GB8840-2009

Limit for exhaust smoke of marine diesel engine

船用柴油机排气烟度限值

GB 8840-2009 est une norme nationale chinoise obligatoire en vigueur : Limit for exhaust smoke of marine diesel engine. Secteur : Automobile. Thème principal : Protection de l’environnement. Entrée en vigueur : 1 août 2009.

L’applicabilité dépend du périmètre du produit, de la voie de certification, des avis des autorités et des règles de transition. Demandez une traduction ou vérifiez la source avant d’utiliser cette fiche pour une décision de conformité.

Aperçu de conformité

Cet aperçu n’est actuellement disponible qu’en anglais.

Champ d’application

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.

Exigences techniques

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.

Méthodes d’essai

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.

Questions fréquentes

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.

Indications d’applicabilité

Type: Protection de l’environnement
CCS: U44
ICS: 47.020.20
Autorité compétente: Ministry of Ecology and Environment
Comité technique: Ministry of Ecology and Environment

Relations

Remplace:GB 8840-1988