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Historical Revision

ASTM F957-91(2012)

Standard Specification for Gong, Sound Signaling
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This specification covers gongs for use on ships of certain length, as required by International Regulations. The gong cylinder, brackets, clapper rod, "U" bracket, washers, and clapper support pin shall be made of stainless steel. The clapper mass shall be made of cast alloy steel. In addition, the support bolt, nut, flat washer, and cotter pins shall be made of stainless steel compatible with the other materials. The general arrangement of the assembled gong, as well as details of the gong cylinder, brackets, clapper, and miscellaneous fittings are presented. The sound characteristics of these gongs shall be determined by an acoustic test. These gongs shall be free from cracks, burrs, sharp cutting edges, and other defects affecting their life, appearance, and serviceability.

1.1 This specification covers gongs for use on ships 100 m or more in length, as required by International Regulations (see Appendix X1).

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

SDO ASTM: ASTM International
Document Number F957
Publication Date May 1, 2012
Language en - English
Page Count 5
Revision Level 91(2012)
Supercedes
Committee F25.07
Publish Date Document Id Type View
May 1, 2023 F0957-91R23 Revision
Oct. 1, 2018 F0957-91R18 Revision
May 1, 2012 F0957-91R12 Revision
Dec. 1, 2006 F0957-91R06 Revision
March 15, 1991 F0957-91R01 Revision
March 15, 1991 F0957-91R96 Revision