... distributors around the world. Casing Pipe OCTG Pipe casing and tubing Serves as walls of a well. Steel Grades: K55, J55 ... ,C90,C95, P110 T95, M65,E75,X95,G105,S135 1) Tubing OD: 2 3/8" -----4 1/2" WT: 0.167 ... round thread, L: Long round thread Length R1 R2 R3 Tubing 6.10 -7.32 m 8.53-9.75m 11 ...