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ASTM F956-91(2012)
Standard Specification for Bell, Cast, Sound Signalling
5 стр.
Заменен
Электронный (pdf)Печатное издание
96.72 $ (включая НДС 20%)
Разработчик:
Зарубежные/ASTM
ICS:
47.020.70 Navigation and control equipment / Навигационное оборудование и приборы управления
Сборник (ASTM):
01.07 Ships and Marine Technology (I): F670 – F1511 / Судоходные и Морские Технологии (I): F670 – F1511
Тематика:
Steel--Structural, Tubes, Plate, Coated
Описание
Реферат

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.

Область применения

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.

Ключевые слова:
bell; bell casting; clapper; sound pressure level; sound signalling; Shipbuilding materials (general)--specifications; Bells