Questions & Answers
Structural steels: 10, 35, 25, 15, 20.
Carbon steels: St15, St20, St3sp, St3ps, St3kp, St10, St2, St1.
International standards:
ISO 14713 — Corrosion protection;
ISO 1461 — Hot-dip galvanizing;
ISO 965 — Thread tolerances;
ISO 228-1 — Cylindrical pipe threads;
ISO 7-1 — Tapered pipe threads.
GOST standards:
GOST 9.303-84 — General requirements;
GOST 9.302-88 — Coating control;
GOST 9.301-86 — Metallic coatings;
GOST 9.307-89 — Hot-dip galvanizing;
GOST 8969-75 — Steel nipples;
GOST 16093-2004 — Thread tolerances and parameters;
GOST 6211-81 — Tapered pipe threads;
GOST 6357-81 — Cylindrical pipe threads.
European standards:
EN ISO 1461 — Hot-dip galvanizing;
EN 10226-1 — Sealed pipe threads;
ISO 965 — Thread tolerances.
For short threads (≈50–60 mm)
| Du (DN) | Outer diameter, mm | Length, mm | Weight, kg |
| 15 | 21.3 | 50 | 0.04 |
| 20 | 26.8 | 55 | 0.06 |
| 25 | 33.5 | 60 | 0.1 |
| 32 | 42.3 | 60 | 0.15 |
| 40 | 48.3 | 60 | 0.2 |
| 50 | 60.3 | 65 | 0.32 |
| 65 | 76.1 | 70 | 0.5 |
| 80 | 88.9 | 75 | 0.7 |
| 100 | 114.3 | 80 | 1.1 |
For long threads (≈100–120 mm)
| Du (DN) | Length, mm | Weight, kg |
| 15 | 100 | 0.08 |
| 20 | 110 | 0.12 |
| 25 | 120 | 0.2 |
| 32 | 120 | 0.3 |
| 40 | 120 | 0.4 |
| 50 | 130 | 0.65 |
| 65 | 140 | 1.0 |
| 80 | 150 | 1.4 |
| 100 | 160 | 2.2 |