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ASTM F957-91(1996)

(Specification)

Standard Specification for Gong, Sound Signaling

Standard Specification for Gong, Sound Signaling

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

Status
Historical
Publication Date
14-Mar-1991
Technical Committee
F25 - Ships and Marine Technology
Drafting Committee
F25.07 - General Requirements
Current Stage
Ref Project

Relations

Replaced By
ASTM F957-91(2001) - Standard Specification for Gong, Sound Signaling
Effective Date
15-Mar-1991

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ASTM F957-91(1996) - Standard Specification for Gong, Sound SignalingASTM F957-91(1996) - Standard Specification for Gong, Sound Signaling
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ASTM F957-91(1996) - Standard Specification for Gong, Sound Signaling
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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: F 957 – 91 (Reapproved 1996) An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Gong, Sound Signaling
This standard is issued under the fixed designation F 957; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense. Consult the DoD Index of Specifications and
Standards for the specific year of issue which has been adopted by the Department of Defense.
1. Scope 4. Materials and Manufacture
1.1 This specification covers gongs for use on ships 100 m 4.1 Materials:
or more in length, as required by International Regulations (see 4.1.1 The gong cylinder, brackets, clapper rod, “U” bracket,
Appendix X1). washers, and clapper support pin shall be of stainless steel, in
1.2 For consistency with International Regulations, all mea- accordance with Specification A 167, UNS number S31600.
surements are in SI units. 4.1.2 The clapper mass shall be of cast alloy steel in
accordance with Specification A 276, UNS S31600.
2. Referenced Documents
4.1.3 The support bolt, nut, flat washer, and cotter pins shall
be of stainless steel compatible with the other materials.
2.1 ASTM Standards:
4.2 Welding:
A 167 Specification for Stainless and Heat-Resisting
4.2.1 Welding shall be of the type and sizes shown in Fig. 1
Chromium-Nickel Steel Plate, Sheet, and Strip
and Fig. 2, and in accordance with Standard AWS D1.1.
A 276 Specification for Stainless and Heat-Resisting Steel
4.3 Manufacture:
Bars and Shapes
4.3.1 Fig. 1 shows the general arrangement of the assembled
D 3951 Practice for Commercial Packaging
gong, as well as details of the gong cylinder. Fig. 2 shows
2.2 American Welding Society Standard:
5 details of the brackets, clapper, and miscellaneous fittings.
AWS D1.1 Structural Welding Code
6 4.3.2 The gong cylinder may be made from two pieces
2.3 Federal Specifications:
welded together, instead of one piece. Two piece construction
PPP-B-576 Box, Wood, Cleated, Veneer, Paper Overlaid
shall be annealed to remove residual stresses.
PPP-B-585 Boxes, Wood, Wirebound
4.3.3 Sharp corners and edges of the cylinder shall be
PPP-B-591 Boxes, Fiberboard, Wood-cleated
broken.
PPP-B-601 Boxes, Wood, Cleated Plywood
4.3.4 The two brackets shall be welded together before
PPP-B-621 Boxes, Wood, Nailed and Lock Corner
being welded to the cylinder. The flanged ends of the brackets
2.4 Military Standard:
may be left straight and not shaped to the cylinder.
MIL-STD-129 Marking for Shipment and Storage 4.3.5 The clapper mass shall be welded to the clapper rod
before forming the second eye.
3. Ordering Information 4.4 Extra Parts:
4.4.1 Two extra supporting nuts and flat washers shall be
3.1 Orders for gongs under this specification shall include
furnished with each gong.
the following information:
3.1.1 ASTM designation and year of issue.
5. Acoustic Requirements
3.1.2 Number of gongs.
5.1 The sound characteristics shall produce a sound pressure
3.1.3 Packaging and marking, if other than commercial.
level of not less than 110 dB at a distance of 1 m.
This specification is under the jurisdiction of ASTM Committee F-25 on
6. Dimensions and Tolerances
Shipbuilding and is the direct responsibility of Subcommittee F25.07 on General
6.1 Dimensions shall conform to Fig. 1 and Fig. 2.
Requirements.
Current edition approved March 15, 1991. Published August 1991. Originally
6.2 Tolerances shall be as follows:
published as F 957 – 85. Last previous edition F 957 – 87.
6.2.1 Up to 10 mm: 6 1 mm.
Annual Book of ASTM Standards, Vol 01.03.
3 6.2.2 10 mm to 50 mm: 6 2 mm.
Annual Book of ASTM Standards, Vol 01.05.
6.2.3 Over 50 mm: 6 3 mm.
Annual Book of ASTM Standards, Vol 15.09.
Available from the American Welding Society, 550 N. W. Le Jeune Rd., Miami,
FL 33126.
7. Workmanship, Finish, and Appearance
Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. 7.1 Gongs shall be free from cracks, burrs, sharp cutting
F 957
NOTE—All dimensions in millimetres.
FIG. 1 Assembly of Gong
edges, and other defects affecting their life, appearance, and separated into groups of 10 (or fraction thereof) for sampling
serviceability. purposes.
8. Sampling 9. Inspection and Testing
8.1 For orders of 1 or 2 gongs, each gong shall be inspected 9.1 Responsibility—Unless otherwise specified in the pur-
and tested. chase order, the manufacturer shall be responsible for the
8.2 For orders of 3 to 10 gongs, 2 gongs shall be selected at performance of all inspection and testing specified herein. The
random. If any one of them fails to meet requirements, then all manufacturer may utilize his own facilities or any commercial
gongs in the order shall be inspected and tested. facility acceptable to the purchaser. The purchaser reserves the
8.3 For orders of more than 10 gongs, they shall be right to perform any of the inspections and tests set forth where
F 957
NOTE—All dimensions in millimetres.
FIG. 2 Miscellaneous Details
such are deemed necessary to ensure that supplies conform to 10. Product Marking
prescribed requirements. Nonconforming gongs shall not be
10.1 The letters “ASTM” and this specification number
offered for delivery.
shall be engraved on the gong cylinder in figures at least 6 mm
9.2 Inspection—The dimensions of the gong and its com-
high.
ponents shall be checked to ensure that they are within
10.2 The manufacturer may engrave his brand name or logo
specified tolerances.
on the inside of the gong cylinder.
9.3 Acoustic Test—Each gong tested shall be supported as
11. Packaging and Package Marking
shown in Fig. 1 with the clapper in place. The gong shall be
rung by striking the cylinder with the clapper, activated by a 11.1 No preservation is required.
lanyard. The sound, produced in accordance with Appendix 11.2 Unless otherwise specified, packaging and marking
X1, shall be measured in a space with no large sound reflecting shall conform to Practice D 3951 and shall, when specified,
surfaces (except the floor) tha
...

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