Questions & Answers
Steel grades of casing steel pipes
According to GOST 632-80 standards: M, L, E, K, D.
According to API Spec 5CT: Q125, P110, T95, C90, L80-13Cr, L80-9Cr, L80-1, L80, N80Q, N80, K55, J55, H40.
Corrosion-resistant and alloy steels are also used: Super 13Cr, 22Cr.
Standards for steel casing pipes
Ukrainian standards (DSTU):
DSTU 4219;
DSTU ISO 11960.
European standards:
EN 10208;
EN ISO 11960.
International standards:
ISO 13679;
ISO 11960;
API Spec 5B;
API Spec 5CT.
Table for calculating the weight of 1 meter of steel casing pipes
| Outer diameter, mm | Wall thickness, mm | Weight of 1 meter, kg |
| 114 | 7,4 | 19,0 |
| 114 | 8,6 | 21,7 |
| 127 | 7,5 | 22 |
| 127 | 9,0 | 25,9 |
| 140 | 7,0 | 22,9 |
| 140 | 8,0 | 25,8 |
| 146 | 8,5 | 22,3 |
| 146 | 7,7 | 26,2 |
| 146 | 6,5 | 28,6 |
| 168 | 10 | 38,8 |
| 168 | 8,9 | 34,9 |
| 168 | 7,3 | 28,9 |
| 178 | 9,2 | 37,9 |
| 219 | 10 | 51,6 |
| 219 | 8,0 | 41,7 |
| 245 | 10 | 57,8 |
| 245 | 8,9 | 51,8 |
| 324 | 9,5 | 73,7 |