The petroleum tubing mainly transports the oil and gas at the bottom of the oil well to the surface, as well as transportation of some surface oil and gas. The commonly used standard is API SPEC 5CT, and the commonly used steel grades are J55, N80, L80, C90, P110, 80S, 95S, etc. The specifications of the tubing we supply are EUE or NU, with an outer diameter from 2 3/8″(60.3mm) to 4 1/2″(114.3mm). To learn more about our products, please contact, and 5 production lines will ensure sufficient supply capacity.