oil tubing 1.hot-rolled pipe 2.OD:60.32-114mm, ... .EU, NU end forms 4.R1,R2,R3 length pipe oil tubing1.hot-rolled pipe2.OD:60.32-114mm, WT:4 ... kinds of seamless steel pipe: API 5CT casing pipe and oil tubing, API 5L line pipe, ordinary pipe for fluid use ...