Sizes of seamless steel tubes

The seamless tubes form important part of all types of steel structures, and are used mainly in building, power and mining industries.


Dimensions and weights of seamless tubes according to standards EN, DIN, BS, UNI, NFA, STN, ČSN, GOST, PN-H

– outside diameter x wall thickness (OD x WT):
  • 10.2 x 0.5 – 139.7 x 16.0 mm
– application:
  • – line pipe *
  • for heat exchangers *
  • for high-pressure service – boiler *
  • for low temperature pressure services *
  • for mechanical treatment – machine parts and general use *
  • for room temperature pressure service *
  • for structural purposes *
  • from fine grain steel *
  • suitable for welding or threading *

Dimensions of seamless tubes according to standards GOST

– outside diameter x wall thickness (OD x WT):
  • 20.0 x 2.5 – 140.0 x 16.0 mm
– application:
  • for high-pressure service – boiler *
  • for mechanical treatment – machine parts and general use *
  • for room temperature pressure service *
  • for structural purposes *

Dimensions and weights of seamless tubes according to standard ANSI/ASME B36.10M

– outside diameter x wall thickness (OD x WT):
  • 10.3 x 1.24 – 114.3 x 13.49 mm [0.405 x 0.049 – 4.500 x 0.531 in] [1/8 – 4 NPS]
– application:
  • for heat exchangers *
  • for high-pressure service – boiler *
  • for low temperature pressure services *
  • for mechanical treatment – machine parts and general use *
  • for room temperature pressure service *
  • suitable for welding or threading *

Dimensions and weights of seamless tubes according to standard ASTM A450/A450M

– outside diameter x wall thickness (OD x WT):
  • 31.75 x 2.34 – 139.7 x 12.7 mm [1.250 x 0.088 – 5.500 x 0.500 in] [13 – 7/0 GA]
– application:
  • for high-pressure service – boiler *
  • for low temperature pressure services *
  • for mechanical treatment – machine parts and general use *

Dimensions and weights of steel tubes according to standard JIS (tubes)

– outside diameter x wall thickness (OD x WT):
  • 15.9 x 1.2 – 114.3 x 9.5 mm
– application:
  • for heat exchangers *
  • for high-pressure service – boiler *
  • for mechanical treatment – machine parts and general use *
  • for standard use *

Dimensions and weights of steel tubes according to standards JIS (pipes)

– outside diameter x wall thickness (OD x WT):
  • 10.5 x 1.7 – 114.3 x 9.5 mm
– application:
  • for high-pressure service – boiler *
  • for pressure hydraulic and pneumatic lines – HPL *
  • for room temperature pressure service *

Dimensions of pipes for threading according to EN 10 255

– outside diameter x wall thickness (OD x WT):
  • 9.8 x 2.0 – 113.1 x 5.40 mm [1/8 – 4 NPS] [6 – 100 DN]
– application:
  • suitable for welding or threading *

Dimensions of line pipes

– outside diameter x wall thickness (OD x WT):
  • 10.3 x 1.7 – 114.3 x 13.49 mm [0.405 x 0.068 – 4.500 x 0.531 in] [1/8 – 4 1/2 NSD]
– application:
  • – line pipe *

Dimensions of casing and tubing

– outside diameter x wall thickness (OD x WT):
  • 26.7 x 2.87 – 114.3 x 8.56 mm [1.050 x 0.113 – 4.500 x 0.337 in]
– application:
  • – casing and tubing *

Contact us

Are you interested in cooperation? Send us an inquiry, or order the goods directly from stock.

Download the Product portfolio of steel tubes

+421 48 6451111

Ask for quote