... tubing 1.hot-rolled pipe 2.OD:60.32-114mm, WT:4.83-12.75mm 3.EU, NU end forms 4.R1 ... manufacture various kinds of seamless steel pipe: API 5CT casing pipe and oil tubing, API 5L line pipe, ordinary pipe for ... (mm)WT(Ib/ft)GRADETHK(mm)END60.32(2 3/8")4.70H,J,L,P4.83NU , EU5.80C ... N,L,P7.82EU9.45L,C8.64EU88.90(3 1/2")9.20H,J,C,N,L,P6.45NU9. ... L5.74NU11.00H,J,C,N,L6.65EU114.30(4 1/2")12.60H,J,L,N,C,T12.75NU12. ...