EN124 D400 Ductile Iron Manhole Cover for Highway with ISO9001 Certification - Heavy Traffic Load Class 400

This heavy-duty ductile iron manhole cover is engineered for demanding highway infrastructure applications, featuring EN124 D400 load classification and ISO9001:2015 certified manufacturing standards.

• Road Drainage Systems: Essential for drainage manholes on urban roads, main roads, and highways
• Municipal Engineering: Underground pipe networks for water supply, drainage, power, gas, and communications
• Residential Areas: Practical and aesthetic coverage for sewers and inspection wells
• Industrial Zones: Underground equipment wells and pipeline inspection access points
• Traffic Safety: High-strength design withstands heavy vehicle pressure with anti-slip features

• Material Preparation: High-quality pig iron and scrap steel with spheroidizing treatment
• Precision Casting: Sand casting using manual, mechanical, or resin sand molding
• Heat Treatment: Annealing process to enhance material toughness
• Surface Finishing: Sandblasting and protective coating application
• Quality Assurance: Comprehensive testing including spectrometer analysis and mechanical performance verification