Zhijiang has a strict manufacturing procedure for quality control. The machine drawings of our products are drawn in strictly accordance with international standards, such as DIN/EN, ISO, SAE, BSP & JIS. Our production carries out under the standard of ISO 9001:2015.

   At Zhijiang, all cnc machining for our fittings strictly according to the approved drawings within allowable tolerance. The control of every article is rigorously enforced by our internal quality control department.