Calculators - Disinfection of Pipelines and Storage Facilities Field Guide - page 122

Appendix A

Calculators

Below are all of the calculators presented in this field guide.
They are summarized here for convenience. The detailed deriva-
tion of the formulas is shown as well as the calculator as it
appears in the body of the field guide. Note that the calculators
in the field guide are stripped of the details and only show a
single constant that may be the combination of several. Refer to
the chapters and pages indicated for detailed instructions and
examples.

Pipeline Continuous-Feed Method Calculator
To calculate the chlorine feed rate to achieve 25 mg/L inside a
pipeline (does not account for chlorine demand).

gal/min × 25 mg/L × 3.785 L/gal × g/1,000 mg × lb/454 g ×

60 min/hr 24 hr/day = lb/day

×

(c3-1)

Liquid chlorine
feed rate (lb/day)

Water fill rate
(gpm) total

=

0.3

×

L/sec 25 mg/L g/1,000 mg 60 sec/min 60 min/hr = g/hr

× × × ×

(c3-2)

Liquid chlorine
feed rate (g/hr)

Water fill rate
(L/sec) total

=

90

×

123