... Bolivia,Indonesia,Russia,South America,ect N80 API oil casing pipe Advantage1. High precision in size and ... High connection strength and sealability5. Large inside diameter of tool joint6. High torque resistance7. High fatigue ... 60mm 3. Material:Carbon Steel Q235 type of casing pipe thread Thickness1.24-60mmOut diameter10.3-1219. ... JISMaterialA25,A,B,X42,X46,X52,X56,X60,X65,X70,X80 H40 J55 K 55M65 N80 L ...