Tubing / Casing pup joints: 1.Sizes range from 2 3/8" to 20" 2.grades: J55, K55, L80, N80, C90, T95 and P110 3.For casing The pub joints for casing and tubing, we offer various size and material.Pups JointWe manufacture all range of couplings as per API specifications in all groups for casings and tubing. All of our couplings meet the American Petroleum Institute (API) Specifications 5CT. The ...