Chemical Tankers / Day 2 / Day 2 Topic 3 Chemical Tanker Regs
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3.5 Definitions
Chapter 9 – Environmental control
Padding: by filling the cargo tank and associated piping systems with a liquid, gas or vapor which separates the cargo from the air, and maintaining that condition.
3.5 Definitions
Chapter 9 – Environmental control
Drying: by filling the cargo tank and associated piping systems with moisture-free gas or vapor with dew point of –40C or below at atmospheric pressure, and maintaining that condition.
Ventilation: forced or natural.
3.5 Definitions
Chapter 13 – Instrumentation
Ships carrying toxic or flammable products or both shall be equipped with at least 2 instruments designed and calibrated for testing for the specific vapors in question. If such instruments are not capable to testing for both toxic concentrations and flammable concentration, then 2 separate portable instruments shall be provided.
3.5 Definitions
Chapter 13 – Instrumentation
When toxic-vapor-detection equipment is not available for some products which require such detection, as indicated in Chapter 17, column k, the Administration may exempt the ship from the requirement, provided an appropriate entry is made on the COF.
3.5 Definitions
Chapter 13 – Instrumentation
When granting such an exemption, the Administration shall recognize the necessity for additional breathing-air supply and an entry shall be made on the COF drawing attention to the provisions of safety equipment and entry into cargo tanks.
Typical exemption from Administration for carriage of cargo PMDI.
3.5 Special requirements
Chapter 15 – Special requirements
This chapter contains a special requirements for carriage of following cargoes: ammonium nitrate solution, diethyl ether, propylene oxide, acids, all toxic products all isomers and cargoes protected by additives.
3.5 Special requirements
Chapter 15 – Special requirements
Certain cargoes with a reference in column “o” in the table of Chapter 17, by the nature of their chemical make-up, tend, under certain conditions of temperature, exposure to air or contact with a catalyst, to undergo polymerization, decomposition, oxidation or other chemical changes.
3.5 Special requirements
Chapter 15 – Special requirements
Mitigation of this tendency is carried out by introducing small amounts of chemical additives into the liquid cargo or controlling the cargo tank environment.
3.5 Special requirements
Chapter 15 – Special requirements
Ships carrying these cargoes shall be so designed as to eliminate from the cargo tanks and cargo handling system any material of construction or contaminants which could act as a catalyst or destroy inhibitor.