... JISG3454 etc.Grade10#-45#, 16Mn, A53-A369, API J55-API P110, ST35-ST52, Q195-Q345, 20#, 16Mn ... , A53(A, B), API J55, API K55, API N80, API L80, API P110, St37, ... L390M, L415M, L450M, L485M, L555M, L625M, L690M, H40, J55, K55, M65, L80, C95, N80, C90, T95, P110, ,Q125 ... end, beveled, cut square, grooved, threaded and coupling, etc.Applicationline pipe for use in pipeline transportation ...