Ductile Iron ISO2531 En545 Double Socket Connection Pipe Fittings Socket K Sleeve. Ductile Iron Material: Made of ductile iron grade 500-7/450-12 per ISO10083 for high strength. Dual Certification: Meets ISO2531 and EN545 standards for international compliance. Versatile Applications: Ideal for water supply, drainage, fire protection, and irrigation systems. Robust Pressure Rating: Rated PN10/16 for reliable performance in medium temperature piping. Corrosion Protection: Features fusion bonded epoxy lining and bituminous external coating. OEM/ODM Services: Full customization, design-based, and sample-based customization available. Fast Lead Time: Production within 15 workdays for both peak and off-peak seasons. 100% Quality Inspection: Every finished product undergoes visual and functional inspection.