1 Noise standard
1.0.1 Noise control standard
GB 3096-82 Standard of environmental noise of urban area
GB 3222-82 Measurement method of environmental noise
GBJ 87-85 Specifications for the design of noise control system in industrial enterprises
HGJ 6-86 Provisions on engineering design of environmental protection of chemical industry projects
GBJ 122-88 Measurement of noise produced by industrial enterprises
GB 10070-88 Standard of environmental vibration in urban area
GB 10071-88 Measurement method of environmental vibration of urban area
GB 12348-90 Standard of noise at boundary of industrial enterprises
GB 12349-90 Method of measuring noise at boundary of industrial enterprises
HG 20503-92 Provisions on engineering design of noise control of chemical industry projects
1.0.2 Noise limits
See Table 1.0.2 for the noise limits at working area.
Table 1.0.2 Noise limits at working area
S.N. Location dB(A)
1 Production workshop and work place (where the workers are continuously exposed to noise for 8h everyday) 90
2 Duty room, observation room and resting room in the workshop exposed to high noise (indoor background noise level) No requirements for telephoning and communication 75
With requirements for telephoning and communication 70
3 Computer room at work places where precision assembly line and precision machining are located (normal work) 70
4 Office, lab and design room in workshop (indoor background noise level) 70
5 Main control room, centralized control room, communication room, telephone switchboard room, fire guard room (indoor background noise level) 60
6 Office, conference room, design room and central lab (including test, lab and measurement room) of the station headquarters (indoor background noise level) 60
7 Clinic, classroom, nursing room, nursery, worker's duty room (indoor background noise level) 55
The noise limits listed in the above table are taken from the national standard GBJ 87-85.
2 Noise control design principles and contents of process system discipline
2.0.1 Noise control design principle
2.0.1.1 For newly constructed, expanded and reconstructed projects, the allowable noise of each production device and workplace shall be specified and controlled in accordance with the relevant national, professional or regional standards based on the requirements for noise control in the design contract.
2.0.1.2 The noise generated in the production device shall be controlled from the sound source at first, that is, the low-noise device and equipment shall be adopted, and use low-noise process to replace the high-noise process. If the specified requirements and criteria are still not met after adopting the above measures, noise elimination, noise absorption, noise insulation, vibration isolation and comprehensive treatment measures shall be taken in the engineering design.
2.0.1.3 After the noise control measures are taken in the production workshops and for the posts, if the noise level still exceeds the requirements of relevant national and local standards, or some high-noise equipment does not require operators to stay near the equipment frequently. Operators working in these occasions may be equipped with ear protectors for personal protection.
2.0.1.4 The noise control design of process system discipline is to cooperate with the design manager and environmental protection discipline to understand the noise distribution as a whole, complete the noise control design specified by this discipline and provide the noise control design conditions and data to relevant disciplines. The work of process system discipline does not replace the noise control design tasks and responsibilities of environmental protection discipline and other relevant disciplines.
2.0.2 Noise control design contents
The noise control design of chemical plants shall be explained separately in environmental protection, labor safety and industrial hygiene. Environmental protection discipline is the leading discipline and centralized discipline to complete the noise control design. The process system discipline participates in the noise control design of chemical plants, focusing on the noise control and noise elimination design of the pipe system in the production device in the engineering design stage. The main contents are as follows:
2.0.2.1 Negotiate with relevant disciplines (process, equipment, pump, environmental protection, pipe, building, structure, automatic control, warm air, water supply and drainage, thermal engineering, industrial furnace, etc.), and select low-noise flows that meet the specified requirements, such as public material generation flows and equipment in chemical plants.
1 Noise standard
2 Noise control design principles and contents of process system discipline
3 Pipe system
4 Exhaust vent
5 Flare
6 Silencer
7 Acoustic shield
