BS EN ISO 6185-3:2018 ISO 6185‑3:2014
Table 5— Minimum number of compartments in buoyancy tube
Maximum motor power rating
kW 15 to 45 > 45 NOTE The dimensional factor F(d) is determined by LH × BH
The volume of each compartment (Vc), with internal partition bulkheads in the neutral position, shall be within ± 20% of the mean compartment volume expressed as the total volume of the buoyancy tube (VT) divided by the number of buoyancy compartments (N).
Ancillary inflatable compartments that are not permanently fixed to the hull (see 3.3) shall not be included in the above calculation.
Compartments in addition to the minimum requirement may be smaller than those required by the above paragraph.
7.6 Nominal pressures (inflatable buoyancy tubes)
The nominal pressures shall be specified for each compartment of the fully inflated boat. These pressures shall be indicated in the owner's manual (see Clause 9) and on the builders plate (see Clause 8).
In order that the user can ascertain that the nominal pressure has been reached, the manufacturer shall provide appropriate equipment or a pressure gauge for this purpose. Alternatively, instructions shall be included in the owner's manual (see Clause 9) which will enable a sufficiently close estimate to be made.
The nominal pressure shall be consistently expressed in Pascal with bars and pounds per square inch as additional optional units.
As an additional safety measure, the nominal pressures should be indicated on each compartment. 7.7 Strength of the inflatable buoyancy tube 7.7.1 Requirement
The inflatable parts shall remain airtight after each of the tests described in 7.7.2. If the drop test in 8.2 is not conducted, then the tube attachment shall be tested in accordance with 7.4 in ISO 6185-4:2011.
7.7.2 Test method
7.7.2.1 Test temperature All tests shall be performed at a temperature of 20 °C ± 3 °C, unless specified otherwise. 7.7.2.2 Heat test (all boats types)
Assemble the inflatable parts and inflate to a pressure of 1,2 times the nominal pressure. Place the inflatable parts in a heat chamber, set at 60 °C, for a period of 6 h. On completion of the test period, remove the inflatable parts from the heat chamber and allow to cool down to ambient temperature. Test the airtightness of the inflatable parts in accordance with the test specified in 7.7.2.4.
© ISO 2014 – All rights reserved 17
≤ 8 > 8 ≤ 8 > 8
3 4 4 5
Dimensional factor F(d)
Minimum Number of buoyant compartments (N)
Distributed through RYA Online Standards Access under Licence No: 2020ET0001 © BSI
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