Our company is a designated manufacturer of Sinopec, CNPC, CNOOC and China Coal. We have passed the authentication of ISO9001, ISO4001, OHSAS18001, HSE management system and API authentication. Meanwhile, our company can produce and supply products according to national standards, industrial standards, enterprise standards, ISO, DIN, SAE and other internationally universal standards. Our engineers and technicians can provide visiting service according to the requirement of users to design and produce various specifications of non-standard products for our users.