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.
NBR 8261 Round,square or rectangular tubular section of cold rolled carbon steel,seamless or welded,for structural use
NBR 7734 Chrome molybdenum steel 4130 for seamless tubes of aeronautical quality
NBR 7543 Seamless or welded,austentic stainless steel tubes for conduction
NBR 7433 Tubular steel products -determination of mechanical properties in tension
NBR 6640 Welded round carbon steel tubes,semi-tube smoothing test.
NBR 6591 Welded round,square,rectangular and special carbon steel tubes for industrial use
NBR 6358 Welded or seamless carbon steel and alloy steel tubes for thermal exchange(boilers,exchangers and furnaces)-basic dimensions
NBR 6338 Round steel tubes-bending test
NBR 6321 Seamless carbon steel tubes for the conduction of high temperature fluids
NBR 6316 Chrome-nickel-steel seamless tubes for refinery furnaces
NBR 6206 Round steel tubes-widening test
NBR 6205 Round steel tubes -flanging test
ADD：Chengnan Industrial Development Zone, Yanshan County, Hebei Province
Domestic phone number：0086-317-6689999
International call：0086-317-6165555
E-mail:9905791@qq.com
