ASTM F957-91(2012)
(Specification)Standard Specification for Gong, Sound Signaling
Standard Specification for Gong, Sound Signaling
ABSTRACT
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.
SCOPE
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.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F957 −91 (Reapproved 2012) An American National Standard
Standard Specification for
Gong, Sound Signaling
ThisstandardisissuedunderthefixeddesignationF957;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 3. Ordering Information
1.1 This specification covers gongs for use on ships 100 m
3.1 Orders for gongs under this specification shall include
ormoreinlength,asrequiredbyInternationalRegulations(see the following information:
Appendix X1).
3.1.1 ASTM designation and year of issue.
3.1.2 Number of gongs.
1.2 For consistency with International Regulations, all mea-
3.1.3 Packaging and marking, if other than commercial.
surements are in SI units.
1.3 This international standard was developed in accor-
4. Materials and Manufacture
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 4.1 Materials:
Development of International Standards, Guides and Recom-
4.1.1 The gong cylinder, brackets, clapper rod, “U” bracket,
mendations issued by the World Trade Organization Technical washers, and clapper support pin shall be of stainless steel, in
Barriers to Trade (TBT) Committee.
accordance with Specification A167, UNS number S31600.
4.1.2 The clapper mass shall be of cast alloy steel in
2. Referenced Documents
accordance with Specification A276, UNS S31600.
2.1 ASTM Standards: 4.1.3 The support bolt, nut, flat washer, and cotter pins shall
A167 Specification for Stainless and Heat-Resisting be of stainless steel compatible with the other materials.
Chromium-Nickel Steel Plate, Sheet, and Strip
4.2 Welding:
A276 Specification for Stainless Steel Bars and Shapes
4.2.1 Welding shall be of the type and sizes shown in Fig. 1
D3951 Practice for Commercial Packaging
and Fig. 2, and in accordance with Standard AWS D1.1.
2.2 American Welding Society Standard:
4.3 Manufacture:
AWS D1.1 Structural Welding Code
4.3.1 Fig.1showsthegeneralarrangementoftheassembled
2.3 Federal Specifications:
gong, as well as details of the gong cylinder. Fig. 2 shows
PPP-B-576 Box, Wood, Cleated, Veneer, Paper Overlaid
details of the brackets, clapper, and miscellaneous fittings.
PPP-B-585 Boxes, Wood, Wirebound
4.3.2 The gong cylinder may be made from two pieces
PPP-B-591 Boxes, Fiberboard, Wood-cleated
welded together, instead of one piece. Two piece construction
PPP-B-601 Boxes, Wood, Cleated Plywood
shall be annealed to remove residual stresses.
PPP-B-621 Boxes, Wood, Nailed and Lock Corner
4.3.3 Sharp corners and edges of the cylinder shall be
2.4 Military Standard:
broken.
MIL-STD-129 Marking for Shipment and Storage
4.3.4 The two brackets shall be welded together before
being welded to the cylinder. The flanged ends of the brackets
This specification is under the jurisdiction of ASTM Committee F25 on Ships
may be left straight and not shaped to the cylinder.
and Marine Technology and is the direct responsibility of Subcommittee F25.07 on
4.3.5 The clapper mass shall be welded to the clapper rod
General Requirements.
Current edition approved May 1, 2012. Published May 2012. Originally before forming the second eye.
approved in 1985. Last previous edition approved in 2001 as F957 – 91 (2006).
4.4 Extra Parts:
DOI: 10.1520/F0957-91R12.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.4.1 Two extra supporting nuts and flat washers shall be
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
furnished with each gong.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Available from American Welding Society (AWS), 8669 NW 36 St., #130, 5. Acoustic Requirements
Miami, FL 33166-6672, http://www.aws.org.
5.1 Thesoundcharacteristicsshallproduceasoundpressure
Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,
Philadelphia, PA 19111-5094, http://quicksearch.dla.mil. level of not less than 110 dB at a distance of 1 m.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F957−91 (2012)
NOTE 1—All dimensions in millimetres.
FIG. 1 Assembly of Gong
6. Dimensions and Tolerances 6.2.3 Over 50 mm: 63 mm.
6.1 Dimensions shall conform to Fig. 1 and Fig. 2.
6.2 Tolerances shall be as follows:
6.2.1 Up to 10 mm: 61 mm.
6.2.2 10 mm to 50 mm: 62 mm.
F957−91 (2012)
NOTE 1—All dimensions in millimetres.
FIG. 2 Miscellaneous Details
7. Workmanship, Finish, and Appearance 8.3 For orders of more than 10 gongs, they shall be
separated into groups of 10 (or fraction thereof) for sampling
7.1 Gongs shall be free from cracks, burrs, sharp cutting
purposes.
edges, and other defects affecting their life, appearance, and
serviceability.
9. Inspection and Testing
8. Sampling
9.1 Responsibility—Unless otherwise specified in the pur-
8.1 For orders of 1 or 2 gongs, each gong shall be inspected
chase order, the manufacturer shall be responsible for the
and tested.
performance of all inspection and testing specified herein. The
manufacturer may utilize his own facilities or any commercial
8.2 For orders of 3 to 10 gongs, 2 gongs shall be selected at
facility acceptable to the purchaser. The purchaser reserves the
random. If any one of them fails to meet requirements, then all
gongs in the order shall be inspected and tested. righttoperformanyoftheinspectionsandtestssetforthwhere
F957−91 (2012)
such are deemed necessary to ensure that supplies conform to 11. Packaging and Package Marking
prescribed requirements. Nonconforming gongs shall not be
11.1 No preservation is required.
offered for delivery.
11.2 Unless otherwise specified, packaging and marking
9.2 Inspection—The dimensions of the gong and its com-
shall conform to Practice D3951 and shall, when specified,
ponents shall be checked to ensure that they are within
include bar code marking.
specified tolerances.
11.3 For government procurements for long-term storage or
9.3 Acoustic Test—Each gong tested shall be supported as
overseas shipment, the requirements of Annex A1 apply. In
shown in Fig. 1 with the clapper in place. The gong shall be
such case the required level of packaging shall be specified.
rung by striking the cylinder with the clapper, activated by a
lanyard. The sound, produced in accordance with Appendix
12. Supersession
X1, shall be measured in a space with no large sound reflecting
surfaces(exceptthefloor)thatarewithin10m.Thesoundshall
12.1 This specification is intended
...
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