Tank cleaning and slop disposal for noxious liquid substances on chemical tankers
All processing and discharging of slops on tankers which are carrying a cargo of noxious liquid
substances in bulk is to be in strict compliance with the requirements of Annex II of MARPOL 73/78
and procedures described in the approved ship specific Procedure and Arrangements Manual (P & A
Manual). The above regulations (the latest amended version) must be available on board, and
consulted before the loading of any noxious cargo is considered.
Consideration must always be given to coating compatibility and for the stowage of Slop of incompatible cargoes. The retention of viscous and vegetable oil Slops in zinc coated tanks must be avoided.
Consideration must always be given to coating compatibility and for the stowage of Slop of incompatible cargoes. The retention of viscous and vegetable oil Slops in zinc coated tanks must be avoided.
All operations with respect to a Noxious liquid substance which take place on board the vessel,
including discharge into the sea or removal by ventilation of residues, is to be properly recorded in
the Cargo Record Book for Ships Carrying NLS in Bulk.
Substances posing harm to the environment are categorised by MARPOL 73/78 Annex II into four Categories – X, Y, Z and OS. Category X substances are those posing the greatest threat to the Marine Environment, whilst Category Z substances are those posing the smallest threat. Water contaminated with chemical cargo (e.g. tank washings) may be required to be discharged ashore, into barges and, under certain circumstances, into the sea always in compliance with Marpol Annex II.
When washing tanks, which contained incompatible cargoes, each tank to be washed separately and the washings pumped independently to the shore, barge or sea as per Marpol Annex II. Do not collect incompatible cargo slops into same tank. Always take coating compatibility into account.
If tank washing or slops are to be transferred to a barge alongside the Ship to Ship Transfer Guide is to be followed, and it must be ensured that the necessary hose connections are properly made. Barge personnel must be acquainted with the nature of the hazards and with the safety precautions, which must be observed in the interest of both parties.
Under no circumstances must water with noxious cargo be discharged overboard into port or enclosed waters, without the express permission of the appropriate authority. At sea, tank washings must only be discharged overboard when absolutely necessary, and in strict compliance with Annex II of MARPOL 73/78 and ship’s P&A Manual.
When chemical tankers are carrying a cargo or part cargo of oil in bulk they must Marpol Annex I regulations for discharge of Annex I cargo slops.
Following reference publications provide useful guidance and international regulations for carrying hazardous chemicals at sea.
Related Info:
PV valves operation, maintenance& safety precautions
Ship to ship transfer guideline using VEC systems
Cargo unloading operation safety precautions
Liaison between ship and shore
Preparation for cargo operation
Preparing a cargo tank atmosphere
Controlling the atmosphere in cargo tanks with nitrogen supplied from shore
Ship shore safety checklist while alongside a terminal
Cargo handling safe practice for chemical products
Cargo compatibility and reactivity of various chemical cargo
Poisoning and required first aid treatment onboard
Determining presence of contaminants in chemical cargo
Checklist for handling dangerous liquid chemicals in bulk
Ship shore safety checklist while alongside a terminal
Isolation of cargo tanks and piping systems
Ship shore cargo connection safe method
Venting of cargo tanks safety procedure
Ship to ship transfer operation
Controlling the atmosphere in cargo tanks with nitrogen supplied from shore
Effects of Tugs and other craft alongside chemical tankers
Primary means of cargo connection between ship and shore
Means of access (gangways or accommodation ladders) safety precautions
Ship/Shore Safety Checklist
How to prepare a cargo loading / discharge plan ?
Technical readiness prior loading operations
Voyage planning and related considerations
Cargo sampling safety precautions
Cargo calculation
Signing a bill of lading and related guideline
Preparation for cargo operation
Preparing a cargo tank atmosphere
Cargo unloading operation safety precautions
Liaison between ship and shore
How to prevent cargo pipeline leakage
Ship shore safety checklist while alongside a terminal
Reference publications
Other Info:
Voyage planning and related considerations
Preparation for cargo operation
Preparing a cargo tank atmosphere
Cargo unloading operation safety precautions
Liaison between ship and shore
Cargo line leakage countermeasures
Checklist for handling dangerous liquid chemicals in bulk
Recommended temperature monitoring equipments onboard
Practical example of solving tank cleaning problems
Pre-cleaning /washing of cargo tanks
Risk & hazards of chemical contamination onboard
Cargo compatibility and reactivity of various chemical cargo
Poisoning and required first aid treatment onboard
Chemical tanker safe mooring practice
Determining presence of contaminants in chemical cargo
How to avoid solidification in cargo tanks ?
Cargo segregation requirement for chemical tankers
How to arrange disposal of tank cleaning waste ?
Restrictions on discharge cargo residue into sea
Retention of slops on chemical tankers
Vapour emission control requirement for chemical tankers
Handling self reactive chemicals
Handling of toxic chemical cargoes
Pre-loading meeting safety consideration
How to determine chemical cargo temperatures at different level ?
How to take cargo samples ?
How to avoid solidification in cargo tanks ?
Cargo line clearance requirement for chemical tankers
How to arrange disposal of tank cleaning waste ?
Care of cargo pums - risk of pump overload or underload
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.
Substances posing harm to the environment are categorised by MARPOL 73/78 Annex II into four Categories – X, Y, Z and OS. Category X substances are those posing the greatest threat to the Marine Environment, whilst Category Z substances are those posing the smallest threat. Water contaminated with chemical cargo (e.g. tank washings) may be required to be discharged ashore, into barges and, under certain circumstances, into the sea always in compliance with Marpol Annex II.
When washing tanks, which contained incompatible cargoes, each tank to be washed separately and the washings pumped independently to the shore, barge or sea as per Marpol Annex II. Do not collect incompatible cargo slops into same tank. Always take coating compatibility into account.
If tank washing or slops are to be transferred to a barge alongside the Ship to Ship Transfer Guide is to be followed, and it must be ensured that the necessary hose connections are properly made. Barge personnel must be acquainted with the nature of the hazards and with the safety precautions, which must be observed in the interest of both parties.
Under no circumstances must water with noxious cargo be discharged overboard into port or enclosed waters, without the express permission of the appropriate authority. At sea, tank washings must only be discharged overboard when absolutely necessary, and in strict compliance with Annex II of MARPOL 73/78 and ship’s P&A Manual.
When chemical tankers are carrying a cargo or part cargo of oil in bulk they must Marpol Annex I regulations for discharge of Annex I cargo slops.
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
Related Info:
PV valves operation, maintenance& safety precautions
Ship to ship transfer guideline using VEC systems
Cargo unloading operation safety precautions
Liaison between ship and shore
Preparation for cargo operation
Preparing a cargo tank atmosphere
Controlling the atmosphere in cargo tanks with nitrogen supplied from shore
Ship shore safety checklist while alongside a terminal
Cargo handling safe practice for chemical products
Cargo compatibility and reactivity of various chemical cargo
Poisoning and required first aid treatment onboard
Determining presence of contaminants in chemical cargo
Checklist for handling dangerous liquid chemicals in bulk
Ship shore safety checklist while alongside a terminal
Isolation of cargo tanks and piping systems
Ship shore cargo connection safe method
Venting of cargo tanks safety procedure
Ship to ship transfer operation
Controlling the atmosphere in cargo tanks with nitrogen supplied from shore
Effects of Tugs and other craft alongside chemical tankers
Primary means of cargo connection between ship and shore
Means of access (gangways or accommodation ladders) safety precautions
Ship/Shore Safety Checklist
How to prepare a cargo loading / discharge plan ?
Technical readiness prior loading operations
Voyage planning and related considerations
Cargo sampling safety precautions
Cargo calculation
Signing a bill of lading and related guideline
Preparation for cargo operation
Preparing a cargo tank atmosphere
Cargo unloading operation safety precautions
Liaison between ship and shore
How to prevent cargo pipeline leakage
Ship shore safety checklist while alongside a terminal
Reference publications
- IBC Code / BCH code
- International Safety Guide for Oil Tankers and Terminals (ISGOTT)
- ICS Chemical Tanker Safety Guide
- Ship’s “Procedure and Arrangements Manual” (Approved by Class)
- Certificate of Fitness for the Carriage of Dangerous Chemicals in Bulk
- Ship’s “VEC System Operational Manual” (Approved by Class)
- Ship to Ship Transfer Guide (Petroleum)
- Tank Cleaning Manual
Other Info:
Voyage planning and related considerations
Preparation for cargo operation
Preparing a cargo tank atmosphere
Cargo unloading operation safety precautions
Liaison between ship and shore
Cargo line leakage countermeasures
Checklist for handling dangerous liquid chemicals in bulk
Recommended temperature monitoring equipments onboard
Practical example of solving tank cleaning problems
Pre-cleaning /washing of cargo tanks
Risk & hazards of chemical contamination onboard
Cargo compatibility and reactivity of various chemical cargo
Poisoning and required first aid treatment onboard
Chemical tanker safe mooring practice
Determining presence of contaminants in chemical cargo
How to avoid solidification in cargo tanks ?
Cargo segregation requirement for chemical tankers
How to arrange disposal of tank cleaning waste ?
Restrictions on discharge cargo residue into sea
Retention of slops on chemical tankers
Vapour emission control requirement for chemical tankers
Handling self reactive chemicals
Handling of toxic chemical cargoes
Pre-loading meeting safety consideration
How to determine chemical cargo temperatures at different level ?
How to take cargo samples ?
How to avoid solidification in cargo tanks ?
Cargo line clearance requirement for chemical tankers
How to arrange disposal of tank cleaning waste ?
Care of cargo pums - risk of pump overload or underload
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.