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Steel grades of steel tees
Alloy steels: 12Kh2MFSR, 20KhML, 15Kh1M1F, 12Kh1MF.
Low-alloy steels: 15KhM, 12KhM, 15Kh5M, 17G1S, 10G2, 09G2S.
Carbon steels: St45, St20K, St35, St20, St10.
Steel Tee Standards
GOST standards:
GOST 22823–83 — Welded reducing tees;
GOST 22822–83 — Welded equal tees;
GOST 17376–83 — Steel tees;
GOST 17376–2001 — Seamless steel tees.
International standards:
ISO 5251 — Pipe fittings;
ISO 3419 — Welded steel tees;
European standards:
EN 10253-2 — Alloy steel fittings;
EN 10253-1 — Carbon steel fittings;
DIN 2616 — Reinforced tees;
DIN 2615 — Steel tees.
Steel Tee Weight Chart
| DN (mm) | Dн (mm) | Wall thickness (mm) | Weight, kg |
| 15 | 21.3 | 2.8 | 0.09 |
| 20 | 26.8 | 2.8 | 0.12 |
| 25 | 33.5 | 3.2 | 0.18 |
| 32 | 42.3 | 3.5 | 0.3 |
| 40 | 48.3 | 3.5 | 0.36 |
| 50 | 60.3 | 3.5 | 0.55 |
| 65 | 76.1 | 3.5 | 0.85 |
| 80 | 88.9 | 4.0 | 1.2 |
| 100 | 114.3 | 4.0 | 1.95 |
| 125 | 139.7 | 4.5 | 3.1 |
| 150 | 168.3 | 4.5 | 4.5 |
| 200 | 219.1 | 6.0 | 8,5 |
| 250 | 273 | 7.0 | 14.5 |
| 300 | 323.9 | 8.0 | 22 |