Zhejiang ChengGao Valve Co.,Ltd. is certificated by ISO 9001:2000, and the quality inspection,supervision and control for raw material, production process and finished products are controlled under Quality Management Department according to ISO 9001:2000.Our testing details are as below:

·Initial inspection for raw material and everything to be inspected by operators
·Statistical inspection for everything checked by specialized inspectors, to look for errors
·Develop and enact inner criteria, establish training plans to staff,Research and testing