Questions & Answers
Carbon steels (according to GOST 380-2005): St3Gsp, St3Gps, St2sp, St2ps, St2kp, St0, St3sp, St1sp, St1ps, St1kp.
Low-alloy steels: 15KhSND, 17G1S, 09G2S, 10G2S1, 17G1S-U.
Structural steels: 20, 25, 30, 10, 08, 15, 35, 45, 40.
European equivalents (according to EN 10219): S235, S355, S195, S275.
International standards:
International Organization for Standardization 11961: International equivalent of API Spec 5DP;
American Petroleum Institute Spec 5DP: Basic standard for drill pipe. Defines requirements for quality control, dimensions, mechanical properties, and materials.
European standards:
EN 10297-1: Seamless pipes for mechanical engineering.
Specialized standards and practices:
API Spec 7-1: Drill string connections and threads;
American Petroleum Institute RP 7G: Inspection and use of drill pipe.
| Outer diameter, mm | Wall thickness, mm | Weight of 1 meter, kg (approximate) |
| 60,3 | 7,1 - 9,1 | 9,0 - 11 |
| 73 | 7,0 - 9,2 | 10,5 - 13,5 |
| 88,9 | 6,5 - 11,4 | 13 - 21,8 |
| 101,6 | 6,5 - 12,7 | 15 - 28 |
| 114,3 | 7,4 - 10,9 | 19 - 27 |
| 127 | 7,5 - 12,7 | 22 - 35,8 |
| 139,7 | 7,7 - 12,7 | 25 - 40 |