Metering skid — Cryogenic LNG
A dedicated cryogenic tanker-loading metering system for liquefied natural gas — not simply a modified ambient-temperature skid.
Product overview · LNS-MS-LNG
The LineSig LNS-MS-LNG is a dedicated cryogenic skid-mounted tanker loading metering system for controlled and traceable transfer of liquefied natural gas. The architecture combines cryogenic Coriolis mass flow measurement, cryogenic pressure and temperature monitoring, batch/ESD control, controlled cooldown provisions, thermal relief for trapped liquid sections, cryogenic loading interfaces and vapour/BOG management according to the project loading philosophy.
LNS-MS-LNG is a cryogenic product configuration and is not an ambient-service skid with substituted materials. Final design requires project LNG composition, operating and design temperature/pressure, minimum design metal temperature, cooldown sequence, boil-off gas philosophy, loading-arm/ERC data, trapped-liquid thermal relief, thermal-movement analysis, insulation/vacuum-jacket philosophy and hazardous-area requirements.
Design
Design boundary: final LNG design requires project-specific cryogenic process data, BOG philosophy, hazardous-area classification, loading-arm/ERC data and thermal-stress analysis — no generic ambient-service pressure/temperature values should be carried into this model.
Technical specification
| Product family | LNS-MS Series — tanker loading metering skids |
|---|---|
| Model | LNS-MS-LNG — Liquefied Natural Gas |
| Metering principle | Cryogenic Coriolis mass flowmeter |
| Flow range / line size / design pressure | Project-specific; meter and line size selected from min / normal / max loading rate |
| Design temperature | Project-specific cryogenic LNG service; operating temperature typically near −162 °C, design minimum established from project process/relief cases |
| Measurement outputs | Mass flow, mass total; density/temperature outputs where supported by selected cryogenic Coriolis meter |
| Meter accuracy | Vendor/model/project-specific; custody-transfer configuration where required |
| Pressure drop | Calculated for the complete cryogenic skid with adequate liquid-phase/anti-flash margin at min/normal/max flow |
| Process connection | ASME / EN / project flange standard |
| Piping material | Cryogenic-compatible stainless steel / project-specific |
| Insulation | Cryogenic insulation or vacuum-jacketed configuration according to allowable heat leak, cooldown and project philosophy |
| BOG / vapour return | Project-specific BOG/vapour-return connection, sized for cooldown and loading operating cases |
| Hazardous area | ATEX / IECEx / NEC / local requirement as specified by project |
| Communication | Modbus RTU/TCP, Ethernet, pulse, frequency, analog/digital I/O as selected |
Selection note: Cryogenic Coriolis is the standard LNS-MS-LNG metering approach for direct mass measurement at LNG temperature. Meter selection is coordinated with cooldown, liquid-phase stability, pressure drop, thermal contraction and insulation philosophy; the sensor, transmitter and seals must be specifically qualified for the project LNG temperature and hazardous-area requirements.
Scope of supply
Loading sequence
Cryogenic inlet isolation/ESDV → Cryogenic strainer where specifically required → Cryogenic pressure/temperature measurement → Cryogenic Coriolis mass flowmeter → Cryogenic FCV/batch/ESD valve → Isolation → Cryogenic loading arm or hose/ERC — with controlled cooldown/recirculation and BOG/vapour return provided as parallel connections where required. Blocked-in liquid sections are protected by thermal relief.
Where it's used
Ordering information