Page 113 - Pipeline Rules of Thumb Handbook

100 Pipeline Rules of Thumb Handbook

All results, as well as the input, are printed out, so the tape 21 M/S—m per sec
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becomes a permanent record. 22 FT /MI—cuft per mi
A good feature of the program is that, for a given size 23 KG/M—kg per m
pipe (after executing PWCV and A, content routine, to
store data concerning that particular size pipe), velocity
routine, B, can be run as often as wanted. Press B, then LABEL PWCV Calls up program
key in desired flowrate after the prompt, then press the RUN LABEL A Calls content calculations
key. LABEL B Calls for feed rate and velocity
When a different size pipe is needed: XEQ PWCV, press calculations
A, then B, as often as needed for different flowrates.
Basic data calculated by this program can be used for deter-
mining the following criteria: Note. A and B are XEQ in user mode.
Numeric labels 01 to 06 are used in the program to
provide necessary GTO directions. They are not stand-alone
• Weight: Cost of construction, hauling and stringing, routines.
investments.
• Content: Amount of water for hydrostatic test, line User directions. Size 25. Set user mode. Input program.
fill, oil stocks. Amount of one grade to be displaced for
If it is desired to use units as prompted, key in value and run
another to reach a station, shut-off valve, or terminal. key. If metric units are wanted, key in 0 for English units then
When a segment must be drained, barrels or gallons to run key.
be removed.
• Velocity: Time for interface or scraper to traverse Example. Display: Pipe OD in.? Key in 0, press run key,
distance between two points. Time to accumulate or see pipe OD MM? Key in value and run key. See pipe T MM?
withdraw a given quantity of fluid. Locating head After weights are calculated: If content is wanted, XEQ
of column of a grade of oil or a scraper from given “A.” Calculations can be terminated at this point.
station after a certain time. Determining expected When velocities are desired, XEQ “B” input feed rate in
time of arrival (ETA) of interface or scraper at a given desired units. Label “B” can be run for several feed rates as
point.
often as desired for the given size pipe. If other pipe sizes are
needed, XEQ PWCV and “A,” then run “B” as many times as
needed for different feed rates.
List of registers and legend
Note. If feed rates other than BBL/HR are to be input,
Register Content first key in 0 and run. This causes display to move up. See
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00 Not used GPM? No. Gallons? Key in 0 and run key. See FT /MIN?
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01 Pipe OD in. Continue to M /HR? If you have this figure, key it in and run.
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02 Pipe OD mm Now suppose you have M /DAY. This does not agree with
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03 Pipe T in. prompt; enter M /DAY, divide by 24, then press run key. This
04 Pipe T mm routine can be used for BBL/DAY, GAL/HR (divided by 60),
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05 Pipe ID in. FT /DAY (divide by 24), etc.
06 Pipe ID mm
07 LBM/FT—lb(mass)/ft Note. When results such as OD, ID, T Values, Weight
08 ST/MI—short tons/mi KG/M are compared with printed values in API STD 5L,
09 MT/KM—metric tons/km small discrepancies are sometimes found, usually on the order
10 BBL/MI—bbl(42 U.S. gal) per mi of 0.1% or less. This is evidently due to truncation differences
11 GAL/100FT—gal (U.S.) per 100ft in making conversions.
12 L/M—liters per m
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13 M /KM—cum per km
14 BBL/HR—bbl (42 U.S. gal) per hr
15 GPM—gal (U.S.) per minute Formulas
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16 FT /MIN—cuft per min
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17 M /HR—cum per hr Pipe weight LBM/FT (plain end) is calculated by formula
18 MI/HR—mi (statute) per hr used by API:
19 KM/HR—km per hr
.
20 FT/S—ft per sec LBM FT = 10 68 ( D T T )
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