ASTM F956-91(2012)

Standard Specification for Bell, Cast, Sound Signalling

ABSTRACT
This specification covers cast sound-signalling bells, together with bulkhead mounting plates for the smaller bells, for use on ships, boats, and other marine craft, for compliance with the rules in the convention on the International Regulations for Preventing Collisions at Sea. Bell bodies, clappers, and other cast fittings and parts shall be copper alloy. Fittings such as bolts, nuts, washers, pins, and supporting lugs shall be of copper alloy compatible with the bell castings. Bells shall have full, clear, round, and farreaching tones. The sound pressure level shall not be less than 110 dB at a distance of 1 m from it. Acoustic tests shall be conducted only for the 200 mm heavy and larger bells to check the requirements prescribed.
SCOPE
1.1 This specification covers cast sound-signalling bells, together with bulkhead mounting plates for the smaller bells, for use on ships, boats, and other marine craft, for compliance with the rules in the convention on the International Regulations for Preventing Collisions at Sea (commonly called Colregs). See Appendix X1.  
1.2 Bells and bulkhead mounting plate shall be sized as indicated in Section 4 (see Appendix X2).  
1.3 For consistency with International Regulations, all measurements are in SI units.

General Information

• Status: Historical
• Publication Date: 30-Apr-2012
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.07 - General Requirements

Relations

• Replaces: ASTM F956-91(2006) - Standard Specification for Bell, Cast, Sound Signalling
• Effective Date: 01-May-2012

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:F956 −91 (Reapproved 2012) An American National Standard
Standard Specification for
1
Bell, Cast, Sound Signalling
ThisstandardisissuedunderthefixeddesignationF956;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.
1. Scope 4.1.1 150 mm,
4.1.2 200 mm (2.2 kg),
1.1 This specification covers cast sound-signalling bells,
4.1.3 200 mm (4.5 kg),
together with bulkhead mounting plates for the smaller bells,
for use on ships, boats, and other marine craft, for compliance
4.1.4 250 mm,
with the rules in the convention on the International Regula-
4.1.5 300 mm,
tions for Preventing Collisions at Sea (commonly called
4.1.6 360 mm,
2
Colregs). See Appendix X1.
4.1.7 400 mm, and
1.2 Bells and bulkhead mounting plate shall be sized as
4.1.8 550 mm.
indicated in Section 4 (see Appendix X2).
4.2 Bulkhead mounting plates shall be furnished for the
1.3 For consistency with International Regulations, all mea-
following bell sizes:
surements are in SI units.
4.2.1 150 mm, and
4.2.2 200 mm.
2. Referenced Documents
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2.1 ASTM Standards:
5. Ordering Information
B584 Specification for Copper Alloy Sand Castings for
5.1 Orders for materials under this specification shall in-
General Applications
2
2.2 Other Documents: clude the following information:
CFR 33 Part 81–72 Implementing Rules
5.1.1 ASTM designation and year of issue.
CFR 33 Part 86, Subpart B, Bell or Gong
5.1.2 Number of bells.
5.1.3 Size of bell(s) (see
4.1).
3. Terminology
5.1.4 Additional bulkhead mounting plates (see 4.2 and
3.1 Definitions:
6.2.2).
3.1.1 bell, n—a hollow metal instrument that rings when
5.1.5 Inscription required (see 12.1).
struck.
5.1.6 Packaging, if other than commercial (see Section13 ).
3.1.2 cast, v—to form by molding in a hollow form for
shaping a liquid or plastic substance.
6. Materials and Manufacture
3.1.3 clapper, n—hammer like object inside a bell.
6.1 Material:
4. Classification
6.1.1 Bell bodies, clappers, and other cast fittings and parts
shall be copper alloy conforming to Specification B584, UNS
4.1 Bells shall be furnished in the following sizes, based on
C87200.
bellmouth diameter in millimetres (see Appendix X2):
6.1.2 Fittings such as bolts, nuts, washers, pins, and sup-
porting lugs shall be of copper alloy compatible with the bell
1
This specification is under the jurisdiction of ASTM Committee F25 on Ships
castings.
and Marine Technology and is the direct responsibility of Subcommittee F25.07 on
General Requirements.
6.2 Manufacture:
Current edition approved May 1, 2012. Published May 2012. Originally
approved in 1986. Last previous edition approved in 2006 as F956 – 91 (2006). 6.2.1 ConstructionshallbeinaccordancewithFig.1,Fig.2,
DOI: 10.1520/F0956-91R12.
and Fig. 3.
2
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
6.2.2 For Fig. 1 and Fig. 2, one bulkhead mounting plate
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
www.dodssp.daps.mil. shall be furnished with each bell, however, additional mount-
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ing plates may be ordered.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.2.3 For all bells, two extra supporting nuts, washers, and
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. acorn nuts (where used) shall be furnished.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F956−91 (2012)
Mass and Dimensions of Bells
Dimensions, mm
Bell Size, Bell Mass,
AB NOTE 1—All dimensions in millimetres.
mm kg
Tolerances:
150 1.4 150 105
Up to 125 mm: 62mm
200 2.2 200 133
Over 125 mm: 63mm
200 4.5 200 152
Mass of bell: 9 6 0.45 kg.
Mass of Clapper: 0.5 6 0.05 kg.
NOTE 1—All dimensions in millimetres.
FIG. 2Size 250
Tolerances:
Up to 150 mm: 62mm
Over 150 mm: 63mm
Mass of Bell: 60.2 kg (60.3 kg for 4.5 kg bell). 10.2 For orders for 3 to 10 bells of the same size, 2 bells
Mass of Clapper: No less than 3 % of bell mass.
shallbeselectedatrandom.Ifanyoneofthemfailstomeetthe
FIG. 1Sizes 150 and 200
requirements, then all bells in the order shall be inspected and
tested.
10.3 For orders for more than 10 bells of the same size.
They shall be separated into groups of 10 (or fraction thereof)
7. Acoustic Requirements
for sampling purposes.
7.1 Bells shall have full, clear, round, and far reaching
11. Inspection and Testing
tones.The sound pressure level shall not be less than 110 dB at
a distance of 1 m from it.
11.1 Responsibility—Unless
...