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About

Ningbo Dongding Special Tube Co., Ltd. (Dongding) is a leading Chinese manufacturer specializing in the R&D and production of ultra-long precision stainless steel tubes. The company is a subsidiary of Zhenhai Petrochemical Jianan Engineering Co., Ltd., which was formerly a wholly-owned subsidiary of Sinopec Zhenhai Refining & Chemical Company.

Focused on high-end special tubes for the petrochemical and aerospace industries, Dongding is a national high-tech enterprise and a Specialized and Sophisticated SME based in Ningbo. It has a Zhejiang Provincial Enterprise Research Institute and a CNAS-accredited Testing Center, with full-chain technical capabilities from R&D to testing.


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2026-02-12
Youth League Branch of Dongding Special Tubes Successfully Holds New Year's Day Tug-of-War Competition
As the new year begins, everything takes on a fresh look. To enrich the spare-time cultural life of young employees, enhance team cohesion and solidarity, and create a joyful, harmonious and positive festive atmosphere, the Youth League Branch of Dongding
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2025-12-31
High-speed Rolling Mill Put into Operation at Dongding Special Tubes to Empower Production Capacity Upgrade — RMB 15 Million Equipment Upgrade Project Delivers Results
Recently, the newly added high-speed rolling mill of Dongding Special Tubes has completed installation and commissioning and been officially put into use, effectively breaking the existing production capacity bottleneck of seamless tubes and marking that
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2025-12-09
Dongding Special Tubes Successfully Approved as "Zhejiang Provincial Enterprise Research Institute"
Recently, the Department of Economy and Information Technology of Zhejiang Province released the list of 2025 Zhejiang Provincial Enterprise Research Institutes.
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2025-10-31
Dongding Special Tubes Obtains Military Standard Certification, Laying Another Key Cornerstone for Market Expansion
Recently, Dongding Special Tubes has successfully passed the GJB 9001C Weaponry Quality Management System Certification (hereinafter referred to as Military Standard Certification).
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2025-09-30
Dongding Special Tubes Awarded IATF 16949 Certification, Gaining Access to the International Automotive Market
On September 28, Dongding Special Tubes officially passed the IATF 16949:2016 Quality Management System Certification and received the certificate.
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2025-01-15
Dongding Special Tubes Successfully Obtains CNAS Laboratory Accreditation Certificate
Recently, the laboratory of Dongding Special Tubes has successfully passed the assessment conducted by the China National Accreditation Service for Conformity Assessment (CNAS) and received the laboratory accreditation certificate on the 13th of this mont
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2024-12-31
Dongding Special Tubes Recognized as 2024 Ningbo Municipal Green Factory
Recently, Dongding Special Tubes has been awarded the title of 2024 Ningbo Municipal Green Factory, marking a major achievement for the company in green manufacturing and sustainable development.
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Tel

0574-6333 5161 / 189 0674 0161

E-mail

ddtgb@izpje.com