What s new. Experience from 2 x 60K LGC - Intertanko · PDF fileWhat’s new. Experience...
Transcript of What s new. Experience from 2 x 60K LGC - Intertanko · PDF fileWhat’s new. Experience...
What’s new.Experience from 2 x 60K LGC
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Implementation Status
� The IGC Code has not been fundamentally amended since 1983� The revised IGC Code is a SIGTTO led
industry effort� The requirements will apply to ships
having their keel laid on or after 1 July 2016. � The revised IGC Code is not
retroactive.
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Fundamental changes
� The new Code is an evolution of the old Code
� The new Code is more goal-based .
� Allow alternative ways of achieving compliance.
� The new IGC Code still contain prescriptive requirements.
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Chapter 1-General� Replaces the definition of “gas -Dangerous space” with
“Hazardous Area” based on electrical requirements
� Clarifies Category A space. Add IGG/Incinerator.� Re-write the “separate systems”. Less clear than the old.� Introduces the option of using thermal oxidation method� Harmonized survey system is used as the default system
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Chapter 2-Ship Survival capability and Location of Cargo tanks
� Stability instrument for new and existing vessels (retroactive application).� Survival capability is investigated for ballast and cargo heel
condition� Increased separation of cargo tanks
from side shell 800mm to 2000m (function of Vc).(IGC.2.4) � Change in threshold ship length
for type 3G (125m 80m)
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Chapter 3- Ship Arrangements� Alternative arrangements may be accepted after Risk
Assessment � Single door access for the forecastle facing the cargo area is
acceptable � Wheelhouse windows are required to be of A-0 fire class� Cargo machinery spaces shall be treated as cargo pump-rooms
in SOLAS
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Chapter 4- Cargo Containment� Part A - Functional requirements for cargo
containment � Part B - Design loads� Part C - Structural integrity� Part D - Materials and construction (non-metallic
materials in Appendix 4)� Part E - Tank types� Part F - Cargo containment systems of novel
configuration� Part G - Guidance notes
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Chapter 4- Cargo Containment
� The design life of the cargo containment system shall not be less than the design life of the ship. North Atlantic environmental conditions� Builders and owners should develop an in-service
inspection plan for class approval � The critical defect sizes of secondary
barrier shall be defined in orderthe CLASS to approve its effectiveness� Cargo containment systems shall be
designed for the loads imposed by associated structure and equipment (e.g. Spray nozzles) � Consideration of vibration (hull, machinery)� Determination of Insulation based on the boil off rate.
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Chapter 5 – Process pressure vessels and liquids, vapor and pressure piping systems� Risk Assessment for limiting the
exposure of personnel to fire and other hazards � All pipelines or components which may
be isolated in liquid full condition shall be provided with relief valves for thermal expansion (50L).� PRVs in pipelines or components that may be
automatically isolated with trapped liquid due to a fire shall be sized for a fire condition.
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Chapter 5 – Process pressure vessels and liquids, vapor and pressure piping systems
� Cargo liquid and vapour lines shall befitted with filters. � 100% radiographic or ultrasonic
inspection of butt-welded joints for piping systems with design temperatures colder than -10°C, or with inside diameters of more than 75 mm, or wall thicknesses greater than 10 mm;
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Chapter 5 – Process pressure vessels and liquids, vapor and pressure piping systems� For bellows expansion joints used in vapour service, a lower minimum
design pressure may be accepted.IMO� All emergency shutdown valves shall be of the "fire closed" type. IMO� The design and installation of expansion bellows shall be in accordance
with recognized standards. Class Drawing approval for anchoring positions.
� Cargo piping systems shall be provided with a thermal insulation system.
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Layout review based on IGC clause 5.12.3.1
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Dome 1 to 4 Spool Station Aft
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Chapter 5 – Process pressure vessels and liquids, vapor and pressure piping systems
� Cargo piping material SUS 316L� The flow or capacity shall be certified to a recognized
standard for each size and type of valve. OLD IGC was referring ONLY to PRV
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Chapter 7 Cargo pressure / Temperature control
� Reliquefaction of cargo vapours� Leakage detection of toxic or flammable vapours into a
non-hazardous area or overboard
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Chapter 8 - Vent systems for cargo containment
� Requirement for safe means and procedures for emergency isolation of the PRV’s
� Procedures shall be provided and included in the cargo operations manual
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Chapter 9- Cargo containment system atmosphere control � Sufficient number of gas sampling points shall be
provided for each cargo tank and cargo piping shall be provided
� Arrangements to prevent backflow of cargo vapour into the inert gas system. - 2 non-return valves + spool piece.
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Chapter 10 - Electrical installations
� Completely rewritten chapter� An FMEA/ IEC 60812/approved by class for electrical
generation� Electrical depth sounding, log devices and impressed
current protection system anodes or electrodes shall be housed in gastight enclosures .
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Chapter 11 - Fire protection and extinction
� The fire main shall be of the ring type� Water spray coverage� The emergency fire pump shall
have capacity to serve some areas if all spray pumps are located in the engine room
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Chapter 11 - Fire protection and extinction
�Water-spray, redundant supply�Water-spray piping materials and fittings� Initial testing of Dry Chemical.� At least one hand hose line and one monitor should be
tested for each ship
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Chapter 12 - Artificial ventilation in the cargo area�Monitoring of ventilation systems to be provided.
� Minimum number of air changes provided for fixed (8) and portable (16) ventilation equipment for spaces not normally entered. HOLD SPACES
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Chapter 13 - Instrumentation and automation systems� Testing of high level alarms by raising the cargo liquid level
in the cargo tank to the alarm point (High level alarm (95%) only?)� Testing of the level alarm prior loading- lifting of floats
from deck. Pressure vessel type tanks?� Additional Gas sampling point at IGS header� Oxygen deficiency monitoring for carriage Non-Flammable
products in:- Cargo machinery space- Cargo tank hold spaces- Enclosed space containing NITROGEN/IGG
� Continuous type Gas Detection � The crankcases of engines that can run on gas shall be
arranged to alarm before 100% LFL
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Chapter 13 - Instrumentation and automation systems� 13.8 - Completely new section addressing automation systems:� Installation� Suitability of hardware � Software design� Interfaces� Safeguards against incorrect operations� Segregation between monitoring, alarm and safety systems� RISK ASSESMENT TECHNICUES� Management of change process and records of changes� Process for development and maintenance of integrated systems
based on ISO/IEC 15288:2008 Systems and software engineering –System life cycle processes, and ISO 17894:2005 Ships and marine technology – Computer applications
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Integrated Automation System (IAS)
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Chapter 13 - Instrumentation and automation systems
� System integration:� Functions shall be designed to fail-safe. Builders
responsible � Key hazards of the integrated system shall be identified
using appropriate risk-based techniques� The integrated system shall have a suitable means of
reversionary control. NEED for IACS common interpretation.� Failure of one part of the integrated system shall not
affect the functionality of other parts. IEC 60812
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Chapter 14 – Personnel protection� Annual inspection of compressed air equipment by
competent person.� Sets of Safety equipment three instead of two� Removes the option of spare Air bottles.� Decontamination stations at each cargo manifold and
cargo machinery space entrance
� Protective clothing, boots and gloves shall be gas-tight
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Chapter 15 - Filling limits for cargo tanks
� 98% default filling limit.� Increased filling limits are subject to further
discussions within IACS and the IMO� An absolute maximum filling limit of 99.5 % at
reference temperature has been introduced due to the publication of IACS Rec. No.109.
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Other Requirements
� Chapter 16 - Use of cargo as fuel� Completely rewritten chapter with
requirements for all fuel gas systems, gas consumers and spaces containing gas consumers
� Chapter 18 - Operating requirements� An approved cargo operation manual is required� Procedures for routine inspection of hold spaces of type A
cargo tanks only with”heel”� New section with very detailed requirements for ESD
systems. ISO 28460:2010 � A functional flow chart of the ESD system (cause-Effect)
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ESD & Ship-Shore Link System
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Conclusion
� GOAL Based requirements rather than prescriptive. � Material and testing arrangements based on
recognized standards� Risk Assessment approach for Hazards Identification� Safeguards for Automation against Uninteded
operation� A lot of Clarifications needed.
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THANK YOUFOR
YOUR ATTENTION
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