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ASTM F957-91(2006)

(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

Status
Historical
Publication Date
30-Nov-2006
ICS
47.020.70 - Navigation and control equipment
Technical Committee
F25 - Ships and Marine Technology
Drafting Committee
F25.07 - General Requirements
Current Stage
Ref Project

Relations

Replaces
ASTM F957-91(2001) - Standard Specification for Gong, Sound Signaling
Effective Date
01-Dec-2006
Replaced By
ASTM F957-91(2012) - Standard Specification for Gong, Sound Signaling
Effective Date
01-May-2012

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ASTM F957-91(2006) - Standard Specification for Gong, Sound SignalingASTM F957-91(2006) - Standard Specification for Gong, Sound Signaling
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ASTM F957-91(2006) - Standard Specification for Gong, Sound Signaling
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F957 – 91 (Reapproved 2006)
Standard Specification for
1
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 Department of Defense.
1. Scope 3.1.3 Packaging and marking, if other than commercial.
1.1 This specification covers gongs for use on ships 100 m
4. Materials and Manufacture
ormoreinlength,asrequiredbyInternationalRegulations(see
4.1 Materials:
Appendix X1).
4.1.1 The gong cylinder, brackets, clapper rod, “U” bracket,
1.2 For consistency with International Regulations, all mea-
washers, and clapper support pin shall be of stainless steel, in
surements are in SI units.
accordance with Specification A167, UNS number S31600.
2. Referenced Documents 4.1.2 The clapper mass shall be of cast alloy steel in
2 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
3
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
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 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
3. Ordering Information
being welded to the cylinder. The flanged ends of the brackets
may be left straight and not shaped to the cylinder.
3.1 Orders for gongs under this specification shall include
4.3.5 The clapper mass shall be welded to the clapper rod
the following information:
before forming the second eye.
3.1.1 ASTM designation and year of issue.
4.4 Extra Parts:
3.1.2 Number of gongs.
4.4.1 Two extra supporting nuts and flat washers shall be
furnished with each gong.
1
This specification is under the jurisdiction of ASTM Committee F25 on Ships
and Marine Technology and is the direct responsibility of Subcommittee F25.07 on
5. Acoustic Requirements
General Requirements.
5.1 Thesoundcharacteristicsshallproduceasoundpressure
Current edition approved Dec. 1, 2006. Published January 2007. Originally
approved in 1985. Last previous edition approved in 2001 as F957 – 91 (2001).
level of not less than 110 dB at a distance of 1 m.
DOI: 10.1520/F0957-91R06.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6. Dimensions and Tolerances
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1 Dimensions shall conform to Fig. 1 and Fig. 2.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
6.2 Tolerances shall be as follows:
3
Available from American Welding Society (AWS), 550 NW LeJeune Rd.,
6.2.1 Up to 10 mm: 61 mm.
Miami, FL 33126, http://www.aws.org.
4 6.2.2 10 mm to 50 mm: 62 mm.
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
www.dodssp.daps.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
F957 – 91 (2006)
NOTE—All dimensions in millimetres.
FIG. 1 Assembly of Gong
6.2.3 Over 50 mm: 63 mm. 8.2 For orders of 3 to 10 gongs, 2 gongs shall be selected at
random. If any one of them fails to meet requirements, then all
7. Workmanship, Finish, and Appearance
gongs in the order shall be inspected and tested.
7.1 Gongs shall be free from cracks, burrs, sharp cutting 8.3 For orders of more than 10 gongs, they shall be
edges, and other defects affecting their life, appearance, and
separated into groups of 10 (or
...

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