GB8840-2009
Limit for exhaust smoke of marine diesel engine
船用柴油机排气烟度限值
GB 8840-2009 is a current mandatory Chinese national standard for Limit for exhaust smoke of marine diesel engine. It appears in the Auto compliance cluster with a environmental protection focus and has an implementation date of Aug 1, 2009.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard is specifically applicable to the limitation of exhaust smoke generated by marine diesel engines operating under steady-state conditions. It is mandatory for all manufacturers producing marine diesel engines for Chinese compliance. The standard focuses exclusively on steady-state operations and does not cover partial load conditions or transient operations.
Technical requirements
The standard establishes the maximum allowable exhaust smoke limits based on the engine's nominal exhaust flow rate. The smoke opacity is measured and expressed in filter paper smoke numbers (SF_), replacing the previous Bosch smoke unit methodology. The measurement must be conducted at the engine's rated operating condition as specified on the nameplate, or at the continuous operating power defined in the purchase contract. Engines must not exceed the specified smoke limits corresponding to their nominal exhaust flow rate. For determining the nominal exhaust flow rate, the standard provides specific calculation formulas that vary depending on whether the engine is a two-stroke or four-stroke diesel engine. These calculations utilize the total cylinder displacement and the engine speed at the time of measurement.
Testing methods
Exhaust smoke measurement procedures must be conducted in accordance with the referenced standard GB/T 5741, which outlines the methodologies for measuring marine diesel engine exhaust smoke. The evaluation focuses on the steady-state rated power or continuous power condition to determine compliance with the smoke opacity limits.
FAQs
What products are regulated under GB 8840-2009?
The standard applies to the limitation of exhaust smoke from marine diesel engines operating under steady-state conditions.
Are there any updates from the previous version of GB 8840-2009?
The 2009 version changed the smoke value representation from Bosch smoke units to filter paper smoke numbers, updated the allowable limit values accordingly, and removed the measurement requirements for partial load conditions.
Is compliance with GB 8840-2009 mandatory for marine diesel engines?
Yes, the standard is mandatory. All technical content within GB 8840-2009 is established as mandatory for the applicable marine diesel engines.
The summary above provides a high-level overview of GB 8840-2009. To ensure complete compliance for your marine engines entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 8840-2009 today to access all detailed parameter tables, calculation formulas, and testing procedures.
Applicability hints
- Type
- Environmental protection
- CCS
- U44
- ICS
- 47.020.20
- Competent department
- Ministry of Ecology and Environment
- Technical committee
- Ministry of Ecology and Environment
Relationships
Replaces:GB 8840-1988