ASTM F957-91(2001)

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
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.07 - General Requirements

Relations

• Replaces: ASTM F957-91(1996) - Standard Specification for Gong, Sound Signaling
• Effective Date: 15-Mar-1991
• Replaced By: ASTM F957-91(2006) - Standard Specification for Gong, Sound Signaling
• Effective Date: 01-Dec-2006

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
Designation: F 957 – 91 (Reapproved 2001)
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.
1. Scope 4. Materials and Manufacture
1.1 This specification covers gongs for use on ships 100 m 4.1 Materials:
ormoreinlength,asrequiredbyInternationalRegulations(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
2.1 ASTM Standards:
be of stainless steel compatible with the other materials.
A 167 Specification for Stainless and Heat-Resisting 4.2 Welding:
Chromium-Nickel Steel Plate, Sheet, and Strip
4.2.1 Welding shall be of the type and sizes shown in Fig. 1
A 276 Specification for Stainless Steel Bars and Shapes and Fig. 2, and in accordance with Standard AWS D1.1.
D 3951 Practice for Commercial Packaging
4.3 Manufacture:
2.2 American Welding Society Standard: 4.3.1 Fig.1showsthegeneralarrangementoftheassembled
AWS D1.1 Structural Welding Code
gong, as well as details of the gong cylinder. Fig. 2 shows
2.3 Federal Specifications: details of the brackets, clapper, and miscellaneous fittings.
PPP-B-576 Box, Wood, Cleated, Veneer, Paper Overlaid
4.3.2 The gong cylinder may be made from two pieces
PPP-B-585 Boxes, Wood, Wirebound welded together, instead of one piece. Two piece construction
PPP-B-591 Boxes, Fiberboard, Wood-cleated
shall be annealed to remove residual stresses.
PPP-B-601 Boxes, Wood, Cleated Plywood
4.3.3 Sharp corners and edges of the cylinder shall be
PPP-B-621 Boxes, Wood, Nailed and Lock Corner broken.
2.4 Military Standard:
4.3.4 The two brackets shall be welded together before
MIL-STD-129 Marking for Shipment and Storage being welded to the cylinder. The flanged ends of the brackets
may be left straight and not shaped to the cylinder.
3. Ordering Information
4.3.5 The clapper mass shall be welded to the clapper rod
3.1 Orders for gongs under this specification shall include
before forming the second eye.
the following information:
4.4 Extra Parts:
3.1.1 ASTM designation and year of issue.
4.4.1 Two extra supporting nuts and flat washers shall be
3.1.2 Number of gongs.
furnished with each gong.
3.1.3 Packaging and marking, if other than commercial.
5. Acoustic Requirements
5.1 Thesoundcharacteristicsshallproduceasoundpressure
This specification is under the jurisdiction of ASTM Committee F25 on
level of not less than 110 dB at a distance of 1 m.
Shipbuilding and is the direct responsibility of Subcommittee F25.07 on General
Requirements.
6. Dimensions and Tolerances
Current edition approved March 15, 1991. Published August 1991. Originally
published as F 957 – 85. Last previous edition F 957 – 87.
6.1 Dimensions shall conform to Fig. 1 and Fig. 2.
Annual Book of ASTM Standards, Vol 01.03.
6.2 Tolerances shall be as follows:
Annual Book of ASTM Standards, Vol 15.09.
6.2.1 Up to 10 mm: 6 1 mm.
Available from theAmericanWelding Society, 550 N.W. Le Jeune Rd., Miami,
FL 33126. 6.2.2 10 mm to 50 mm: 6 2 mm.
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
6.2.3 Over 50 mm: 6 3 mm.
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F 957
NOTE—All dimensions in millimetres.
FIG. 1 Assembly of Gong
7. Workmanship, Finish, and Appearance 8. Sampling
7.1 Gongs shall be free from cracks, burrs, sharp cutting
8.1 For orders of 1 or 2 gongs, each gong shall be inspected
edges, and other defects affecting their life, appearance, and
and tested.
serviceability.
F 957
NOTE—All dimensions in millimetres.
FIG. 2 Miscellaneous Details
8.2 For orders of 3 to 10 gongs, 2 gongs shall be selected at righttoperformanyoftheinspectionsandtestssetforthwhere
random. If any one of them fails to meet requirements, then all such are deemed necessary to ensure that supplies conform to
gongs in the order shall be inspected and tested. prescribed requirements. Nonconforming gongs shall not be
8.3 For orders of more than 10 gongs, they shall be offered for delivery.
separated into groups of 10 (or fraction thereof) for sampling 9.2 Inspection—The dimensions of the gong and its com-
purposes. ponents shall be checked to ensure that they are within
specified tolerances.
9. Inspection and Testing
9.3 Acoustic Test—Each gong tested shall be supported as
9.1 Responsibility—Unless otherwise specified in the pur- shown in Fig. 1 with the clapper in place. The gong shall be
chase order, the manufacturer shall be responsible for the rung by striking the cylinder with the clapper, activated by a
performance of all inspection and testing specified herein. The lanyard. The sound, produced in accordance with Appendix
manufacturer may utilize his own facilities or any commercial X1, shall be measured in a space with no large sound reflecting
facility acceptable to the purchaser. The purchaser reserves the surfaces(exceptthefloor)thatarewithin10m.Thesoundshall
F 957
be measured using a commercial sound level meter located at 11.3 For government procurements for long-term storage or
a distance of 1 m and at a height above the floor equal to that overseas shipment, the requirements of Annex A1 apply. In
of the striking point. such case the required level of packaging shall be specified.
10. Product Marking
12. Supersession
10.1 The letters “ASTM” and this specification number
12.1 This specification is intended to supersede Bureau of
shall be engraved on the gong cylinder in figures at least 6 mm
Ships drawing S2408-F-921899.The cancellation of Bureau of
high.
Ship
...