would eliminate any chance of hydrocarbons or excessive
debris being carried into the new 16-in pipeline from the existing 12-in lines,
since the exact composition or quantities of material along the entire length
of the existing pipeline could not be confirmed, prior to the gellypig service.
The short 2.4 mile (spur) section of 12-in pipeline at the W.Alton meter
station would be cleaned by the gellypig train in Phase 1, since the pig train
would originate in this section. The section of pipeline from WjUton to the
east side of the Mississippi River would not be addressed at this time. A third
phase (gellypig train), to clean the 11.6 miles of new 16-in pipeline, was not
considered, primarily due to its feasibility.

DESIGN

In order to accomplish the objectives outlined above, a sample section of
the pipe was removed and sent to the DS Industrial Division Laboratory in
Houston. A complete analysis would provide the basis for the optimum job
design. From the sample, the amount of debris in the pipeline could be
estimated. Also, the most effective solvent for removal of the residual crude
oil could be determined. From this lab. analysis, a complex gellypig cleaning
train was designed.

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