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.
COVENIN 2541 Casing and production tubing for general service in the petroleum industry
COVENIN 2063 Cold formed welded and seamless carbon steel structural tubing in rounds and shapes
COVENIN 1478 Line tubing for general service in the petroleum industry
COVENIN 843 Seamless or welded carbon steel tubes for general service in pressurized fluid transportation
COVENIN 538 Galvanized rigid steel tubes(conduit)for electrical installations
COVENIN 11 Galvanized pipe for electrical installations
EN 9455-12 Soft soldering fluxes -test methods-steel tube corrosion test
EN 1127 Stainless steel tubes -dimensions,tolerances and conventional masses per unit length
EN 1057 Copper and copper alloys-seamless,round copper tubes for water and gas in sanitary and heating applications
EN 969 Ductile iron pipes,fittings accessories and their joints for gas pipelines -requirements and test methods
EN 642 Prestressed concrete pressure pipes,cylinder and non-cylinder,including joints,fittings and specific requirements for prestressing steel for pipes
EN 641 Reinforced concrete pressure pipes,cylinder type,including joints and fittings
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
