These specifications apply to pipes for steam boilers and pipelines.

Tubes are made from rolled, forged, stripped, drilled or not drilled carbon, alloyed and high-alloyed grades of steel produced in the electric and open-hearth furnaces and also with the use of treatment of liquid synthetic slag in the ladle, supplied by CMCU 1-726-69 and CMTU 1-668-69.

Outer diameter:
hot-deformed: 57 – 219 mm
cold-drawn: 10 – 76 mm
(the number of values: 10; 12; 16; 20; 22; 25; 28; 30; 32; 36; 38; 40; 42; 45; 48; 50; 51; 54; 55; 57; 60; 63; 70; 76; 83; 89; 102; 108; 114; 121; 133; 140; 146; 152; 159; 168; 194; 219)

Wall thickness:
hot: 3,5 – 40 mm
cold-drawn: 2 – 12 mm
(the number of values: 2; 2,5; 3; 3,5; 4; 4,5; 5; 5,5; 6; 6,5; 7; 7,5; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20; 22; 24; 25; 26; 28; 30; 32; 34; 36; 38; 40)

Limit deviation:
hot
diameter:
D 57 – 219 mm ± 1 %
on the wall:
For outer diameter up to 108 mm on:+ 15% – 10%, for outside diameter of more than 108 mm: + 20% – 5%.

cold:
diameter:
Ø 10 – 30 mm: ± 0,3 mm,
D 32 – 50 mm: ± 0,4 mm
D 51 – 76 mm: ± 0,8 %.
on the wall:
S 2 – 12 mm: ± 10%.

Notes:

A new standard in tubes for steam boilers – TU 14-3R-55-2001
Steel grades – 20, 20-ПВ, 12Х1MФ, 12Х1MФ-ПВ, 15ХM, 15MA, 12Х18Н12Т
Pipe length up to 9 m (by agreement)
Pipes pass 100% non-destructive testing
Tubes are designed for steam boilers and pipelines with high and ultrahigh steam characteristics.