EN ISO 9093:2021 Small craft — Seacocks and through-hull fittings.
maximum load waterline
waterline of the craft when upright in the fully loaded ready-for-use ‘l.Dc condition
Note 1 to entry: The fully loaded ready-for use condition is defined in ISO 8666:2020, 7.3.
level of the water on the hull in the fully loaded ready-for-use mLDC condition when the craft is inclined to
— 7° for motor boats and sailing multihulls; or
— 300 or immersion of the sheerline, whichever occurs first, for monohull sailing boats
Note 1 to entry: The fully loaded ready-for use condition is defined in ISO 8666:2020. 7.3.
component used to connect a through-hull fitting or a seacock to an associated hose
4 Material requirements
Materials used for through-hull fittings. seacocks, hose connections and fittings located below the maximum load waterline shall be corrosion-resistant.
Materials used above the waterline shall he corrosion resistant or shall have protection against corrosion, taking into account the various and changing media that pass through the fitting (for example fresh, salt or brackish water with impurities; waste water from toilet systems or holding tanks).
Brass materials shall be dezincification resistant (DZR) when tested in accordance with ISO 6509-1:20 14 and assessed in accordance with ISO 6509-2:2012.
4.2 Material combinations
The combination of different materials including fastening elements shall take into consideration the
possibility of galvanic action.
Materials thatactgalvanically with others used in the system maybe used if theyaregalvanically isolated.
The combination or choice of non-metallic materials shall be made taking into account the possibility of swelling and/or seizure.
Materials in contact with each other shall not prevent the device and/or system from acting as intended.
Non-ferrous metals other than aluminium alloys shall not be used when aluminium is incorporated
in the system.
4.3 Resistance to deterioration/corrosion tests
All metallic components shall be corrosion resistant. The requirement for corrosion resistance shall be met through testing as per Annex B.
All non-metallic parts shall be stabilized against oxidation and UV. The requirement for UV stahilisation shall be met through testing as per Annex C.
EN ISO 9093 pdf download.