Jingbo Petroleum Machinery Co.,Ltd Founded in 1986, is committed to providing quality oilfield hoses worldwide. Jingbo has 30 years experience in the oilfield hoses area and is the leading manufacturer of rotary drilling hose, choke kill hose, BOP hose and hammer union. As Chinas first API authorized manufacturer of oilfield hoses, Jingbo has got the certificates of API Spec 7K-0376, API Spec 16C-0275, API Spec 16D-0109, API Spec Q1-2085 and API ISO9001-2008. Jingbo sets up advanced laboratory and is committed continuously to improving production technology. The development of new formula improves the production efficiency and product quality. Jingbo has strong quality control team and tests each batch of material. A 100% full inspection of finished hoses before delivery is made to provide quality products. Each hose is tested at 2 times of working pressure. The test graph and certificate are available for each hose. Jingbo exports hoses to more than 20 countries. Such as the USA, Russ...