Questions & Answers
Steel grades of enameled steel pipes
Structural steels: 30, 25, 20, 10, 15;
Carbon steels: St3kp, St3ps, St3sp, St20, St10;
Low-alloy steels: 10G2, 17G1SU, 17G1S, 09G2S;
Enameled steel pipe standards
Main GOST standards for steel pipes:
GOST 9941-81;
GOST 9940-81;
GOST 8734-75;
GOST 8732-78;
GOST 10705-80;
GOST 3262-75;
GOST 10704-91.
International standards (for coatings and enameled pipes):
ISO 4532;
ISO 4531;
ISO 28721-2;
ISO 28721-1.
Standards for enamel coatings:
GOST 9.303-84;
GOST 9.302-88;
GOST 9.307-2021;
GOST 24789-81;
GOST 24788-81.
European standards:
EN ISO 28721-1;
EN 10217-7;
EN ISO 28721-2;
EN 10216-5.
Table for calculating the weight of 1 meter of enameled steel pipes
| Outer diameter, mm | Wall thickness, mm | Theoretical weight of 1 m, kg |
| 18 | 2,0 | 0,8 |
| 20 | 2,0 | 0,91 |
| 25 | 2,0 | 1,16 |
| 32 | 2,5 | 1,83 |
| 38 | 2,5 | 2,2 |
| 45 | 3,0 | 3,13 |
| 57 | 3,0 | 4,0 |
| 76 | 3,5 | 6,27 |
| 89 | 3,5 | 7,43 |
| 108 | 4,0 | 10,26 |
| 133 | 4,0 | 12,75 |
| 159 | 4,5 | 17,18 |