Major Business Areas
Offshore
Rack and Chord for Jack-Up Rig
Rack & Chord made by our company is used on many Jack-Up Rigs that operate in the major sea areas in the world.
Steel Plant
Our fabrication skill is inherited from our former company of Nippon Steel & Sumikin Engineering Co. Ltd., and it has been highly esteemed from many customers.
There are many fabrication and supply records of extra-large welded structures such as blast furnaces and converters to major domestic steel makers.
Steel Pipes and Tubes for Structure
Steel pipes for structures are fabricated with our large bending roll and pressing machines. RSJ is one of few domestic companies able to fabricate bending over 100mm thickness steel plate. This valued skill is adopted for Tokyo Sky Tree and Tokyo International Airport (Haneda) D-runway jacket.
Heat Treatment
Our heat treatment facilities – furnace and cooling bath – are capable of variety of heat treatment such as extra-thick material and large welded structures.
Supply Record
Offshore
Rack and Chord for Jack-Up Rig Supply record 85 units (as of January 2018)
◆ Rack
◆ Rack and Chord
◆ Heat Treatment
Major Jack-Up Rig Design
KFELS B Class
- Leg Length
- 517 ft
- Rack Thickness
- 177.8 mm
- Chord Thickness
- 57.15 mm
- Max Water Depth
- 400 ft
- Max Drilling Depth
- 30,000 ft
- Material
- EQ70
KFELS N Class
- Leg Length
- 568 ft
- Rack Thickness
- 177.8 mm
- Chord Thickness
- 82.55 mm,110 mm,115 mm
- Max Water Depth
- 492 ft
- Max Drilling Depth
- 40,000 ft
- Material
- WEL-TEN780Mod-060
KFELS Multi-Purpose Self-Elevating Platform (MPSEP)
- Leg Length
- 348 ft
- Rack Thickness
- 177.8 mm
- Chord Thickness
- 57.15 mm,82.55 mm
- Max Water Depth
- 213 ft
- Max Drilling Depth
- –
- Material
- WEL-TEN780Mod-040
MSC CJ70-X150-MD
- Leg Length
- 678 ft
- Rack Thickness
- 210.0 mm
- Chord Thickness
- 62.5 mm,82.5 mm,95.0 mm,120.0 mm
- Max Water Depth
- 400 ft
- Max Drilling Depth
- 30,000 ft
- Material
- EQ70
Large Welded Structure for Steel Making Facility
◆ Blast Furnace Tuyere Mantel
◆ Steel Converter
◆ Hot Stove Furnace
◆ Hearth Roll for Continuous Annealing Equipment (CAPL)
Extra thick Large Diameter Pipe
Center Pole for Offshore Wind Turbine
- Specification
- SBHS700W
- Tensile Strength (TS)
- 780 ～ 930 N/㎟
- Yield Point (YP)
- ≧ 700 N/㎟
- Thickness
- 11 ～ 75 mm
- Outer Diameter
- 1,800 mm
- Length
- 30,500 mm (max)
Steel Pipe for Tokyo International Airport (Haneda)
- Specification
- SM570-Z25S
- Tensile Strength (TS)
- 570 ～ 720 N/㎟
- Yield Point (YP)
- ≧ 420 N/㎟
- Thickness
- 18 ～ 70 mm
- Outer Diameter
- 1,000 mm
- Length
- 21,000 mm (max)
Steel Pipe for Tokyo Skytree
- Specification
- BT-HT500C
- BT-HT630C
- Tensile Strength (TS)
- 590 ～ 740 N/㎟
- 780 ～ 930 N/㎟
- Yield Point (YP)
- 500 ～ 650 N/㎟
- 630 ～ 750 N/㎟
- Thickness
- 36 ～ 100 mm
- Outer Diameter
- 1,100 ～ 2,300 mm
- Length
- 10,000 mm (max)
Others
◆ Spherical Shell Tank for LNG Vessel (Aluminum)
◆ Rotary Kiln
◆ Shield Parts Bending (Stainless Steel)
◆ Jacket Top Leg