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.
ISO 9330-6 Welded steel tubes for pressure purposes-technical delivery conditions -longitudinally welded austenitic stainless steel tubes
ISO 9330-5 Welded steel tubes for pressure purposes -technical delivery conditions-submerged arc-welded unalloyed and alloyed steel tubes with specified low temperature properties(Partial revision of ISO 2604-6:1978)
ISO 9330-4 Welded steel tubes for pressure purposes -technical delivery conditions-submerged arc-welded unalloyed and alloyed steel tubes with specified elevated temperature properties (Partial revision of ISO 2604-6:1978)
ISO 9330-3 Welded steel tubes for pressure purposes-technical delivery conditions-electric resistance and induction welded unalloyed and alloyed steel tubes with specified low temperature properties
ISO 9330-2 Welded steel tubes for pressure purposes -technical delivery conditions-electric resistance and induction welded unalloyed and alloyed steel tubes with specified elevated temperature properties
ISO 9330-1 Welded steel tubes for pressure purposes-technical delivery conditions-unalloyed steel tubes with specified room temperature properties
ISO 9330-1/2/3/4 Welded steel tubes for pressure purposes-technical delivery conditions
ISO 9329-4 Seamless steel tubes for pressure purposes -technical delivery conditions-austenitic stainless steels
ISO 9329-3 Seamless steel tubes for pressure purposes -technical delivery conditions-unalloyed and alloyed steels with specified low temperature properties
ISO 9329-2 Seamless steel tubes for pressure purposes -technical delivery conditions -unalloyed and alloyed steel wit specified elevated temperature properties
ISO 9329-1 Seamless steel tubes for pressure purposes -technical delivery conditions-unalloyed steels with specified room temperature properties
ISO 9329-1/2/3/4 Seamless steel tubes for pressure purposes-technical delivery conditions
ADD：Chengnan Industrial Development Zone, Yanshan County, Hebei Province
Domestic phone number：0086-317-6689999
International call：0086-317-6165555
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