FAQ
SAMPLING SYSTEMS FOR NATURAL GAS AND LIQUIDS ANALYSIS
Sampling probes
GENIE's range of sampling probes includes a dozen models.
Each model has different characteristics: with or without pressure regulation, process connection, operating pressure, insertion length, insertion method...
To quickly find the right probe for your application, consult the comparison chart below:
Download the comparison table for sampling probes:
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Separators and Filters
The 2 GENIE 123 and GENIE 133 separators are the largest in the A+ Corporation liquid/gas separator range. Although they can handle identical flow rates and temperatures, their design and use are different.
The GENIE 133 separator has a larger internal cavity than the GENIE 123 separator, and can withstand higher pressures.
The GENIE 133 separator is ideal for continuous sampling of a gaseous source where large quantities of liquids are present, e.g. for the collection and processing of natural gas, for CEMS and certain refinery and petrochemical gases.
It can be mounted on a sampling probe (GENIE GPHV or 760) when the probe, fitted with a membrane at its end, is invaded by liquids. It can also be mounted before an analyzer or pump to protect them.
Finally, it is recommended for sample pre-conditioning in applications where there is no bypass and liquids must be discharged from the separator by gravity.
Miscellaneous information
The composition of the membranes is patented and cannot be disclosed. However, we can confirm that Genie® membranes do not alter the composition of the gas sampled.
Tests have been carried out by A+ Corporation to determine whether the membrane with which Genie® separators are equipped alters the composition of the gas sample;
After several series of tests, chromatographic analysis showed that the composition of the sample was virtually identical, whether it passed through a Genie® membrane or not. The gas sample is therefore unaltered as it passes through the Genie® membrane.
You can read the report: Genie Membrane Testing
Are the probes PED-compliant?
TheEuropean Pressure Equipment Directive (PED) lays down the essential safety essential safety requirements for the putting into circulation of pressure equipment within the European Economic Area. The version currently in force is Directive 2014/68/EU of the European Parliament and of the Council of May 15, 2014 on the harmonization of the laws of the Member States concerning the making available on the market of pressure equipment. Its first version, Directive 97/23/EC of the European Parliament and of the Council of May 29, 1997 on the approximation of the laws of the Member States concerning pressure equipment, came into force on September 20, 1997.
The directive applies only to vessels with a maximum pressure PS of over 0.5 bar. It defines two groups of fluids (article 13):
- group 1: substances and mixtures considered hazardous - explosive, unstable, flammable, oxidizing, pyrophoric, self-reactive, toxic...
- group 2: other substances and mixtures.
Depending on the fluid group, the maximum allowable pressure PS - the pressure at which the safety device (valve) triggers - and the volume V, the equipment falls into a risk category, from lowest to highest.
GENIE sampling probes are subject to this Directive, as their maximum pressure exceeds 0.5 bar. They fall into fluid group 1.
Article 4 §3 specifies that " pressure equipment and assemblies whose characteristics are less than or equal to the limits referred to in paragraph 1(a), (b) and (c) and paragraph 2 respectively shall be designed and manufactured in accordance with the state of the art in use in a Member State in order to ensure their safe use. Pressure equipment and assemblies must be accompanied by adequate instructions for use." Pressure equipment with a low maximum allowable pressure, a small volume and/or a small nominal diameter therefore falls under the provisions of Article 4 § 3. Such pressure equipment does not have to comply with the essential safety requirements, but only with good engineering practice.
This is the case for sampling probes and other Geniefilters equipment, which have a small volume and a small nominal diameter.
Concerning CE marking, Article 4 §3 stipulates: "Without prejudice to other Union harmonization legislation providing for the affixing thereof, such equipment or assemblies shall not bear the CE marking referred to in Article 18."
This is why Genifilters sampling probes and other equipment, although subject to PED, are not CE marked. In this respect, you will find the certificate issued by A+ Corporation.
NB: sampling probes are considered to be pressurized accessories. Article 2 §5 defines pressure accessories as devices with an operational role whose casing is subject to pressure. This means that the device has an operational function other than resisting pressure. The pressure fitting can be attached to other pressure equipment by techniques such as bolting, brazing, soldering or welding. A pressure fitting has one or more operational functions, which may be, for example: measurement, expansion of the fluid being conveyed, sampling, removal of impurities or gases. A pressure fitting does not necessarily have removable parts. Typical examples of pressure accessories are: valves, pressure regulators, measuring chambers, pressure gauges, transparent level gauges, filters, expansion bellows, manifolds.
For further information, please consult Directive 2014/68/EU on the EUR-Lex website.