TU 14-3-460-75. Seamless Steel Pipes for Steam Boilers and Pipelines

Pipes are used for steam boilers and turbo generators designed for high and ultrahigh steam characteristics.

Outside Diameter:
Hot-formed: 57 – 219 mm
Cold-formed: 10 – 76 mm
(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-formed: 3,5 – 40 mm
Cold-formed: 2 – 12 mm
(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)

Tolerances:
Hot-formed
OD:
D 57 – 219 mm: ± 1 %
WT:
OD < 108 mm:+ 15% – 10%, OD > 108 mm: + 20% – 5%.

Cold-formed:
OD:
D 10 – 30 mm: ± 0,3 mm,
D 32 – 52 mm: ± 0,4 mm,
D 51 – 76 mm: ± 0,8 %.
WT:
S 2 – 12 mm: ± 10%.

Notes:

1. 1. Steel grades: 20, 20-PV, 12Cr1MoV, 12Cr1MoV-PV, 15CrMo, 15MnSi, 12Cr18Ni12Ti.
2. Length up to 9 m (subject to agreement).
3. Pipes pass 100% non-destructive test.

Sizes (Hot-formed)

OD, mm

WT, mm

OD, mm

WT, mm

OD, mm

WT, mm

57; 60

3,5 – 12

114

6 – 26

159

6 – 36

76; 83; 89

3,5 – 20

121

5 – 26

168

6,5 – 40

102

4,5 – 16

133

6 – 34

194; 219

8 – 36

108

4,5 – 22

140; 146; 152

6 – 36

Sizes (Cold-formed)

OD, mm

WT, mm

OD, mm

WT, mm

OD, mm

WT, mm

10

2; 2,5

28 – 36

2 – 8

51 – 57

2,5 – 12

12

2; 2,5; 3

38

2 – 9

60; 63; 70

3 – 12

16

2 – 4

40

2,5 – 11

76

3,5 – 12

20; 22

2 – 5

42

2,5 – 12

25

2 – 6

45; 48; 50

2,5 – 11

Mechanical properties

Steel Grade

Tensile Strength, N/mm² (min)

Yield Strength, N/mm² (min)

Elongation, % (min)

20, 20-PV

412 – 549

216

long. – 24,
trans. – 22

12Cr1MoV, 12Cr1MoV-PV

441 – 637

274

long. – 21,
trans. – 19

15CrMo

441 – 637

235

long. – 21,
trans. – 20

15MnSi

490

294

long. – 18,
trans. – 16

12Cr18Ni12Ti

539 – 686

215 – 392

35

Chemical Composition (%, max)

Steel Grade

C

Si

Mn

Cr

Ni

Mo

S

P

Cu

Va

20

0,17-0,24

0,17-0,37

0,35-0,65

0,25

0,25

-

0,03

0,025

0,3

-

20-PV

0,17-0,24

0,17-0,37

0,35-0,65

0,25

0,25

-

-

0,03

0,3

-

12Cr1MoV,
12Cr1MoV-PV

0,10-0,15

0,17-0,37

0,40-0,70

0,9-1,2

0,25

0,25-0,35

0,025

0,025

0,2

0,15-0,30

15MnSi

0,11-0,18

0,17-0,37

0,40-0,70

0,8-1,1

0,3

0,40-0,55

0,025

0,025

0,3

-

12Cr18Ni12Ti

0,12

0,80

1-2

17-19

11-13

-

0,020

0