Amendments to the IGC and IGF Codes

to Approving Alternative Metallic

Material for Cryogenic Service

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Presented by Neo

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CONTENTS

1 Background

2 Problem Analysis

3 Proposal & Conclusion

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CONTENTS

1 Background

2 Problem Analysis

3 Proposal & Conclusion

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CONTENTS

1 Background

2 Problem Analysis

3 Proposal & Conclusion

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Background

•Strategic Directions

• IMO Rule

•Experiments and requirements

•Characteristics of existing three types of steel

Ensure organizational effectivenessStrategic Directions 6

Unified interpretation of provisions of IMO safety,

security, and environment-related conventionsOutput Number 6.1

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Background

Maritime Safety

Committee

Sub-Committee on

Carriage of

Cargoes and Containers

ASSEMBLY

SECRETARIAT

COUNCILMSCCCC

Strategic Directions

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Background IMO Rule

IMO Rule

IGC code

IGF code

GAS storage

tank

LNG fueltank

1983 2015

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Background Experiments and requirements

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*RESOLUTION MSC 370(93) AMENDMENTS TO THE INTERNATIONAL CODE FOR THE CONSTRUCTION AND EQUIPMENT OF SHIPS CARRYING LIQUEFIED GASES IN BULK (IGC CODE)*RESOLUTION MSC 391(95) ADOPTION OF THE INTERNATIONAL CODE OF SAFETY FOR SHIPSUSING GASES OR OTHER LOW-FLASHPOINT FUELS (IGF CODE)*RESOLUTION MSC 370(93) (IGC CODE)

[IGC CODE]9% nickel – double normalized and tempered or quenched and tempered See note 6.Austenitic steels, such as types 304, 304L, 316, 316L,321 and 347Aluminum alloys, such as type 5083Austenitic Fe-Ni alloy (36% nickel)

TENSILE AND TOUGHNESS (IMPACT) TEST REQUIREMENTS

[IGF CODE]9% nickel steel – Double normalized and tempered or quenched and tempered See note 6.Austenitic steels, such as types 304, 304L, 316, 316L,321 and 347 Solution treatedAluminum alloys, such as type 5083Austenitic Fe-Ni alloy (36% nickel)

TENSILE AND TOUGHNESS (IMPACT) TEST REGULATIONS

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Background Characteristics of existing three types of steel

Property

Weldability

Economic efficiency

Corrosion resistance

9% Ni steel

Low

High

High

SUS 304L

High

Low

High

Aluminum 5083

High

Low

High

NewMaterial

?

?

?

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Background Future schedule for amendment

Year

Activity

2019 2020 2021 2022 2023 2024

1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q 2Q

Code

Amendment

MSC

101 102 103 104 105 106 107

CCC

6 7 8 9 10

Approval Adoption Acceptance (‘24)● ● ●

●

A proposal for a new metallic material amendmentAnd confirmation of submission to MSC

Submit a report after discussing code amendment

Amendment in the CCC7 WG

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Background The need for process development

No process

Never enacted

about new steel

for LNG storage

Develop

materials

Develop

a Process

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Problem

analysis

•Why other steels have not been commercialized

•Whether the two existing tests are sufficient

•Need for additional test

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Problem

analysis Why other steels have not been commercialized

Nickelsteels

Austeniticsteels

Aluminiumalloys

Why do IGC and IGF codes contain only three types of steel?“

”

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Problem

analysis Whether the two existing tests are sufficient

Property

Toughness

“”

Can we judge new material performances

sufficiently by only the Tensile test and the

Charpy impact test?

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Problem

analysis Need for additional test

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Use the

New Metallic

Materials

“”

What additional requirements must be met to use new materials ?

Toughnesstest

Hardnesstest

Strengthtest

Stiffness test

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Proposal &

Conclusion

•Solution- Additional experiment

•Conclusion- Procedures for code listing of

new metallic material

s

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Proposal Additional experiment (1)

ClassifyBase

MetalWelded

joint

▪ Mechanical Property

▪ Chemical composition

▪ Fatigue test

▪ Hardness test

▪ Drop weight test

▪ Corrosion test

▪ Micrographic examination

▪ Bending test

▪ Hardness test

▪ Cross-weld tensile test

▪ CTOD test

▪ Ductile fracture toughness test

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Proposal Additional experiment (2)

Requirements Base MetalWeld

conditionSuccess/Fail

Tensile test ✓ ✓

Charpy impact test ✓ ✓

Fatigue test ✓ ✓

Hardness test ✓

Drop weight test ✓

CTOD test (Crack Tip Opening Displacement)

✓

Chemical composition ✓

Bending test ✓

Track Record - -

Design Requirement - -

Certification Non-Certification

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Proposal Additional experiment (3)

1. Track record

Record the date and the

problem, characteristics that

the ship has visited the

specified route or

destination.

2. Regular survey

NDT (Mandatory) + inspection

items (Classification society)

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Proposal Additional experiment (4)

Loadingunloading

System configuration

< Lab-scale tank test>

Propertyevaluation

Codeamendment

1. Evaluation items

- Macrostructure

- Impact test

- Bending test

- Tensile test

- Hardness test

- Others

2. Experiment period

- Set up the experimental

period considering ship life

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Conclusion Procedures for code listing

Operational safety test

Track recordsLab scale test

Amendments

Register to IGC and IGF

codes when all

conditions are met.

Experiments

1) Tensile test

2) Charpy Impact test

3) Additiona test

• BM/ Welded joint

l

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Conclusion Amendments to the IMO ruleTable 7.5.6 PLATES, SETCIONS AND FORGINGS FOR CARGO TANKS, SECONDARY BARRIERS AND PROCESS PRESSURE VESSELS FOR DESIGN TEMPERATURES BELOW -55⁰C AND DOWN TO -165⁰C Maximum thickness 25mm

Minimum designtemperature (⁰C)

Chemical composition See note 5 and heat treatment Impact test temp.(⁰C)

-1659% nickel steel – double normalized and tempered or quenched and tem-pered

-196

-165Austenitic steels, such as types 304 , 304L , 316, 316L, 321 and 347 solution treated

-196

-165 Aluminium alloys such as type 5083 annealed Not required

-165 Austenitic Fe-Ni alloy (36% nickel). Heat treatment as agreed Not required

-165 New metallic material. Heat treatment as agreed -196

-165 New metallic material. Experiment as agreed -196

1. TENSILE AND TOUGHNESS (IMPACT TEST REQUIREMENTS)

1.1 Sampling frequency

Plates Each “piece” to be tested

Sections and forgings Each “batch” to be tested

1.2 Toughness (Charpy V-notch test)

Plates Transverse test pieces. Minimum average energy value (KV) 27J

Sections and forgings Longitudinal test pieces. Minimum average energy vale (KV) 41J

1.3 Additional test (Bending test , Fatigue test, CTOD test .etc)

Plates -

Sections and forgings -

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Reference

• RESOLUTION MSC 370(93) AMENDMENTS TO THE INTERNATIONAL CODE FOR

THE CONSTRUCTION AND EQUIPMENT OF SHIPS CARRYING LIQUEFIED GASES

IN BULK (IGC CODE)

• RESOLUTION MSC 391(95) ADOPTION OF THE INTERNATIONAL CODE OF

SAFETY FOR SHIPS USING GASES OR OTHER LOW-FLASHPOINT FUELS (IGF

CODE)

• CCC 6-4-1 - Draft amendments to the IGC and IGF Codes (Republic of Korea)

• CCC 6/4 – Report of the Correspondence Group (Marshall Islands)

• CCC 6-INF.5 - Operational Experience of High Manganese Austenitic Steel for

Cryogenic Service (Republic of Korea) (3)CCC5/INF.8

• CCC 6/WP.4 – Report of the Working Group

• CCC 5-INF.8 - Updated technical information for High Manganese Austenitic Steel

for Cryogenic Service (Republic of Korea)

THANK YOU

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Presented by Neo