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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
4
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
7
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
21
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 !