Page 92 - Vessel Sanitation Program 2018 Construction Guidelines

VSP 2018 Construction Guidelines

22.13.6 Indicator and Alarm
Install a low-range salinity indicator, operating temperature indicator,
automatic discharge to waste system, and alarm with trip setting on water
production equipment.

22.13.7 High-Saline Discharge
If routed for discharge, direct high-saline discharge from evaporators to the
bilge or overboard through an AIR GAP or RP ASSEMBLY.

22.14 Halogenation
Locate storage areas of salt used to generate chlorine for potable water close to the
chlorine production plant. Construct storage areas to dry food storage standards.

22.14.1 Bunkering and Production

22.14.1.1 Backflow Prevention
Provide POTABLE WATER taps with appropriate BACKFLOW
prevention at the HALOGEN supply tanks.

22.14.1.2 Halogen Injection
Control HALOGEN injection by a flow meter or an analyzer with a
sample point located at least 3 meters (10 feet) downstream of the
HALOGEN injection point. Installed analyzers must have a sample
point to calibrate the analyzer.

A static mixer may be used to reduce the distance between the
HALOGEN injection point and the sample cock or HALOGEN
analyzer sample point. Ensure that the mixer is installed per the
manufacturer’s recommendation. Provide all manufacturers’ literature
for installation, operation, and maintenance.

22.14.1.3 pH Adjustment
Provide automatic PH adjustment equipment for water bunkering and
production. Install analyzer, controller, and dosing pumps that are
designed to accommodate changes in flow rates.

22.14.2 Distribution

22.14.2.1 Sample Point
Provide an analyzer controlled, automatic HALOGENATION system.
Install the analyzer probe sample point at least 3 meters (10 feet)
downstream of the HALOGEN injection point. The analyzer must have
a sample point for calibration.

A static mixer may be used to reduce the distance between the
HALOGEN injection point and the HALOGEN analyzer sample point.
Ensure the static mixer is installed per the manufacturer’s

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