Safety equipment and related considerations for modern chemical tankers
Ventilation requirement in cargo handling spaces - Chemical tanker procedure :
Spaces normally entered during cargo-handling
operations - Cargo pump-rooms and other closed spaces which contain cargo-handling
equipment and similar spaces in which work is performed on the cargo should
be fitted with mechanical ventilation systems which should be capable of being
controlled from outside such spaces. Provision should be made to ventilate
such spaces prior to entering the compartment and operating the equipment
Mechanical ventilation systems
(i) Mechanical ventilation inlets and outlets should be arranged to ensure sufficient air movement through this space to avoid the accumulation of toxic and/or flammable vapours (taking into account their vapour densities) and to ensure sufficient oxygen to provide a safe working environment, but in no case should the ventilation system have a capacity of less than 30 changes of air per hour, based upon the total volume of the space.
(ii) Ventilation systems should be permanent and should normally be of the extraction type. Extraction from above and below the floor plates should be possible. In rooms housing motors driving cargo pumps, the ventilation should be of the positive-pressure type.
(iii) Ventilation exhaust ducts from gas-dangerous spaces should discharge upwards in locations at least 10 m in the horizontal direction from ventilation intakes and openings to accommodation, service and controlstation spaces and other gas-safe spaces,
(iv) Ventilation intakes should be so arranged as to minimize the possibility of recycling hazardous vapours from any ventilation discharge opening.
(v) Ventilation ducts should not be led through engine-rooms, accommodation, working spaces or other similar spaces.
(vi) Ventilation fans should be approved by the Administration for operation in explosive atmospheres when flammable cargoes are carried aboard the ship.
Spaces not normally entered
Double bottom; cofferdams, duct keels, pipe tunnels, spaces containing cargo tanks and other spaces where cargo may accumulate should be capable of being ventilated to ensure sufficient air to avoid the accumulation of toxic and/ or flammable vapours and to ensure sufficient oxygen to provide a safe environment prior to entry. Where a permanent ventilation system is not provided for such spaces, approved portable means of mechanical ventilation should be provided.
It should also be borne in mind that in all cases the advice given may be subject to local or national regulations, and that terminal operators have their own safety procedures which could affect cargo handling operations and the measures to be adopted in emergencies. The master and all personnel must be aware of and comply with those regulations and procedures. Their existence will be highlighted by the use of the Ship/Shore Safety Checklist which, together with its guidelines for completion, remains a fundamental part of establishing safe conditions for transport by sea of chemicals in bulk.
Related Info pages
Various chemical cargo handling equipments onboard
Checklist for handling dangerous liquid chemicals in bulk
How to determine the level of a liquid in a chemical tank
Following detail pages explain all liquid chemical hazards & precautionary measures while carrying at sea.
Following reference publications provide useful guidance and international regulations for carrying hazardous chemicals at sea.
Main Info pages!
Home page ||| Chemical hazards ||| Cargo planning & Stowage ||| Cargo loading ||| Cargo documents ||| Safe stability ||| Cargo care ||| Preparation for unloading ||| Inert gas systems |||Gas freeing ||| Nitrogen handling ||| Chemical handling Safe practice |||Handling equipments ||| Cargo & Ballast pumps ||| Cargo tanks |||Tank cleaning |||Special cargoes |||Spills emergencies |||Fire protection
Chemicaltankerguide.com is merely an informational site about various aspects of chemical tankers and safety tips that may be particular value to those working in: Chemical Handling, Chemical Storage, Liquefied Chemical Suppliers, Chemical Shipping, Chemical Transportation, Chemical Terminals, Bulk Chemical Services and Chemical Processing. If you are interested in finding out more about chemical tanker guideline please visit IMO official website. For any comment please Contact us
Copyright © 2011 Chemical Tanker Guide.com All rights reserved.
(i) Mechanical ventilation inlets and outlets should be arranged to ensure sufficient air movement through this space to avoid the accumulation of toxic and/or flammable vapours (taking into account their vapour densities) and to ensure sufficient oxygen to provide a safe working environment, but in no case should the ventilation system have a capacity of less than 30 changes of air per hour, based upon the total volume of the space.
(ii) Ventilation systems should be permanent and should normally be of the extraction type. Extraction from above and below the floor plates should be possible. In rooms housing motors driving cargo pumps, the ventilation should be of the positive-pressure type.
(iii) Ventilation exhaust ducts from gas-dangerous spaces should discharge upwards in locations at least 10 m in the horizontal direction from ventilation intakes and openings to accommodation, service and controlstation spaces and other gas-safe spaces,
(iv) Ventilation intakes should be so arranged as to minimize the possibility of recycling hazardous vapours from any ventilation discharge opening.
(v) Ventilation ducts should not be led through engine-rooms, accommodation, working spaces or other similar spaces.
(vi) Ventilation fans should be approved by the Administration for operation in explosive atmospheres when flammable cargoes are carried aboard the ship.
Spaces not normally entered
Double bottom; cofferdams, duct keels, pipe tunnels, spaces containing cargo tanks and other spaces where cargo may accumulate should be capable of being ventilated to ensure sufficient air to avoid the accumulation of toxic and/ or flammable vapours and to ensure sufficient oxygen to provide a safe environment prior to entry. Where a permanent ventilation system is not provided for such spaces, approved portable means of mechanical ventilation should be provided.
It should also be borne in mind that in all cases the advice given may be subject to local or national regulations, and that terminal operators have their own safety procedures which could affect cargo handling operations and the measures to be adopted in emergencies. The master and all personnel must be aware of and comply with those regulations and procedures. Their existence will be highlighted by the use of the Ship/Shore Safety Checklist which, together with its guidelines for completion, remains a fundamental part of establishing safe conditions for transport by sea of chemicals in bulk.
Related Info pages
Various chemical cargo handling equipments onboard
Checklist for handling dangerous liquid chemicals in bulk
How to determine the level of a liquid in a chemical tank
Following detail pages explain all liquid chemical hazards & precautionary measures while carrying at sea.
- Toxicology and associated hazards onboard chemical tankers
- Hazards of vapour given off by a flammable liquid while carrying at sea
- Reactivity of various noxious liquid chemicals
- Most corrosive chemicals carried onboard chemical tankers
- Posoning hazards & first aid treatment
- What is putrefaction process of liquid chemicals ?
- Specific gravity,Vapour pressure and boiling point,Electrostatic charging & measuring Viscosity
- General precautions onboard chemical tankers
- Mooring precautions onboard chemical tankers
- Berth precautions onboard chemical tankers
- Cold weather countermeasures, avoiding electric storms
- Restriction on using radio equipments and other mobile devices in cargo working areas
- Handling precautions for carcinogens or cyanide-like substances
- Handling precautions for Benzene & Methanol
- Securing cargo tank lids and required safety precautions
- Means of access (gangways or accommodation ladders) safety precautions
- Preparations for hot work and safety precautions
- Safe method of gas freeing after a tank cleaning onboard chemical tankers
- Precautions against static electricity
- Handling precautions for nitrogen from shore station
- Cargo tank entry safety precautions
- Ship to ship transfer safety precautions
- How to deal with chemical fire onboard ?
Following reference publications provide useful guidance and international regulations for carrying hazardous chemicals at sea.
- SOLAS (latest consolidated edition)
- MARPOL – 73/78 (latest consolidated edition)
- BCH / IBC Code
- International Safety Guide for Oil Tankers and Terminals (ISGOTT)
- Tanker Safety Guide (Chemicals)
- Ship to Ship Transfer Guide (Petroleum)
- Safety in Oil Tankers
- Safety in Chemical Tankers
- IMDG Code
- Supplement to IMDG Code (Including MFAG and Ems)
- SOPEP
- Clean Seas Guide for Oil Tankers
- FOSFA (for Oils, Seeds and Fats)
- Prevention of Oil Spillage through Cargo Pumproom Sea Valves
- CHRIS Guide (USCG)
- Chemical Data Guide for Bulk Shipment by Water (Condensed Chris)
- MSDS for particular cargo carried
- Chemical Tank Cleaning Guide
Main Info pages!
Home page ||| Chemical hazards ||| Cargo planning & Stowage ||| Cargo loading ||| Cargo documents ||| Safe stability ||| Cargo care ||| Preparation for unloading ||| Inert gas systems |||Gas freeing ||| Nitrogen handling ||| Chemical handling Safe practice |||Handling equipments ||| Cargo & Ballast pumps ||| Cargo tanks |||Tank cleaning |||Special cargoes |||Spills emergencies |||Fire protection
Chemicaltankerguide.com is merely an informational site about various aspects of chemical tankers and safety tips that may be particular value to those working in: Chemical Handling, Chemical Storage, Liquefied Chemical Suppliers, Chemical Shipping, Chemical Transportation, Chemical Terminals, Bulk Chemical Services and Chemical Processing. If you are interested in finding out more about chemical tanker guideline please visit IMO official website. For any comment please Contact us
Copyright © 2011 Chemical Tanker Guide.com All rights reserved.