TU 14-3R-197-2001

TU 14−3R-197−2001 / TU 14−3-197−89

Seamless pipes made of corrosion-resistant steel with improved surface quality

Outside diameter: 6 — 159 mm

(up to 25 mm with a step of 1 mm; further: 27; 28; 30; 32; 34; 36; 38; 40; 42; 45; 48; 50; 51; 53; 54; 56; 57; 60; 63; 65; 68; 70; 73; 75; 76; 80; 83; 85; 89; 95; 102; 108; 114; 121; 127; 133; 140; 146; 152; 159)

Wall thickness: 1 -25 mm

(1; 1.2; 1.4; 1.5; 1.8; 2; 2.2; 2.5; 2.8; 3; 3.5; 4; 4.5; 5; 5.5; 6; 6.5; 7; 7.5; 8; 8.5; 9; 9.5; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20; 22; 25)

Manufacturing accuracy: normal and high

Limit deviations:

by diameter

D 6 — 15 mm ± 0.2 mm

D 16 — 30 mm: normal accuracy ± 0.3 mm; increased accuracy ± 0.25 mm

D 32 — 50 mm: normal accuracy ± 0.45 mm; increased accuracy ± 0.4 mm

D 51 — 68 mm: normal accuracy ± 0.8%; increased accuracy ± 1%

D 70 — 140 mm: typical accuracy ± 1.25%

D 146 — 159 mm: normal accuracy ± 1.25%; increased accuracy ± 1%

Notes:

1. Steel grade — 08Х18Н10Т

2. The chemical composition of steel must comply with GOST 5632−72

3. Limit deviations in wall thickness:

• with a wall thickness of 1 to 1.8 mm incl. — ± 15%
• with a wall thickness of St. 2 to 5 mm incl. -
• for diameters up to 50 mm — usual accuracy — + 12.5%; -ten%; increased — ± 10%.
• with a wall thickness of St. 2 to 5 mm incl. -
• for diameters over 50 mm — usual accuracy — ± 12.5%; increased accuracy — ± 10%
• with a wall thickness over 5 mm — ± 12.5%.

4. Pipes with an inner diameter of less than 10 mm with an electrochemically polished inner surface and an outer diameter of more than 75 mm with an electrochemically polished outer surface are not supplied

5. Pipes with a diameter of up to 89 mm inclusive are manufactured cold-deformed

6. Pipes with a diameter of 76 — 159 mm are made hot-deformed

7. Pipes with diameters of 121 — 146 mm can be made with turned outer and bored inner surfaces.

At the request of the consumer, the pipes are supplied with the mark «For NPP» and accepted by the inspection of the RF Gosatomnadzor.