Questions & Answers
Low-alloy steels: 15KhM, 10G2, 17G1S, 09G2S.
Structural steels: 45, 35, 20, 10.
Carbon steels: St45, St35, St20, St10.
GOST Standards:
GOST 9.303-84 — Coating Requirements;
GOST 9.302-88 — Coating Testing Methods;
GOST 9.301-86 — Metallic Coatings;
GOST 9.307-89 — Hot-Dip Galvanizing;
GOST 32528-2013 — Seamless Pipes;
GOST 550-75 — Seamless Pipes for Oil Refining;
GOST 8731-74 — Technical Requirements;
GOST 8734-75 — Seamless Cold-Deformed Pipes;
GOST 8732-78 — Seamless Hot-Deformed Pipes.
International standards:
ISO 14713 — Corrosion protection;
ISO 1461 — Hot-dip galvanizing;
ISO 9329 — Seamless pressure tubes;
ISO 3183 — Tubes for the oil and gas industry.
European standards:
EN 10240 — Protective coatings for pipes;
EN ISO 1461 — Hot-dip galvanizing;
EN 10297-1 — Tubes for mechanical engineering;
EN 10305-1 — Seamless cold-drawn tubes;
EN 10216 — Seamless pressure tubes;
EN 10210 — Hot-formed structural tubes.
| Outer diameter, mm | Wall thickness 2 mm | 3 mm | 4 mm | 5 mm | 6 mm |
| 20 | 0.89 | 1.27 | 1.62 | 1.96 | 2.27 |
| 25 | 1.13 | 1.63 | 2.1 | 2.55 | 2.97 |
| 32 | 1.48 | 2.14 | 2.77 | 3.36 | 3.92 |
| 40 | 1.87 | 2.72 | 3.52 | 4.29 | 5.02 |
| 50 | 2.36 | 3.44 | 4.47 | 5.46 | 6.4 |
| 57 | 2.7 | 3.94 | 5.12 | 6.25 | 7.34 |
| 76 | 3.63 | 5.34 | 6.99 | 8.58 | 10.12 |
| 89 | 4.27 | 6.31 | 8.28 | 10.2 | 12.06 |
| 108 | 5.2 | 7.73 | 10.2 | 12.61 | 14.97 |
| 133 | 6.43 | 9.61 | 12.74 | 15.81 | 18.82 |