GB11780-2005
The minimum mesh size of the traw1 cod-end in South China Sea
南海区拖网网囊最小网目尺寸
GB 11780-2005 is a current mandatory Chinese national standard for The minimum mesh size of the traw1 cod-end in South China Sea. It appears in the Food compliance cluster with a product safety focus and has an implementation date of Oct 1, 2005.
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 specifies the minimum mesh size for trawl cod-ends and applies to otter trawls used by fishing vessels operating in the South China Sea fishing grounds. It is mandatory for all relevant fishing operations within this specified region. The regulation specifically targets the cod-end structure of trawl nets, ensuring sustainable fishing practices. It references SC/T 5001 for terminology.
Technical requirements
The standard outlines the structural requirements for the trawl cod-end. It mandates a specific configuration where the front and rear sections consist of diamond mesh, while the middle section must utilize square mesh. This specific structural design is a mandatory requirement for compliance. Regarding dimensions, the standard establishes the minimum mesh size at 40mm. This measurement refers to the mesh size of a single-layer cod-end structure after water absorption and shrinkage. Manufacturers and operators must ensure the mesh does not fall below this critical threshold. The standard represents an increase from the previous 39mm limit specified in GB 11780-1989.
Testing methods
Mesh size is expressed as the inner diameter of the mesh. The measurement procedures must be conducted in accordance with GB/T 6964, while the pre-tension applied during testing must follow the specifications in GB/T 6965. Testing methods for square meshes are identical to those used for diamond meshes. Proper measurement of the mesh inner diameter is crucial for verifying compliance with the 40mm limit.
FAQs
What products are regulated under GB 11780-2005?
It regulates the cod-ends of trawl nets used by fishing vessels operating in the South China Sea. Compliance is mandatory for all applicable fishing gear.
Are there any updates from the previous version of this standard?
Yes, compared to GB 11780-1989, the minimum mesh size was increased from 39mm (diamond mesh) to 40mm (square mesh), and structural requirements for the cod-end were added.
How is the mesh size measured according to this standard?
The mesh size is measured by its inner diameter after water shrinkage, using specific pre-tension and measurement methods outlined in GB/T 6964 and GB/T 6965. Square and diamond meshes use the same testing method.
The summary above provides a high-level overview of GB 11780-2005. To ensure complete compliance for your fishing equipment entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 11780-2005 today to access all detailed parameters, structural diagrams, and testing procedures.
Applicability hints
- Type
- Foundational
- CCS
- B56
- ICS
- 65.150
- Competent department
- Ministry of Agriculture and Rural Affairs
- Technical committee
- National Technical Committee on Aquatic Products of Standardization Administration of China
Relationships
Replaces:GB 11780-1989