Pipe network: series + parallel — a TI-84 Plus CE program

By E-Code · updated 2026-09-26

PIPEPAR is a TI-BASIC program for the TI-84 Plus CE. One pipe in series with two in parallel, common friction factor: how the flow splits, velocities, and the parallel and total head loss.

What it asks for and what it shows

It asks for 8 values at its prompts. In the example below it shows QB L/S, QC L/S, VB M/S, VC M/S, H PAR M, H TOT M.

Example run

One of its oracle test cases: “unequal branches”. The inputs are typed in order, and the results are the values the case expects on the screen.

Step	Value
You enter
Input 1	60
Input 2	0.02
Input 3	150
Input 4	200
Input 5	100
Input 6	300
Input 7	80
Input 8	250
The screen shows
`QB L/S=`	36.87611663
`QC L/S=`	23.12388337
`VB M/S=`	4.695212994
`VC M/S=`	4.600350428
`H PAR M=`	67.41597879
`H TOT M=`	83.08447912

How it's checked

2 test cases, each checked against an independent method. Replayed key by key on a virtual TI-84 Plus CE, they make 16 checks.

How E-Code checks every program

Run it or put it on your calculator

Open the library in the TI-84 Plus CE calculator and pick “Pipe network: series + parallel” (PIPEPAR).
Put it on your own calculator with a computer and a USB cable, or type it in by hand.

Related programs

All TI-84 Plus CE engineering programs · All TI-84 Plus CE programs