Ductile iron pipe Hs Code

Ductile iron pipe harmonized system code

Product Overview Ductile iron pipe classified under HS Code 730300 refers to a robust, cast iron pipe manufactured from spheroidal graphite iron, known for its enhanced ductility and tensile strength compared to traditional cast iron. These pipes typically exhibit diameters ranging from 80 mm to over 1,200 mm, with wall thicknesses conforming to ISO 2531 or equivalent standards. The production process involves molten iron treatment with magnesium to achieve a nodular graphite microstructure, followed by centrifugal casting, heat treatment, and surface coating to ensure corrosion resistance and mechanical integrity. Under HS Code 730300, ductile iron pipes are categorized primarily into subgroups based on their intended use and coating types, including cement-mortar lined pipes, bitumen-coated pipes, and mechanically jointed or flanged variants. These pipes are extensively employed in water supply systems, wastewater management, irrigation, and industrial fluid transport within food service, retail, and processing sectors due to their strength, durability, and ease of installation. The product's value proposition lies in its optimal balance of mechanical robustness, corrosion resistance, and cost-effectiveness, positioning it as a preferred choice for infrastructure projects requiring long service life and regulatory compliance. HS Code Classification & Trade Specifications The HS Code 730300 falls under Chapter 73 (Articles of Iron or Steel), Heading 7303 (Tube or Pipe Fittings of Iron or Steel), with the six-digit classification 730300 specifically designating ductile iron pipes. This classification is justified by the product’s material composition—ductile iron—and its form as pipes or tubes, distinguishing it from fittings or other iron or steel products. For international trade, ductile iron pipes under this HS code are commonly packaged in bundles secured with steel strapping, often accompanied by protective end caps and corrosion-inhibiting coatings to prevent damage during transit. Preservation methods comply with ISO 8179-1 standards, ensuring resistance to environmental factors and maintaining product integrity over long shipping durations. Quality control adheres to ISO 2531, EN 545, and AWWA C151 standards, addressing parameters such as tensile strength (minimum 420 MPa), elongation, wall thickness tolerances, and pressure ratings. Export documentation aligns with WTO agreements and customs formalities, incorporating precise tariff codes and product descriptions to facilitate smooth customs clearance. This structured classification supports accurate duty assessment, regulatory compliance, and efficient logistics in global supply chains.

Ductile iron pipe Chapter Note

1.- In this Chapter the expression “cast iron” applies to products obtained by casting in which iron predominates by weight over each of the other elements and which do not comply with the chemical composition of steel as defined in Note 1 (d) to Chapter 72. 2.- In this Chapter the word “wire” means hot or cold-formed products of any cross-sectional shape, of which no cross-sectional dimension exceeds 16 mm.