Liquefied Gas Quality Test Methods (LPG)

Draft Regulation of the Minister for Climate and the Environment on methods for testing the quality of liquefied gas (LPG)

The draft in question, based on standard PN-EN 589:2019-04, amends the Annex to the current Regulation as follows:

1. DIN 51619 was introduced to determine the composition of liquefied gas (LPG) by the method of physical separation of hydrocarbon components of LPG using gas chromatography, as an alternative to the current standard PN-EN 27941.
2. In the case of determination of the total content of diens, standard DIN 51619 was introduced for the method of determination, the materials used, the type of apparatus, the analytical procedure, the indication of the results of the analysis and the precision of the method, as an alternative to the current standard PN-EN 27941.
3. A method has been introduced to determine the total 1,3 butadiene content. The method of making the determination, the materials used, the type of apparatus, the analytical procedure, the administration of the results of the analysis and the precision of the method are determined by DIN 51619.
4. Methods have been introduced for the determination of propane content. The method of making the determination, the materials used, the type of apparatus, the analytical procedure, the administration of the results of the analysis and the precision of the method are determined by DIN 51619 or PN-EN 27941.
5. The use of the oxidative microculometry method based on ASTM D 3246 to determine the sulphur content in LPG has been withdrawn as inappropriate for the determination of sulphur at the level of 30 mg/kg. The use of the ultraviolet fluorescence method based on ASTM D 6667 is maintained and the possibility of using PN-EN 17178 is added at the same time.
6. The possibility of using a gas chromatography method with direct dosing of liquids to the column after evaporation at room temperature has been introduced to determine the evaporation residue. The method of making the determination, the reagents used, the type and preparation of the apparatus, the preparation of equipment, the test procedure, the calculation and presentation of the results and the precision of the method are determined by PN-EN 16423.
7. The part concerning the method used to determine the temperature in which the estimated relative vapour pressure is not less than 150 kPa is supplemented by the information that the hydrocarbon composition of the LPG sample is determined in accordance with PN-EN 27941 or DIN 51619. In addition, the possibility to use DIN 51619 together with Annex C of standard PN-EN 589 has been added to the procedure for the determination, calculation and presentation of results, accuracy, and the method of drawing up the test report.