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
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
18.3.1 Noise (except pulsating sound) in each space of the
platform shall be controlled within the limits specified in
18.3.2 Control station and office spaces
18.104.22.168 The noise in control rooms, offices and laboratory room
shall generally not exceed 60 dB(A).
22.214.171.124 Noise in radio room shall generally not exceed 50 dB(A)
18.3.3 Accommodation spaces
126.96.36.199 Noise in bedroom and medical room shall generally not
exceed 55 dB(A).
188.8.131.52 Noise in public spaces shall generally not exceed 60
184.108.40.206 Noise in dining room shall generally not exceed 60
220.127.116.11 Noise in service spaces shall generally not exceed 65
18.104.22.168 Noise in corridor shall not be more than 5 dB(A) as
compared with the adjacent rooms.
18.3.4 Machinery spaces
22.214.171.124 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
Sustaining operation 8 h, exceeding 91 dB(A).
Sustaining operation 1 h to 8 h, not exceeding 94
(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
126.96.36.199 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
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
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.