The Brazil standard NBR7675 is the fundamental specification for ductile iron pipes (DI pipes) in water applications, covering:
- Chemical composition requirements for pipe materials (carbon, silicon, manganese, phosphorus, sulfur, etc.)
- Mechanical performance indicators (tensile strength ≥420 MPa, yield strength ≥300 MPa, elongation ≥10%)
- Dimensional tolerances and weight standards
- Technical requirements for internal and external coatings
- Water pressure testing standards
The latest standard, NBR15420:2022, is a key update to Brazil’s standards in 2022. NBR15420:2022 strengthens the following aspects compared to the previous standard:
- Environmental adaptability requirements: Enhances the weather resistance and UV resistance of coatings to address Brazil’s diverse climate conditions.
- Seismic performance specifications: Clarifies the design and installation requirements for ductile iron pipes in seismically active areas.
- Sustainability standards: Adds material recycling requirements and life cycle assessment indicators.
- Smart water compatibility: Reserves technical interface standards for future smart water systems.
DINSEN ductile iron pipes not only fully comply with Brazilian dual standards, but also surpass them in key performance indicators.
- High-strength design: Across the entire size range of DN80-DN2600, the actual tensile strength reaches 450-500 MPa, exceeding the standard by 20%.
- Excellent elongation: Elongation is consistently maintained at 12-15%, providing excellent seismic resistance and adaptability to foundation settlement.
- Special coating system: Utilizing an environmentally friendly zinc-rich primer + high-performance epoxy resin coating, it has passed salt spray testing for over 3000 hours, far exceeding standard requirements.
DINSEN ductile iron pipes, exceeding Brazil standards NBR7675 and NBR15420:2022 in quality, combined with a deep understanding of the unique needs of the Brazilian market, provide reliable, economical, and sustainable piping solutions for water projects. We are not only a product supplier but also a long-term partner in Brazilian infrastructure development, committed to improving the safety and efficiency of Brazilian water systems through innovative technologies.
For more information on the technical specifications and project examples of DINSEN ductile iron pipes conforming to Brazilian standards, please contact us for technical data.
Post time: Dec-03-2025
