1. Having "AAA" bank credit
2. Passed ISO9001 and ISO/TS16949 international quality certificaton.
3. Making according to customer`s drawing or samples.
DIN flange
Standard: DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638, DIN 2673
Types: Slip On flanges, Threaded flanges, Socket Welding flanges, Blind flanges
Pressure Grade: 6 Bar, 10 Bar, 16 Bar, 25 Bar, 40 Bar
Size: DN10 - DN 1000
Service
We regard the quality as the life of our enterprise and we have acquired a high reputation both a home and abroad by offering our customers with first-class products, competitive price and perfect after-service.
Markets
Our products are popular in the worldwide market, including North American, South American, European, African and Southeast Asian markets and so on.
We can make according to customer`s drawing or samples.
Chang Tong Technology Co., Ltd. Established in September 2003, is situated in Industrial Demonstration Park of Gongyi, Zhengzhou city. The company mainly produces automobile leaf spring, various specification spring flat steel, brake valve, flange (blank) and pipeline flange (blank).
The company prides itself on its advanced techniques, excellent equipment, scientific management and powerful technology. The quality of its products has passed the standards of QCn29035-91 and GB1222-84, and has been attested by the international quality system ISO9001: 2000. It has established a set of systematical sales network, and set up many branch companies in dozens of cities all over the country, such as Zhengzhou, Chengdu, Liuzhou, Guiyang, Zunyi, Shuicheng, Xi'an, Xining, Changsha, Yinchuan, Jishou, Ge'emu, as well as the Inner Mongolia Autonomous Region. Its products sell well nationwide throughout the country and exported to many countries and regions, for instance, Southeastern Asia, DPRK and India, and enjoy great popularity among the customers.
