Active Standard ASTM F957 | Developed by Subcommittee: F25.07
Book of Standards Volume: 01.07
Historical (view previous versions of standard)
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.
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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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A167 Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip
A276 Specification for Stainless Steel Bars and Shapes
D3951 Practice for Commercial Packaging
American Welding Society StandardAWSD1.1 Structural Welding Code
âFederal SpecificationsPPP-B-621 Boxes, Wood, Nailed and Lock Corner
Military StandardMIL-STD-129 Marking for Shipment and Storage
ICS Number Code 47.020.70 (Navigation and control equipment)