TMK TDS Square Section Lead Drill Pipes for Enhanced Durability

Warranty period - 1 yr. Service life is 3 yrs. Average MTBF 400 screws - unscrews, for TMK TDS connection - 50 screws - unscrews

Outer diameter of the coupling end up to and including 175 mm. Tensile strength not less than 965 MPa Yield strength not less than 758 MPa; Relative elongation not less than 13 % Impact toughness KCU value not less than 600 J/sq. m Impact work KV value not less than 54 J

Outer diameter of the coupling end over 175 mm Tensile strength not less than 931 MPa Yield strength not less than 689 MPa; Relative elongation not less than 13 % Impact toughness KCU value not less than 600 J/sq. m Impact work KV value not less than 54 J Pipe hardness shall be 302...364HB at a length of at least 550mm from the ends and 285...364HB at the rest of the pipe.