Of iron or steel

CN code 830710 covers flexible tubes and protective conduit made of iron or steel, designed to route and protect electrical, hydraulic and pneumatic lines in demanding industrial environments. Products in this category include armoured metal conduit, spiral cable protectors, interlocked steel flexible conduit with and without braid, and protective steel jacketing. These articles are characterised by high mechanical strength, resistance to abrasion, oils and certain chemicals. They are manufactured in a variety of internal and external diameters, with or without anti-corrosion coatings. Applications span electrical installations, machinery, vehicles, industrial automation equipment and infrastructure projects. The use of iron or steel provides superior mechanical strength compared to flexible tubing made from lighter metals, making this code relevant for demanding industrial applications.

Flexible steel and iron conduit under CN 830710 is an essential component in electrical installations and automation systems in manufacturing plants, where cables must be protected from mechanical damage, vibration or contact with liquids. In the automotive sector, these products are used as protective housings for wiring harnesses and brake line conduits. In construction, they are used for routing electrical installations in walls and under floors, especially where fire resistance or rodent protection is required. Medical devices and laboratories use flexible steel tubing for conveying media in sterile environments. The naval and offshore industries rely on armoured conduit for cable protection in marine environments subject to significant corrosion and mechanical stress. Stainless steel variants offer extended service life in aggressive environments.

Classification of goods under CN code 830710 requires confirmation that iron or steel is the dominant material. Customs authorities may examine the cross-section of the tube, production methods such as spiral winding, metallic braiding or welding, and the intended use of the product. It is important to distinguish steel conduit classified here from aluminium or copper flexible tubing which falls under CN 830790. For EU imports, technical documentation is typically required, including cross-sectional drawings, material specifications and the production standard to which the article is manufactured. Compliance certificates to EN or IEC standards are relevant for products used in electrical installations. For significant import volumes, obtaining a BTI ruling to confirm classification is advisable.

CN code 8307 10 covers flexible tubing of iron or steel of base metal. Import into the EU is subject to standard TARIC duty rates. Products must meet relevant EN standards and REACH requirements for chemical substances in metals. Customs declarations require a commercial invoice, certificate of origin and manufacturer's declaration of conformity.