Pipeline Chlorination Simplified - Disinfection of Pipelines and Storage Facilities Field Guide - page 113

Example 1. Calculate the volume of 25 mg/L solution
needed to chlorinate a 200-ft long section of 2.5-in. diameter
pipeline with 10% sodium hypochlorite.
Use the checklist to ensure all of the information is collected.
❑ The pipeline diameter and length.

2.5-in. diameter and 200 ft long

❑ Valves, hydrants, tees, and other appurtenances.

No valves or hydrants are listed.

❑ Volume of pipeline to be chlorinated.

Using calculator c8-1, volume in gal = 200 ft ×

0.25 gal/ft = 50 gal
This is the volume of chlorinated water for disposal.
Chlorine residual measurement is needed to determine
the amount of dechlorination chemical needed.

❑ Amount of chlorine needed to complete the disinfection

procedure.
Using calculator c8-2, mL 10% sodium hypochlorite =
50 gal 0.94 mL/gal = 47 mL

×

Example 2. Calculate the volume of 25 mg/L solution
needed to chlorinate a 100-m long section of 75-mm diameter
pipeline using 5% sodium hypochlorite.
Use the checklist to ensure all of the information is collected.
❑

The pipeline diameter and length.
75 mm diameter and 100 m long

Valves, hydrants, tees, and other appurtenances.
No valves or hydrants are listed.

❑

Volume of pipeline to be chlorinated.
Using calculator c8-1, volume in L = 100 m

❑

×

4.42 L/m = 442 L

Amount of chlorine needed to complete the disinfection
procedure.
Using calculator c8-2, mL 5% sodium hypochlorite =
442 L

❑

0.503 mL/L = 222 mL

×