Gas Supply Double Wall Pipe

for Gas Fueled Ship

 

Gas supply lines passing through enclosed spaces are to be completely enclosed by a double wall pipe.
The gas fuel piping is to be installed within a ventilated pipe, the air space between the gas fuel piping and the wall of the outer pipe
is to be equipped with mechanical under pressure ventilation having a capacity of at least 30 air changes per hour.
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[FIX SUPPORT]

- Fix support to take load from
1 vertical pipe\'s section.

- Made with few parts and twist
1 joint to avoid drop of inner pipe.

- Design Pressure : H/P 175bar,
1234577777777788 L/P 10 bar

- Material : A790 S31803 (S32205),
123457777 A312 TP316L

[FLEXIBLE SUPPORT]

- Distance between supports : Around 1m

- Allow axial movement between inner and
1 outer pipe (thermal expansion)

- Support of inner pipe

- Material : Spring Stainless Steel &
123457 Engineering Plastic

[INSPECTION PLUG]

- Distance between supports : Around 1m

- Allow axial movement between inner and
1 outer pipe (thermal expansion)

- Support of inner pipe

- Material : Spring Stainless Steel &
123457 Engineering Plastic

[HELIX PIPE] & [COMPENSATOR]

- Pipe section with flexible element to take
1 movements between hull and engine

- Design Pressure : HELIX PIPE 320 bar
12345678912345 COMPENSATOR 10bar

- Material : A790 S31803 (S32205),
123456789 A312 TP316L & etc

[FLANGE CONNECTION]

- Flange connection for use in connection
1 with flexible joint between hull and engine
- Design Pressure : H/P 175 bar, L/P 10 bar
- Material : A790 S31803 (S32205),
123456789 A312 TP316L & etc

LNG Fuel Gas Supply piping System

• Double Wall Pipe from deck to Engine.

• Double Wall Pipe must be possible to pre-fabricate in welding sections.

• No painting is required for all assembly and welding sections in engine room. (Passivation only -Austenite Stainless Steel)

• Frequent inspection possibility of inner pipe and support.

• Minimized number of welding for pipe.

• 100% of X-ray inspection of welding on inner pipe.

• Minimized number of flange connections.

• Leakage test of inner as well as outer pipe is carried out prior to the overhaul.

• Vibration and thermal expansion are calculated and design.

• Burst pressure for Outer pipe is higher than Design Pressure.

Double Wall (Gas Supply) Pipe - High Pressure Type

Double Wall Piping is to supply the ‘Fuel Gas’ from FGSS to Main Engine, with the purpose of protection of explosion and leak-check mainly.

Size : Inner Pipe 32A ~ 50A, Special Size
12345Outer Pipe 100A ~ 150A, Special Size
Fluid : Natural Gas
Design Pressure : 330bar
Design Temperature : -50℃~ 60℃
Material : Inner Pipe -Duplex
12345678Outer Pipe –Duplex or Stainless Steel 316L

If you have any question, feel free to contact us !

We will contact you within 24 hours. We are ready to help you.

Double Wall Pipe - for Low Pressure

Double Wall Piping is to supply the ‘Fuel Gas’ from Gas Valve Unit to Main Engine, with the purpose of protection of explosion and leak-check mainly.

Size : Inner Pipe 50A ~ 100A, Special Size
12345Outer Pipe 80A ~ 150A, Special Size
Fluid : Natural Gas
Design Pressure : 10bar
Design Temperature : -50℃~ 60℃
Material : Inner Pipe – Stainless Steel 316L
12345678Outer Pipe – Stainless Steel 316L

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