BS EN ISO 6185-3:2018 ISO 6185‑3:2014


The samples shall be carefully examined at the end of the tests and shall not show any sign of external change of structure or of mechanical properties. Furthermore, 2 of the samples shall be cut open and shall not show any sign of internal change of structure.


Six of the samples shall be used for the water absorption test in 5.7.2.3, two of which shall be so tested after they have been subjected to the fuel resistance test in 5.7.2.4


The results shall state the mass in kilograms which each sample can support out of the water after one and seven days immersion (the selection of a test method suitable for obtaining this result directly or indirectly is left to the discretion of the testing body). The reduction of buoyancy shall not exceed 16% for samples which have been exposed to the diesel oil conditioning and shall not exceed 5% for all other samples. The samples shall show no sign of damage such as shrinking, cracking, swelling, dissolution or change of mechanical qualities.


5.7.2.2 Tests for stability under temperature cycling


Six samples shall be alternately subjected for 8 h to surrounding temperatures of −30 °C and +65 °C. These alternating cycles need not follow immediately after each other and the following procedure, repeated for a total of 10 cycles is acceptable:


a) store the samples for 8 h at +65 °C, to be completed on the first day; and


b) remove the samples from the warm chamber that same day and leave them exposed under ordinary room conditions until the next day; and


c) store the samples in a cold chamber for 8 h at −30 °C, to be completed the second day; and


d) remove the samples from the cold chamber that same day and leave them exposed under ordinary room conditions until the next day;


Repeat the procedure until 10 cycles (a,b,c,d) has been reached. 5.7.2.3 Tests for water absorption


The tests shall be carried out in fresh water and the sample shall be immersed for seven days under a 1,25m head of water. The tests shall be carried out on: a) 2 samples as supplied; and b) 2 samples which have been subjected to the temperature cycling as prescribed in 5.7.2.2; and


c) 6 samples which have been subjected to the temperature cycling as prescribed in 5.7.2.2 followed by the fuel resistance test prescribed in 5.7.2.4.


5.7.2.4 Fuel resistance test


The six samples to be tested shall be immersed horizontally for a period of 24 h under a 100mm head of the following fuels at ambient temperature: — 2 samples under any type of diesel fuel; — 2 samples under any type of petrol; — 2 samples under any type of biofuel.


After this test, the samples shall show no sign of damage such as shrinking, cracking, swelling, dissolution or change of mechanical qualities.


6 Functional components 8


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