what s new. experience from 2 x 60k lgc - intertanko · pdf filewhat’s new. experience...

What’s new.Experience from 2 x 60K LGC

27 May 2016 Kostas Vlachos 1

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.


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.


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


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)


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


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


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.


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.


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;


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.


Layout review based on IGC clause 5.12.3.1


Dome 1 to 4 Spool Station Aft


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


Chapter 7 Cargo pressure / Temperature control

� Reliquefaction of cargo vapours� Leakage detection of toxic or flammable vapours into a

non-hazardous area or overboard


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


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.


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 .


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


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


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


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


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


Integrated Automation System (IAS)


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


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


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.


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)


ESD & Ship-Shore Link System


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.


THANK YOUFOR

YOUR ATTENTION


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