ISO 1530:2003

Overview - ISO 1530:2003 (Fishing nets - Knotted netting)

ISO 1530:2003 defines the principal characteristics and a standardized method for the description and designation of knotted netting used in fishing nets. Its primary purpose is to facilitate clear communication between purchasers and suppliers by specifying the items of information to be exchanged when ordering knotted netting, helping ensure orders, manufacture and delivery match intended use.

Key topics and technical requirements

• Manufacture systems
  • Two-yarn system (typical machine-made): separate warp-like yarns and shuttle yarns used with knotting devices.
  • Single-yarn system (often hand-made): a single yarn worked sequentially with a netting needle; can be flat or tubular.
• Knot types
  • Standard knot forms are specified with customary designations (for example, weaver’s knot Z-type and S-type, double weaver’s knot, reef knot).
• Mesh construction
  • Twisted mesh (all knots formed in same direction) and untwisted mesh (knots alternate direction).
• Direction of stretch
  • N-stretch (depthwise) and T-stretch (lengthwise). Netting may be stabilized after stretching by chemical or thermal means.
• Size and mesh definition
  • Size expressed as meshes long (ML) × meshes deep (MD), or as number of meshes in one direction and a measured length in the other direction. Mesh size may be specified as length of mesh side, length of mesh (preferred), or opening of mesh.
• Netting yarns
  • Yarn size designation follows ISO 858 (Tex system). Material and construction (staple, filament, textured, etc.) must be stated when required.
• Information to be exchanged
  • Purchaser should specify: intended use (gill-nets, trawl-nets, purse seines, etc.), manufacture type, knot type, direction of stretch/stabilization, netting size/mesh definition, yarn details, finishing (e.g., impregnated, dyed), and packing/make-up instructions.

Applications - who uses ISO 1530 and why

• Net manufacturers and suppliers: to produce and supply netting that meets purchaser specifications.
• Fisheries, vessel outfitters, procurement officers: to place unambiguous orders and ensure functional nets for specific fishing gear.
• Textile engineers and quality managers: to document materials, knotting method, mesh geometry and finishing for production and inspection.
• Standards bodies and regulators: to harmonize technical language and facilitate international trade in fishing gear.

Related standards

• EN ISO 1107:2003 / ISO 1107:2003 - Netting basic terms and definitions.
• ISO 858 - Designation of netting yarns in the Tex system.

Keywords: ISO 1530:2003, knotted netting, fishing nets, mesh size, netting yarns, knot types, N-stretch, T-stretch, netting designation.