BS EN ISO 9093:2021 pdf download

BS EN ISO 9093:2021 pdf download.Small craft-Seacocks and through-hull fittings.
BS EN ISO 9093 specifies requirements for through-hull fittings, seacocks, hose connections, their fittings and their installation in small craft with a length of hull, LH, as defined in ISO 8666:2020. of up to 24 rn.
BS EN ISO 9093 is not applicable to engine and heater exhaust fittings, and sail drive through-hull fittings.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4892-3:2016, Plastics — Methods of exposure to laboratory light sources — Part 3: Fluorescent UViamps ISO 6509-1:2014, Corrosion of metals and alloys — Determination of dezincification resistance of copper alloys with zinc — Part 1: Test method
ISO 6509-2:2017, Corrosion of metals and alloys — Determination of dezincification resistance of copper
shut-off device intended to prevent the ingress of water, normally directly fitted to a hull or a through-hull fitting
capable of being reached for inspection, removal or maintenance without removal of permanent craft structure
readily accessible
capable of being reached quickly and safely for effective use under emergency conditions without the use of tools
5.2 General design requirements
The through-hull fitting shall present a secure and watertight connection that cannot be dislodged by
outside forces due to operation of the fitting and components attached to it, e.g. a seacock.
5.3 Detailed design requirements
5.3.1 Stem
The stem length shall be sized considering the varying hull thicknesses, depending on the hull material and construction.
After installation, the minimum remaining thread length shall be at least 1,5 times the minimum thread length specified in Table 2.
The wall thickness of the stem shall ensure that the remaining strength after machining is adequate for the torque applied during installation and the use of the fitting.
Table 2 — Through-hull fitting minimum thread lengths
6.1 General
The seacock shall be designed to permit:
— operation under any condition likely to be encountered under normal service conditions;
— a visual check of the open and closed position.
The length of the handle and the clear distance between handle and intake and discharge line shall be sufficient to allow for easy operation.
The design of the seacock shall ensure that no part can come loose under normal service conditions.
6.2 Thread length requirements
The seacock assembly shall have a minimum threaded length for attachment to through-hull fittings (see Table 2 and Figure 1).BS-EN-ISO-9093-2021

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