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.
EN 10240 Internal and/or external protective coatings for steel tubes-specification for hot dip galvanized coatings applied in automatic plants
EN 10237 Metallic materials-tubes-ring tensile test
EN 10236 Metallic materials-tubes-ring expanding test
EN 10235 Metallic materials -tubes -flanging test
EN 10234 Metallic materials-tubes-drift expanding test
EN 10233 Metallic materials -tubes-flattening test
EN 11961 Petroleum and natural gas industries -steel pipes for use as drill pipes -specification
EN 11960 Petroleum and natural gas industries-steel pipes for use as casing or tubing for wells
EN 10305-1 Precision steel tubes
EN 10297-1 Steel tubes for general mechanical applications
EN 10256 Non destructive testing of steel tubes-qualification and competence of levels 1 and 2 non destructive testing personnel
EN 10255 Carbon steel tubes suitable for welding or threading
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