Introduction to KC-1 CARGO CONTAINMENT SYSTEM

2016-10-20

Senior Researcher

Jun-ho, Seong

CONTENTS1. IntroductionII. Design Concept of KC-1III. Summary

CONTENTS1. IntroductionII. Design Concept of KC-1III. Summary

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Concept design

Basic Design

Structural Tests

Mock-up test

New cargo containment system (KC-1) development employing KOGAS membrane

KC-1 : AIP(Principle), DA(Design) 4 Class Approval

Patents : Registration (46)

CCS Design/Testing Technology acquisition

Element Design

Constructability Review

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LNG Cargo Tank

Independent Tank Hull Integrated Tank

Type A Type B Type CP ≤ 700 mbarFull Secondary Barrier

P ≤ 700 mbarPartial Secondary Barrier

P ≥ 2000 mbarNo Secondary Barrier

Prismatic (SPB)

Spherical (MOSS)

Cylindrical

Bilobe

MembraneP ≤ 700 mbarFull Secondary Barrier

Mark III (GTT) NO.96 (GTT)KC-1 (KC)Prismatic

CONTENTS1. IntroductionII. Design Concept of KC-1III. Summary

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Basic Principles of KC-1 System

Basics : The primary and secondary membrane are made of non-continuous, corrugated SUS 304L, 1.5mm thickness. They are fixed to the membrane anchor and supported by the insulation system

Characteristics :

• In order to enhance gas leak proof condition, the KC-1 has double metal barriers

• No thermal shock at the secondary barrier in the case of LNG leakage of primary barrier

• Minimization of effects on the insulation system from hull deformation as the insulation is not bonded to the hull

• Easy to manufacture and install due to employment of one layer of insulation panel

• No weld on the membrane corrugations at site

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Main-Structure of KC-1 System

Primary Barrier

Inter-Barrier Spacer

Secondary Barrier

Insulation

Membrane Anchor

Corner Anchor

SystemCharacteristics

Barrier- Primary and Secondary barrier

with corrugation- Secondary barrier is located

near primary barrier One layered insulation

PrimaryBarrier

KOGAS Membrane type 1.5mm SUS304L Same corrugation size on plane No cross corrugation

SecondaryBarrier

Verified Safety using the structure identical to primary barrier

1.5mm SUS304L

Corrugation No need to reinforce

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Typical Configuration of KC-1 System

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(a) Mark-III membrane (b) KC-1 membrane

3중의 단속주름이 지그재그로 배치된 형상으로 프레스 금형 가공에 의하여 제작됨.

현장 주름부 용접을 없앰으로써 용접품질 개선을 통한 생산성 향상 도모.

Features of KC-1 Membrane

Non-continuous and Arch-shaped end corrugations

Grid shape formed by corrugations is rectangular as shown below

To improve reliability of tightness, the membrane is non-continuous corrugated type with three lanes applied with flat welding joint at site

No welding points on corrugations

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멤브레인 설치를 위한 기본단위로 멤브레인 시트와 평판을 프라즈마 맞대기 용접(Plasma Arc Welding, PAW)으로 제작

품질검사는 치수 및 용접부의 Visual test 및 DPT를 수행

Membrane Panel

Membrane panel consists of membrane sheet and flat sheet

Manufactured by using automatic Plasma Arc Welding

Visual test, and DPT on welding points and checking dimensions are conducted in process of quality control

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Fig. Membrane Installation Work flow

Membrane installation

Supply Membrane Return Carrier

Longitudinal Rail

MovingRail

MembraneCarrier

Duration reduction : Transfer and install the membrane panel automatically

Work flow : supply membrane membrane installation return carrier

Available in overhead, vertical and horizontal installation

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Corner Fixture

Corner fixture consists of wing plate and base plate

Wing plate is designed to withstand only tensile load

Base plate is fixed to inner hull using bolts

Compressive load due to liquid pressure and sloshing load have no effect on wing plate

Wing plate

Base plate

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It is composed of two plates and connected to membrane by welding

The thick plate has function as the primary and secondary barrier at corner parts.

The thick plate can be sliding in longitudinal direction

The thick plate is fastened to holder using bolt

Thick Plate

Moving Rib

Moving Rib

Fixing Rib

Corner Fixture

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Membrane anchor is used to fixation parts of membrane in the insulation panels

Location : inside insulation panel

Membrane anchor is assembled with insulation panel at fabrication shop

Membrane anchor can be sliding in horizontal direction

Membrane anchor is fixed in vertical upward direction and free in downward direction

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(a) Flat Panel(FP) (b) Corner Panel(CP)

Insulation Panel(=IP) is a bonded sandwich structure with an only one layer including back plywood, rigid closed cell foam panel and top plywood

Uses PUF insulation instead of R-PUF Excellent thermal isolation

(thermal conductivity approx. 10% lowers)

Insulation panels are easy to manufacture

Use of environmentally friendly, high-performance insulation (blowing agent : HFC-245fa)

Insulation panel is generally divided by Flat Panel(FP) and Corner Panel(CP)

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Secondary membrane

Female fixing cap

Inter barrierspacer

Male Fixing cap

At the shipyard

Female fixing cap spot welded at shop

Male fixing cap

at fabrication shop

Main function of the IBS is that the damage on primary membrane should not have an influence on the secondary membrane by maintaining regular distance

The female fixing cap is spot welded on secondary membrane and inspected at fabrication shop

Improving the reliability of secondary membrane

Put in the male fixing cap after installation of IBS at a shipyard

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Design : Rectangular shaped structure (2 Pump columns, 1 Emergency column, 1 Filling nozzle)

Pump Tower be welded to Liquid dome cover

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Two bottom support for fixing the horizontal movement and rotation

Support 1 : Fixed in the horizontal direction

Support 2 : Control the rotational behavior

Support 1 Support 2

CONTENTS1. IntroductionII. Design Concept of KC-1III. Summary

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Description Mark-III (GTT) NO 96 (GTT) KC-1

Membrane

Material SUS304L (1.2mm) 36% Ni Steel (0.7mm) SUS304L (1.5mm)

Size 1,020mm×3,060mm 500mm(B)×Tank Length 3,700mm×7,600mm

Insulation Panel

Material R-PUF Plywood + Perlite (NO 96) PUF

Thickness(Typ.)

270mm (170+100) 530mm (300+230) 270mm

<Mark-III> <NO 96> <KC-1>

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Unique containment system using closed double metal barriers

Enhance gas leak proof condition at primary and secondary barrier

No thermal shock at the secondary barrier even in the case of LNG leakage

Duration reduction : Transfer and install the membrane panel with the help of MSS

Uses PUF insulation instead of R-PUF excellent thermal isolation

(thermal conductivity approx. 10% lowers)

Simple insulation system which employs only one layer of insulation

Insulation panels are easy to manufacture

Reduction of the number of quality control items during construction

Enables a short construction term of the containment system

(No welds on the corrugation at erection stage, using the facilitation of large capacity etc.)

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FLNG FSRU

SSLNG

LNGFueledShip

BunkeringVessel

LandStorage

Tank

Thank you for your attention !