Seamless tubes for heat exchangers


Heat exchanger tubes are made using the cold rolling process and the semi-finished product for these are used rolled steel tubes.

Heat exchanger tubes are used in energy and chemical industry for heating the buildings, water etc. The heat exchanger tubes make it possible to transfer thermal energy from one media to another. The heat transfer may be linked with phase transformation of the media.

Seamless tubes for heat exchangers


Dimensions of heat exchanger tubes

OUTER DIAMETER (OD)16,0 mm – 51,0 mm
(according to DIN 28180)

12,7 mm – 76,2 mm
(1/2 inch – 3 inch)
(according to  ASTM A179)

The tubes for the heat exchangers may be supplied also in compliance with other standards starting with 4 mm.

EUROPEAN STANDARDSDIN 28180,
EN 10 216
AMERICAN STANDARDSASTM A/SA 179
Dimensional standard SIZES (OD x WT) Dimensional table
EN10216-2 (10220)10.2 x 0.5 – 139.7 x 16.0 mm
GOST10604.0 x 0.5 – 125.0 x 13.0 mm
DIN2391-14.0 x 0.5 – 125.0 x 13.0 mm
DIN2818016.0 x 1.2 – 51 x 5 mm
BS36064.0 x 0.5 – 125.0 x 13.0 mm
ČSN42 67104.0 x 0.5 – 125.0 x 13.0 mm
ČSN42 67114.0 x 0.5 – 125.0 x 13.0 mm
NF A49-2154.0 x 0.5 – 125.0 x 13.0 mm
GOST87344.0 x 0.5 – 125.0 x 13.0 mm
ASTMA16112.70 x 0.89 – 76.20 x 5.59 mm [0.500 x 0.035 – 3.000 x 0.220 in] [20 – 5 BWG]
ASTMA17912.70 x 0.89 – 76.20 x 5.59 mm [0.500 x 0.035 – 3.000 x 0.220 in] [20 – 5 BWG]
ASTMA19912.70 x 0.89 – 76.20 x 5.59 mm [0.500 x 0.035 – 3.000 x 0.220 in] [20 – 5 BWG]
ASTMANSI B36.1010.3 x 1.24 – 114.3 x 13.49 mm [0.405 x 0.049 – 4.500 x 0.531 in] [1/8 – 4 NPS]
JISG346115.9 x 1.2 – 114.3 x 9.5 mm
JISG346215.9 x 1.2 – 114.3 x 9.5 mm
UNIISO 11294.0 x 0.5 – 125.0 x 13.0 mm

Types of steel for heat exchanger tubes

EN 10216-2P235GH
DIN 1629St 37.0
DIN 17175St35.8, 15Mo3
DIN 17173TTSt35N
ASTM A179A179
ASTM A 161Grade C, Grade T-1
ASTM A 335Grade T12

Standard TDC Steel grade (open product)
ČSN42 0251
ČSN42 0251
ČSN42 0251
ČSN42 0251
ČSN42 0251
ČSN42 0251
ČSN42 0251
ČSN42 0251
ČSN42 0251
ČSN42 0251
ČSN42 0251
ČSN42 0251
ČSN42 0251
ČSN42 0251
STN42 0251
NF A49-215
STN42 0251
NF A49-215
STN42 0251
BS3606
STN42 0251
GOST1060 / 1050
DIN17175
BS3606
STN42 0251
STN42 0251
NF A49-215
STN42 0251
UNI5462
STN42 0251
GOST550 / 4543
STN42 0251
DIN17175
GOST550 / 1050
STN42 0251
BS3606
STN42 0251
STN42 0251
STN42 0251
NF A49-215
BS3606
GOST550 / 1050
BS3606
DIN1629
STN42 0251
NF A49-215
DIN17173
DIN1629
DIN17175
DIN17175
ASTMA179/A450
ASTMA199/A450
ASTMA161/A450
ASTMA199/A450
ASTMA161/A450
JISG3462
JISG3461
JISG3461
JISG3462
JISG3461
ASTMA335/A530
EN10216-2
EN10216-2

Surface protection of heat exchanger tubes

The inner and outer surface is protected by a light oil application.

Upon request it may be protected with and easy removable oil application on the outer side.

The tube ends may be enclosed by a plag.


Testing of heat exchanger tubes

(a) prescribed mechanical tests,
(b) leak tightness test by eddy current,
(c) hydrostatic testing,
(d) ultrasound testing.

Ends of heat exchanger tubes

The ends are vertical to the longitudinal axis and are without burrs.
The ends are vertical to the longitudinal axis and are without burrs.

Tubes length destined of heat exchanger tubes

Upon request the heat exchanger tubes may be supplied in length up to 20 meters.

Packaging of heat exchanger tubes

(a) tubes bound with a steel band that has a paper underneath
(b) tubes wrapped in plastic sheets, burlap,
(c) tubes in wooden crates.

The tubes are supplied in packages with a circular or hexagonal outline with having weight of 300 – 3 500 kg.

Packaking-STANDARD-tubes bound with a steel band
Packaking-STANDARD-tubes bound with a steel band
Packaking-STANDARD-bundle tied down by steel strap underlaid by paper
Packaking-STANDARD-bundle tied down by steel strap underlaid by paper
Packaking-STANDARD-PLUS-paper tape and polyethylene foil
Packaking-STANDARD-PLUS-paper tape and polyethylene foil
Packaking-STANDARD-PLUS-the bundle placed into a wooden box
Packaking-STANDARD-PLUS-the bundle placed into a wooden box
Packaking-PREMIUM-B-into a wooden box in which the tubes are wrapped in foil
Packaking-PREMIUM-B-into a wooden box in which the tubes are wrapped in foil
Packaking-PREMIUM-C-the bandles are wraped into and plastic foil
Packaking-PREMIUM-C-the bandles are wraped into and plastic foil
Packaking-PREMIUM-D-placing the whole shipment into foil+vacuum sealed
Packaking-PREMIUM-D-placing the whole shipment into foil+vacuum sealed

Markings of the tubes and tube bundles

(a) Tubes are marked by spraying the agreed upon data.
(b) Tube bundles are marked with labels with the agreed upon data.

Marked by a label
Marked by a label
Marked with spray either by a white or black color using InkJet
Marked with spray either by a white or black color using InkJet
Marked by stamping the data
Marked by stamping the data

ASTM/ASME A450,
EN 10204: for EN 10297
(a) nonspecified testing (only the mandatory tests), 2.2
(b) specified testing – 3.1.B
(c) after agreement – 3.1.A, 3.1.C, 3.2
DIN 500492.2 or 3.1.B.


Straightness deviation for the whole length of a tube L can not exceed value of 0.0015 x L.

In conversion to the 1 meter length it can not exceed 3 mm.

Tubes are supplied according to agreed standards.

The cold drawn tubes after the final forming go through thermal processing in shielding gas – normalizing.



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