We, Wuxi Free Petroleum Tubular Manufacturing Co., Ltd.(hereinafter called WFP), are the leading API coupling manufacturer and supplier in China. We produce tubing coupling, casing coupling, line pipe coupling according to API 5CT,5B and 5L standards, we also can produce premium connection coupling as per customer's requirements.

We have an annual production capacity of 600000 pieces of API standard coupling, The steel grades cover the range of J55,K55,N80,L80,C90,T95,P110 and etc. The sizes include 2-3/8"(60.33mm) to 4-1/2"(114.30mm) tubing coupling;...