Page 201 - Pipeline Rules of Thumb Handbook

188 Pipeline Rules of Thumb Handbook

Note: Results—RECAP of any run (which is in storage) can
be reprinted as often as desired by XEQ “DATA.”
If NEG BUOY is 0 and flag 01 is not set, then the program
causes WT to approach WMD and calculates for this
situation.
If a printer is not available, results can be obtained as
follows:

1. XEQ 05, put in data and R/S after each item.
2. When beep sounds, RCL registers one by one in order
given above (so as to identify values).

Figure 3 illustrates the changing of two input values:
namely the pipe diameter and weight. XEQ 05, this rou-
tine calls up the contents of the input registers one at a time
and questions them. Always put in a new T value. Then
R/S.
Figure 3. Changing of two input valves.
When D = ? comes up, key in new value and R/S. Same
with pipe WT = ?. Assume other data remain unchanged, R/S
each time. (Any one value or any combination of values may
be changed before rerunning the program.)
Figure 4 determines if a given pipe, 14in. at 36.71lb/lf
and 1 /2 in. of protective weight coating density of 135lb/
cuft will float. T, DC, T INCR and NEG BUOY are all
zero. DM becomes the density of water 62.4. Set flag 01
and XEQ 05. Key in data and R/S. When all data are in
place only one computation is allowed, then printed out.
WT-WMD tells us the upward forces exceed the downward
forces by 19.1733lb/lf, also the specific gravity is 0.7517 so the
pipe floats. Also note BULK DEN is less than density of Figure 4. Result of calculations to determine whether the pipe
water. will float.

NAPCA specifications*

* NOTE: These are not all the specifications approved by NAPCA. For other specifications consult a NAPCA member.