TECHNOLOGY
CORE TECHNOLOGY

CNG & Hydrogen Containers


Production capacity of CNG & hydrogen containers with independent press process, not the world's only extrusion type

Technology
Technical summary
Key point & Know How
Forging
· Large Size Ai. Billet(6061-13")
· 7,000ton Forging Press
· Backward Extrusion
· Diameter 15" to 20" or more

· Material and mold temperature management
· Forging speed, optimal management of Metal Flow
· Earning, straightness, thickness uniformity
· Mold, Tool Design (Die, Punch..)

Flow-Forming
· Mandrel Forging
· Metal Incremental Forming
· Adjustable thickness arbitrarily
· Different thicknesses can be applied to one tube in two or three stages
· External diameter 20", length 2,300mm can be produced
· Product production technology without connecting parts (welding parts)

· Mandrel Design Technology
· Forming Tool (Roller) Design Technology
· metal flow direction management technology
· Working condition setting management technology according to the characteristics of materials
· Product production technology with uniform metal properties
· Working Conditions Management Technology with Changes in Diameter and Length

Neck-Spinnning
· Large SIZE Necking Technology (available up to 20" outside diameter)
· A shape that gradually increases in thickness toward the end of the dome
· a shape in which the dome of the outside is naturally connected


· Material Temperature Management
· Chi, Tool Design Technology
· Shape Design and Implementation Technology
· Metal flow
· Dome Thickness Management


Business fields and technologies

Major facilities
(Unit : mm)
Forged
Flow Forming
Inner diameter
External diameter
Thickness
Length
Flow-Forming
Styles
Tubes
295

357

371

381

430

460

482

311
370
383
392
441
472
502
5.0
6.0
6.7
7.6
9.5
13.0
최소 1,000 ~
최대 3,220
Producible Specifications
External diameter 13"–20" Thickness: 4.0 mm – 15.0 mm
Note
Need to negotiate for new product development


Production capacity by process

Process
Forging
Flow-Forming
Grinding
Cleaning
Facilities
1
3
1
1
Monthly production capacity
3,200
600
1,300
1,300


Manufacturing Method and Characteristics of CNG Containers

Tube TYPE
Materials and Method
Characteristic
Weight
TYPE 1
· Materials : steel Tube
· Method : Manufacture Necking Steel Tube
· Strength : Low Price, Simple process
· Weakness : Heavy weight, Corrosion, Explosion
· 0.80kg/L
· 104Kg/130L
TYPE 2
· Materials: Steel Tube, Composite (Glass Fiber)
· Method: Strengthen the body part with composite material on the steel liner, Hoop Wrapped Cylinder
· Strength : Low Price, 10% light weight than TYPE 1
· Weakness : Heavy weight, Corrosion, Explosion
· 0.72kg/L
· 93.6Kg/130L
· Type 1 : -10%
TYPE 3
·Materials: Aluminum liner, composite (carbon fiber)

· METHOD: Reinforced the entire aluminum liner with a probe fiber, Full Wrapped

· Strength : Light weight(56% light weight than TYPE 1), Safety(No explosion)
· Weakness : High Price, Complicated process
· 0.34kg/L
· 45.0Kg/130L
· Type 1 : -56%
TYPE 4
· Materials: Plastic liner, metal BOSS, composite (carbon fiber)

· METHOD: Strengthen the entire liner assembled with plastic body and metal BOSS with a probe fiber, Full Wrapped

· Strength : Light weight(58% light weight than TYPE 1), Safety
· Weakness : High Price, Complicated process, Leakage Gas, Need improved desing of combination with Boss
· 0.34kg/L
· 44.0Kg/130L
· Type 1 : -58%


* Hoop Wrapped : A method of reinforcing rupture strength by winding only the body part of the container with composite materials - TYPE 2

* Full Wrapped: Method of securing rupture strength and stability by winding the entire container (Liner) with composite materials - TYPE 3 and TYPE 4

Major production process

Major facilities
AL.6061 Billet
Forging
Machining
Flow-Forming
Process
Production


Raw Ingredients Components and Mechanical Properties

Element
Mg
Si
Cu
Fe
Cr
Zn
Ti
Mn
Bi
Pb
Others,
Each
Others,
Total
Ai
Composition
(ISO Standard)
0.80

~1.20

0.40

~0.80

0.15

~0.40

~0.70
0.04

~0.35

~0.25
~0.15
~0.15
~0.003
~0.003
~0.05
~0.15
Balance
Compositon
(GTech Report)
0.90

~0.95

0.57

~0.60

0.31

~0.35

0.13

~0.15

0.07

~0.08

0.003

~0.006

0.02

~0.03

0.01

~0.02

0.0017

~0.0024

0.0008

~0.0018

Max

0.014

Max

0.0335

97.81

~97.91

Category
Range
ISO11439
KGS412
G.T Report
Elongation
%
Min 14%
Min 14%
15.7%~19.1%
Yield strength
Mpa

Kgf/cm²

KSI

-
-
281.45~303.03

28.7~30.9

40.82~43.95

Tensile strength
Mpa
Kgf/cm²
KSI
-
-
326.56~342.25
33.3~34.9
47.36~49.64



Name : OneFutech Co., Ltd. |  CEO : Yoon Sun-ki  |  TEL : 041-752-5715
FAX : 041-752-5057  |  Business number: : 508-85-11236

Address  : 274 Gunbuk-ro, Jewon-myeon, Geumsan-gun, Chungcheongnam-do, Republic of Korea


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