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CHAPTER 18 ANTI

By Jane Lee,2014-12-20 16:52
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CHAPTER 18 ANTI

    CHAPTER 18 ANTI-POLLUTION AND NOISE

    AND VIBRATION CONTROL

18.1 General Regulations

    Anti-pollution measures of the platform shall comply with the related provisions of PRC “Law of the Maritime Environment Protection” and “Management Rules for Environmental Protection

    of Offshore Oil Exploration and Development” to protect offshore environment from pollution. Noise and vibration shall be controlled and the operating personnel on the platform shall be effectively protected from being affected by noise and vibration, according to the related requirements.

18.2 Anti-Pollution Requirements

    18.2.1 The platform shall be provided with anti-pollution

    facilities to treat the waste water and discard as well as

    to remove industrial refuses according to the related

    provisions of the Management Rules for Environmental

    Protection of Offshore Oil Exploration and

    Development.

    18.2.2 Discharge standard of industrial oily water

    The maximum allowable concentration of the treated oily

    water shall comply with the provisions of national

    standard CB4914-85 Industrial Oily Water Discharge

    Standard in Offshore Oil Development:

    That applicable to Class 1 standard sea area: monthly

    average 30 mg/L, one allowable value 45 mg/L.

    That applicable to Class 2 standard sea area: monthly

    average 50 mg/L, one allowable value 75 mg/L.

    18.2.3 Outfit of the sanitary sewage treatment equipment shall

    comply with the related provisions of the applied

    specification and standards.

18.3 Requirement of Noise Control

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    18.3.1 Noise (except pulsating sound) in each space of the

    platform shall be controlled within the limits specified in

    this Chapter.

18.3.2 Control station and office spaces

    18.3.2.1 The noise in control rooms, offices and laboratory room

    shall generally not exceed 60 dB(A).

    18.3.2.2 Noise in radio room shall generally not exceed 50 dB(A)

18.3.3 Accommodation spaces

    18.3.3.1 Noise in bedroom and medical room shall generally not

    exceed 55 dB(A).

    18.3.3.2 Noise in public spaces shall generally not exceed 60

    dB(A).

    18.3.3.3 Noise in dining room shall generally not exceed 60

    dB(A).

    18.3.3.4 Noise in service spaces shall generally not exceed 65

    dB(A).

    18.3.3.5 Noise in corridor shall not be more than 5 dB(A) as

    compared with the adjacent rooms.

18.3.4 Machinery spaces

18.3.4.1 Enclosed machinery spaces.

    (1) Noise control for enclosed machinery spaces shall

    take into account the conditions of the spaces and

    the sustained duration that the persons come into

    contact with the noise in the spaces. The noise in

    such spaces shall generally be confined to the

    following limiting values:

    Sustaining operation 12 h, not exceeding 88

    dB(A).

    Sustaining operation 8 h, exceeding 91 dB(A).

    Sustaining operation 1 h to 8 h, not exceeding 94

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    dD(A).

    (2) If the noise in enclosed machinery spaces exceeds

    the above limiting value, and the persons need to

    sustain operation in such spaces, a sound

    insulation watch-keeping room shall be provided

    with a noise value in the room 10 dB(A) lower than

    the corresponding limiting noise rate mentioned

    above 10 dB(A). Persons to work outside the

    sound insulation watch-keeping room shall be

    provided with protection device such as ear

    defender, etc.

    18.3.4.2 Open machinery spaces

    Open machinery spaces mean that the equipment is

    located in open spaces not enclosed around them. The

    noise value for such spaces shall not exceed 115 dB(A).

    18.4 Vibration control

    18.4.1 In laying out a platform, for the machinery equipment

    which are possible of inducing vibration to the structure

    the consideration shall be made to reduce and avoid the

    influence of vibration. If necessary, vibration reducing

    measures shall be taken for the equipment which can

    cause vibration.

    18.4.2 Accommodation space, control stations and offices may

    be provided, if necessary, with vibration-isolation

    measures to reduce and avoid the influence of extraneous

    vibration.

    18.4.3 The design ,manufacturing and installation of machinery

    system shall guarantee that any vibration modes under

    normal operating conditions will not cause any overstress

    inside the machinery.

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