Double Wall Piping System (Marine & Offshore)
LNG Fuel Gas Supply Piping System
Double Wall Piping System is to supply the fuel gas to main engine with purpose of protection of explosion and leak-check mainly.
Double wall pipe has excellent performance against high pressure and extreme temperatures.
Low Pressure & Cryogenic Temperature | High Pressure | |
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Size | Inner Pipe DN15~300 in general Outer Pipe DN50~450 in general |
Inner Pipe DN25~50 in general Outer Pipe DN100~150 in general |
Fluid | Natural Gas & Liquified Gas | Natural Gas (Vaporized) |
Design Pressure | 10~16Bar(g) | 300~420Bar(g) |
Design Temperature | -269 ℃~60 ℃ in general range | -90 ℃~60 ℃ in general range |
Material | Inner Pipe: Stainless Steel 316L Outer Pipe: Stainless Steel 316L |
Inner Pipe: Super Duplex or Duplex Outer Pipe: Duplex or Stainless Steel 316L |
Flange for Double Wall Pipe – Double Lip Flange
High Pressure
Low Pressure
- Low Pressure & High Pressure
- Vent.holes are calculated in accordance with the air volume.
Flange - High Pressure
Design Pressure | 300~420Bar(g) |
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Design Temperature | -90℃ ~ 60℃ in general |
Material | Super Duplex , Duplex, & Stainless Steel 316L |
Flange - Low Pressure
Design Pressure | 10~16Bar(g) in general |
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Design Temperature | -20℃ ~ 60℃ in general |
Material | Stainless Steel 316L |