Along with the years of entrepreneurial journey of Zhongyuan people, she gradually formed her own spiritual pillar and behavioral norms. In the silent inheritance, she guided Zhongyuan Company towards a more brilliant tomorrow.
DIN 2559 Edge preparation for welding -weld preparation inside diameter of steel pipes
DIN 2470-1 Steel gas pipelines for permissible working pressures up to 16 bar -pipes and fittings
DIN 2470-1/2 Steel gas pipelines-Part 1:for permissible working pressures up to 16 bar-pipes and fittings -Part 2:for permissible working pressures exceeding 16 bar-requirements for pipeline components
DIN 2460 Steel water pipes
DIN 2458 Welded steel pipes and tubes,dimensions,conventional masses per unit length
DIN 17118 Cold rolled steel sections -technical conditions of delivery
DIN 14462-2 Water conduit for fire extinguishing-dry rising mains,PN 16,wired permanently in buildings
DIN 14462-1 Water conduit for fire extinguishing -definition of terms,diagrammatic views
DIN 14462-1/2 Water conduit for fire extinguishing
DIN 11850 Stainless steel tubes for the food industry,dimensions,materials
DIN 8563 Quality assurance in welding operations
DIN 4930 Pipes for use in freezing shaft sinking-dimensions and technical delivery conditions
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