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发表于 2008-5-13 16:27
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来自： 中国山东青岛
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截取一段DNV规范，证明是需要船检看的
C 300 Penetrations of bulkhead and decks
301 General
a) Penetrations of watertight bulkheads and decks shall be
carried out either with a separate gland for each cable, or
with boxes or pipes filled with a suitable flame retardant
packing or moulded material, in order to ensure the integrity
of the watertightness of the bulkhead or deck. The installation
shall be in accordance with the manufacturers'
installation instructions.
b) Fire rated penetrations shall be documented as required by
Pt.4 Ch.10 ((Rules for Classification of Ships)).
Guidance note:
Penetrations of watertight bulkheads should be placed as high as
practicable.
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302 Thermal insulation
Cable runs shall not be laid in or covered with thermal insulation
(e.g. through refrigerated cargo holds), but may cross
through such insulation.
303 Hot oil pipes near to penetrations
The distance from cable penetrations to flanges of steam or hot
oil pipes shall not be less than 300 mm for steam or hot oil
pipes with diameter D ≤ 75 mm, and not less than 450 mm for
larger pipes.
304 Chafing
Penetrations of bulkheads and decks shall be such that the cables
are not chafed. (Interpretation of SOLAS Ch. II-1/45.5.5)
305 Mechanical support of penetrations
The cable shall have mechanical fixing on both sides of a bulkhead
penetration.
C 400 Fire protection measures
401 General
The cable installation shall be protected against fire, fire
spreading, thermal, mechanical, corrosive and strain damage.
(Interpretation of SOLAS Ch. II-1/45.5.2)
402 Flammable materials
Cables shall not be installed in contact with flammable materials
such as wooden bulkheads, when the conductor temperature
exceeds 95°C at full load, at the actual ambient
temperature.
403 Precautions against fire spreading in cable bunches
Cables that are installed in bunches shall have been tested in
accordance with a recognised fire test for cables installed in
bunches, such as the test specified in IEC 60332-3, or be provided
with protection according to 404.
Guidance note:
A cable bunch in this context is defined as five or more cables
laid close together in trunks from machinery spaces and in spaces
with a high risk of fire, and more than 10 cables in other areas.
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404 Cable bunches not complying with IEC 60332-3 or other
recognised standard fire spread test.
a) Cable bunches, not complying with flame retardant properties
according to IEC 60332-3, shall be provided with
fire stops having at least class B-0 penetration properties
at the following locations:
— cable entries at the main and emergency switchboards
— where cables enter engine control rooms
— cable entries at centralised control panels for propulsion
machinery and essential auxiliaries
— at each end of totally enclosed cable trunks.
Additional fire stops need not be fitted inside totally enclosed
cable trunks.
b) In enclosed and semi-enclosed spaces, cable runs not complying
with flame retardant properties according to IEC
60332-3, shall be provided with fire stops having at least
B-0 penetrations:
— at every second deck or approximately 6 metres for
vertical runs
— at every 14 metres for horizontal.
Rules for Ships / High Speed, Light Craft and Naval Surface Craft, January 2008
Pt.4 Ch.8 Sec.10 – Page 67
DET NORSKE VERITAS
Alternatively, to additional fire stops, fire protective coating
may be applied to the cable bunch according to the following:
— to the entire length of vertical runs
— to at least 1 m in every 14 m for horizontal runs.
405 Fire resistance of penetrations
Where "A" or "B" class bulkheads or decks are penetrated for
the passage of electrical cables, arrangements shall be made to
ensure that the fire resistance of the bulkheads or decks, is not
impaired.
Guidance note:
Cable transits in "A", "B" or "F" class divisions should not have
more than 40% of the inside cross sectional area of the transit occupied
by cables. The installation should be in accordance with
the transit manufacturer's instructions.
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406 Fire resistant cables
For requirements for fire resistant cable, see Sec.2 J102.
这段是专门针对电缆管过舱件的
[ 本帖最后由 alphasen 于 2008-5-13 16:29 编辑 ] |
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