Liquified Gas Sampling Systems
Closed-Loop Samplers with Outage Tube & Expansion Chamber
Spirare Energy's Liquified Gas Sampling Systems are engineered for the safe, representative, and emission-free collection of pressurized liquefied gases, including LPG (Propane, Butane), propylene, butadiene, LNG, light hydrocarbons, and high vapor pressure liquids. Because liquefied gas expands dramatically with even minor increases in ambient temperature, our systems incorporate vital outage and expansion safeguards to prevent hydraulic overpressurization and cylinder rupture during transportation and laboratory analysis.
Designed in strict compliance with ASTM D1265, GPA 2174, and DOT/TPED standards, the series features precision internal outage tubes (dip tubes providing 10% to 60% vapor outage) or auxiliary expansion chambers (75cc, 150cc, 300cc) to guarantee a minimum 20% vapor headspace. Coupled with single-handle synchronized valve linkages, continuous fast-loop bypass routing, and dedicated Nitrogen (N2) purge connections, our samplers clear connection lines and quick-disconnect fittings before uncoupling, ensuring zero hazardous VOC emission or personnel exposure.
Standard wetted parts are manufactured in SS 316/316L, with exotic metallurgy (Hastelloy C-276, Monel 400, Inconel 625, Duplex 2205) and specialized Sulfinert / PTFE-coated cylinders available for sour gases and trace sulfur analysis. Spanning configurations from basic outage tube samplers (GS6) to multi-port bypass systems with expansion chambers (GS7–GS10) and secondary safety expansion skids (GS11), Spirare Energy provides robust, custom-engineered liquefied gas sampling solutions for refineries, petrochemical plants, and tank farm terminals worldwide.
Sampler Specifications & Models
Explore complete technical specifications, outage safety mechanics, and engineered configurations (GS6 to GS11) built for closed-loop liquefied gas sampling.
Sampler Specifications
Design LimitsTarget Fluid Media
LPG, Propane, Butane & Liquefied Gas
Engineered for liquefied petroleum gas (LPG), propylene, butane, propane, butadiene, LNG, ethylene, and high-vapor-pressure hydrocarbons.
Outage Safety Mechanism
Outage Tube & Expansion Chamber
Guarantees compulsory 20% vapor space (10% to 60% dip tubes or 75cc–300cc expansion chambers) to prevent hydraulic overpressurization per ASTM D1265.
Operating & Vapor Pressure
Up to 100 Bar.g (1500 psig)
Full line pressure containment designed for high vapor pressure media exceeding atmospheric boiling points.
Sample Cylinder & Expansion Sizes
150cc, 300cc, 500cc, 1000cc (DOT/TPED)
Seamless SS 316 sample cylinders with matching 75cc, 150cc, or 300cc auxiliary expansion chambers, certified to DOT-3E / TPED.
Material of Construction (MOC)
SS 316 / SS 316L (Standard)
Standard SS 316/316L wetted parts. Exotic options: Hastelloy C-276, Monel 400, Duplex 2205, Inconel 625, PTFE/Sulfinert coated cylinders.
Process & Flare Connections
1/4", 1/2", 3/4" OD / NPT / Flanged
Standard compression tube fittings or female NPT. Options: 1/2" RF Flange (ANSI Class 150/300/600/900/1500), quick-disconnect couplings.
Options Available & Custom Accessories
Mounting Plate & Enclosure Cabinets
SS 304/316 mounting plate, weather-proof IP protective cabinet with lockable door and viewing window (Optional, insulated, electrically heated, or steam heated).
Floor / Pipe Stand Assembly
2" NB stanchion pipe or MS / carbon steel (galvanized/powder-coated) or SS 304/316 mounting stand.
Auxiliary Expansion Chamber Assembly
Auxiliary expansion cylinders (75cc, 150cc, 300cc) with isolation needle valves, rupture discs, and relief valves.
Internal Outage (Dip) Tubes
Precision dip tubes (10%, 20%, 30%, 40%, 50%, 60%) to establish exact vapor headspace per ASTM D1265 / GPA 2174.
Single-Handle Valve Linkage
Synchronized mechanical linkage operating upper and lower valves simultaneously to prevent operator sequence error.
Nitrogen (N2) System Purging
Integrated N2 purge complete with pressure indicator (PI), check valve, and purge regulator to blow down lines before uncoupling.
Flexible Hose Connections
Metal flexible (M) or PTFE-core SS braided (P) quick-connect hoses with protective safety lanyards.
Automated Sampling Actuation
Pneumatic or electric actuators with sequence timer controller for automated liquefied gas sampling cycles.
Liquified Gas Sampling Systems (GS6 – GS11)
Outage Tube Type Liquified Gas Sampling System
Closed-loop liquefied gas sampler equipped with an internal outage dip tube inside the sample cylinder. After filling under line pressure, excess liquid is vented to flare/scrubber to create compulsory 20% vapor outage space before cylinder detachment.
Custom engineered skids available on request
| Model | System Type & Description | Purging / Operation | Action |
|---|---|---|---|
| GS6 | Outage Tube Type Liquified Gas Sampling System Closed-loop liquefied gas sampler equipped with an internal outage dip tube inside the sample cylinder. After filling under line pressure, excess liquid is vented to flare/scrubber to create compulsory 20% vapor outage space before cylinder detachment. | Internal Outage Dip Tube Sampling (ASTM D1265) Sequential Flare / Low-Pressure Header Vent with Outage Blowdown | |
| GS7 | Vent to Flare Type with Expansion Chamber Features an auxiliary expansion chamber connected in series with the sample cylinder. Once the primary cylinder is filled, a calibrated volume of liquefied gas is discharged into the expansion chamber and directed to flare, guaranteeing vapor headspace without field tilting. | External Expansion Cylinder + Flare Header Venting Sequential Expansion Depressurization to Flare / Vapor Recovery Header | |
| GS8 | Bypass Purge Type with Expansion Chamber Maintains continuous high-velocity process bypass circulation across the sampling panel to ensure fresh, representative liquefied gas reaches the cylinder without phase change or takeoff lag, backed by an expansion chamber for outage safety. | Fast-Loop Continuous Bypass + Expansion Chamber Continuous Process Fast-Loop Bypass + Expansion Chamber Flare Bleed | |
| GS9 | Expansion Chamber with Inert Purging Integrates an auxiliary expansion chamber with dedicated high-pressure Nitrogen (N2) purging to thoroughly flush quick-connect couplings, bypass lines, and valve deadlegs before cylinder detachment, eliminating hazardous VOC exposure. | Dedicated Inert N2 Purge + Expansion Chamber Ullage Inert N2 Line & Fitting Flushing + Expansion Chamber Depressurization | |
| GS10 | High Volatile System Purge with Expansion Chamber Heavy-duty severe service sampler featuring full system inert purge circuits, tandem single-handle valve linkage, dual pressure indicators, and a safety expansion chamber for maximum containment. | Complete System Purge + Single-Handle Tandem Linkage Full Loop Inert N2 Purging + Dual Block & Bleed Scrubber Venting | |
| GS11 | System Purge with Additional Safety Expansion Cylinder Skid Advanced safety configuration incorporating both a primary sampling cylinder and an integrated secondary safety expansion cylinder with automated interlocks to guarantee absolute DOT/TPED transport safety under extreme temperature variations. | Dual Cylinder Safety Architecture + Automated / Manual Purge Automated Multi-Stage Inert N2 Blowdown + Closed Flare Recovery |
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