High-pressure Small Bore Tubing in FPSO & FLNG Facilities
Application Context, Standards Alignment, and Execution Control

In floating production projects, welding piping remains the structural backbone of hydrocarbon processing, supporting by decades of engineering practice under frameworks such as ASME B31.3.

But small bore high-pressure tubing systems are not secondary of informal solutions.

They are structured subsystems applied across:

·       Process impulse lines

·       Hydraulic and pneumatic controls

·       Chemical injection units

·       Analyzer and grab sampling systems

·       Instrumentation air distribution

And they are governed by defined procurement and installation requirements, including international specifications such as IOGP S-716.

When applied within its intended service envelope, tubing can add value:

·       Eliminate field welding within its scope

·       Reduce hot-work exposure offshore

·       Improve installation flexibility during modular integration

·       Support late-stage hook-ups and commissioning activities

In highly constrained FPSO and FLNG environments, particularly during brownfield or SIMOPS conditions, those factors mater.

Tubing systems are not simplified piping, they require:

·       Strict single-manufacturer fitting control

·       Defined wall thickness of pressure design per ASME B31.3

·       Controlled material selection for marine and sour environments

·       Installer certification and proper assembly tools

·       Defined routing, support spacing, and vibration mitigation

·       Structured inspection, PMI, and leak testing

The integrity of a tubing system depends less on welding metallurgy and more on assembly discipline, material compatibility, and specification adherence.

The accompanying article explores how small bore tubing systems fit within the broader engineering framework of floating production assets, not as a shortcut, but as a controlled and specification-driven solution.

In offshore projects, the real conversation is not tubing vs piping.  It is selecting the right system for the right service and executing it correctly.

👉 Read the full analysis at link below

#FLNG #FPSO #OffshoreEngineering #EPC #EnergyIndustry #OilAndGas #ProcessPiping #TubingSystems #HighPressureTubing #Commissioning #BrownfieldProjects #MarineConstruction #FloatingProduction #EngineeringLeadership #ProjectManagement #Fabrication #Swagelok #Parker #InstrumentationEngineering #HydraulicSystems #FloatersIntelligentia #Intellis

🔥 NEW on Floaters Intelligentia: GTT NEXT1 Changes the Game

GTT’s NEXT1 containment system—now approved by Bureau Veritas and Lloyd’s Register—delivers Mark III Flex+‑level thermal performance (~0.07% BOR) thanks to its dual‑metallic membrane and reinforced PU foam insulation.

Compared to the classic Mark III system used on major FLNGs, which operates around 0.15% BOR, NEXT1 cuts boil‑off nearly in half—a major gain for efficiency and offshore reliability. 

In our new deep dive, we also explain why Mark III became more widespread than NO96, despite NO96’s robust metal‑metal design.

👉 Read the full analysis on Floaters Intelligentia article at link below
(thermal performance, system comparison table, and what NEXT1 means for the future of LNG & FLNG)

#LNG #FLNG #MaritimeEngineering #GTT #NEXT1 #MarkIII #NO96 #FloatingLNG #EnergyTransition #Shipbuilding #MarineTechnology #LNGC #OffshoreEngineering #ContainmentSystems #FloatersIntelligentia

‍🚢 LNG Containment Systems in FLNG: GTT vs SPB vs MOSS (UPDATED FEBRUARY 2026)

As FLNG projects scale globally, the choice of LNG containment technology has become one of the most strategic decisions in project design, EPC execution, and lifecycle performance.

Floaters Intelligentia has just published a fully updated comparison of the three dominant tank technologies used in FLNG units:
🔹 GTT Mark III membrane systems
🔹 SPB (Self‑Supporting Prismatic Type B)
🔹 MOSS spherical tanks

The article examines how each technology impacts:
✅ Construction sequence & yard strategy
✅ Thermal and structural performance
✅ Sloshing resistance and operational envelope
✅ CAPEX, schedule risk, and maintainability
✅ Suitability for newbuild vs conversion FLNG units

Key insights:
✨ GTT membrane systems remain the benchmark for newbuild FLNG thanks to high shape efficiency and parallelized installation (hull completion followed by in‑hold panel installation), supported by a mature global yard ecosystem.
✨ SPB tanks—pioneered by IHI and now featured on Wison’s Nguya FLNG for Eni—demonstrate fast‑track potential at the module level when tanks are fabricated off‑hull and integrated as a package. However, SPB installation sits on the dry‑dock critical path and requires heavy lifts, so the overall schedule advantage depends on yard capability and execution readiness.
✨ MOSS tanks continue to play a vital role in FLNG conversions (e.g., Gimi), offering outstanding sloshing resistance but lower volumetric efficiency, which makes them less common in newbuild FLNG.

This updated piece includes:
📌 A revised technical comparison table
📌 A detailed construction & integration section
📌 Thermal management analysis (cofferdams vs void systems)
📌 A full set of APA‑formatted references
📌 Updated field examples from Prelude, Coral Sul, Coral Norte, PFLNGs, GTA Gimi, Nguya, and Genting FLNG

🔍 If you work in FLNG development, EPC execution, naval architecture, or LNG operations, you’ll find practical insights drawn directly from real projects and shipyard practices.

👉Read the full article below: