Certificates

API 600 certificate	Certificate of First Class Supply for China National Petroleum Corporation	Membership Certificate of Sinopec	Manufacture License of Special Equipment Peoples's Republic of China
patent certificate of check valve and wedge-craulking butterfly valve in high temperature	qualification certificate of enterprise's QC department	certificate for the system of inspection measurement and test	membership certificate
certificate of definited manufacturer for China Chemical and Industrial Equipment Co., Ltd.	supplier member certificate of Management System for Daqing Oil Field	certificate of adopting International Standards	certificate of standardization lever
certificate of ISO14001	patent certificate of plane metal to metal butterfly valve	ISO 9000	CE certificate