OPTA-PERIPH Cryogenic liquid Sampling range
LNG ISO 8943 AUTOMATIC SAMPLING SYSTEMS
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| Recognized as the best performing true vacuum LNG Probe & Supercritical liquid to gas Vaporizer. |
Continious LNG Autosampler Continuous Autosampler with discrete sample holder level and volume tracking for Service factor validation. |
Intermittent LNG Autosapler Advanced Intermittent Autosampler: expansible sealed receptacle rather than motive piston for absolute reliability. |
LNG SAMPLING ANCILLARIES
Sampling for LNG and for: LPG, bio and e-methane either green H2 mixtures.
SPOT SAMPLING SYSTEMS
The expansible sealed receptacle of 40 CC volume is in fully compressed ‘locked’ state whilst the LNG liquid is being spot captured. This spot sampling in this expansible sealed receptacle out of vapor coexistence make it possible to constitute a sample whose composition in close volume is not compromised by the change to gaseous state generating the reference gas whose lab. analysis will give the true composition.
Typical applications:
LNG FRSU liquid phase spot sampling - LPG liquid phase Carriers spot sampling (C3/C4 and traces of C5 hydrocarbons) – LCO2 liquid phase spot sampling (H2O/O2+…ppm traces) - LH2 liquid phase spot sampling (Fuel cell quality standard)
LPG Liquid phase composite SAMPLING SYSTEM
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Constant pressure and constant volume expansible receptacle bring an unprecedented reliability to this operation. | |
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| Reciprocating Fast loop Pressure cryogenic amplifier maintaining LPG above vapor pressure | Liquid grab composite dosing pump | 15 barg Cryogenic liquid expansible receptacle 500 CC |
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LNG CUSTODY TRANSFER ANALYSIS by Gas Chromatograph, Calorimeter and Densimeter |
ANALYSER SYSTEM
Subject:
For LNG custody transfer it is now a common practice to determine the composition, density and WI by direct on line GC plus indirect lab analysis methods. A precise sampling according to the
SAMPLING PROBE and VAPORIZER
This superinsulation system is designed for providing thermal insulation by hight vacuum and enthalpy rise is controlled to be inferior of the subcooling degree.
In the vaporizer, LNG transformation in supercritical state eliminates fractionated vaporization which would generate fluctuations in the gas composition during
LNG regasification.
- Performances:
WI, composition and density measurements with better repeatability than 0.01 mj/m3 (ISO 6976) and reproductibility lab / process GC better than 0.15% (ASTM D1945)
SPOT & CHARGE SAMPLING SYSTEM
Applicable standards:
ISO 8943-1991: LNG continuous sampling method
ISO 8943-2004: draft of sampling with piston
cylinder
EN 12 838: test to assess the LNG sampling
suitability
Operation:
At vaporizer outlet sample gas is flow controlled and accumulated in constant pressure piston floating cylinder holder.
Purging device is operated for the removal of any residual gas from previous operations and the spot transportation containers are automatically charged every hour during the transfer in compliance with the fill and empty method Annex D of ISO 10 715.
Charge transportation containers at the end of transfer are automatically fed at 7 barg pressure within the same method.
The system processing is controlled via a solenoid valve actuator bus manifold and sampling sequence with alarm history are reported on the controller screen with data acquisition by keyboard. Customer data interchanges for maintenance acquisition and SCADA are supported by Data Highway through Modbus or other protocol.