GB 8840-1988 Exhaust smoke limits for marine diesel engines

This standard specifies the permissible limits of exhaust smoke from marine diesel engines. GB 8840-1988 Limits of exhaust smoke from marine diesel engines GB8840-1988 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Limit for ex tust gas snoke of rarine diesel engine
Limit for ex tust gas snoke of rarine diesel engineThis standard specifies the permissible limit of exhaust smoke of marine diesel engines. Allowable limit
The measured value of exhaust smoke of marine diesel engines shall not exceed the permissible limit specified in the following table. Nominal exhaust flow shadow G
>55~65
>65~～75
>75~85
>85～95
>95~110
110～125
125~140
140~160
160~185
>185~210
>210～250||tt ||>250~290
Allowable limit
R (Bosch unit)
Nominal exhaust flow G
>290~350
>350~400
>400~500
>500~600
>600~700
>700~~900
>9001150
>1 150~1 500
>1500~2 000
>2 000~3000
>3 000~~5 000
>5 000-~7 000
The nominal exhaust flow rate of a naturally aspirated or supercharged diesel engine is calculated according to the following formulas (1) and (2):Two-stroke engine
Four-stroke enginebZxz.net
Wu Zhong: G
Nominal exhaust flow rate, L/s,
Total cylinder displacement, L
Engine speed when measuring smoke density, r/min. China State Shipbuilding Corporation 1988~01-27 approved 602
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UDC 621.436.06
GE8840-88
Allowable limit
(Boshu unit)
1988-10-01 implementation
Measurement conditions
GB884088
2.1 Diesel engines shall use the maximum continuous power conditions given in the manual or the power conditions specified in the order contract. 2.2 When the exhaust smoke density of a diesel engine is measured under partial power conditions according to the propulsion characteristics (main engine) or load characteristics (auxiliary engine), the speed and power of the actual measurement conditions must be indicated in the measurement report. At this time, the nominal exhaust flow rate should be calculated according to the actual measurement speed. 3 Test method
According to GB574185 "Measurement method for exhaust smoke of marine diesel engines". Additional remarks:
This standard is proposed by the Marine Diesel Engine Subcommittee of the National Technical Committee for Ship Standardization. This standard is drafted by Harbin Shipbuilding Engineering College, Shanghai Marine Diesel Engine Research Institute, and China State Shipbuilding Corporation Standardization Research Institute. 603
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