Tianjin Jinggong Petroleum Pipe Fittings Co., Ltd., located in Tianjin City, is an experienced joint-venture petroleum pipe and fitting manufacturer. We enjoy convenient transportation access and lower material cost. We have 10 modes of tubing couplings and 37 modes of casing couplings, which have 6 steel levels. Main kinds of thread are long round thread casing (LC), short round thread casing (STC) and buttress thread casing (BC). Special-bevel couplings have non-upset tubing (NU)) and extend-upset tubing EU. NU has a mode of special-clearance coupling. EU has two modes of special -clearance couplings. With rapid development, we can produce 1,300,000 couplings. We have passed API, and our products include all types of API 5CT.If you are interested in our products, please contact us without any hesitation. We are looking forward to establishing mutually beneficial business relationships with clients both in the domestic and the overseas markets.