ASTM F956 - 91(2018)

    Standard Specification for Bell, Cast, Sound Signalling

    Active Standard ASTM F956 | Developed by Subcommittee: F25.07

    Book of Standards Volume: 01.07


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    Abstract

    This specification covers cast sound-signalling bells, together with bulkhead mounting plates for the smaller bells, for use on ships, boats, and other marine craft, for compliance with the rules in the convention on the International Regulations for Preventing Collisions at Sea. Bell bodies, clappers, and other cast fittings and parts shall be copper alloy. Fittings such as bolts, nuts, washers, pins, and supporting lugs shall be of copper alloy compatible with the bell castings. Bells shall have full, clear, round, and farreaching tones. The sound pressure level shall not be less than 110 dB at a distance of 1 m from it. Acoustic tests shall be conducted only for the 200 mm heavy and larger bells to check the requirements prescribed.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification covers cast sound-signalling bells, together with bulkhead mounting plates for the smaller bells, for use on ships, boats, and other marine craft, for compliance with the rules in the convention on the International Regulations for Preventing Collisions at Sea (commonly called Colregs).2 See Appendix X1.

    1.2 Bells and bulkhead mounting plate shall be sized as indicated in Section 4 (see Appendix X2).

    1.3 For consistency with International Regulations, all measurements are in SI units.

    1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    Other Documents

    CFR33

    CFR33 Part 8172 Implementing Rules

    ASTM Standards

    B584 Specification for Copper Alloy Sand Castings for General Applications


    ICS Code

    ICS Number Code 47.020.70 (Navigation and control equipment)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/F0956-91R18

    Citation Format

    ASTM F956-91(2018), Standard Specification for Bell, Cast, Sound Signalling, ASTM International, West Conshohocken, PA, 2018, www.astm.org

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