Heat Exchanger tubes are used for cooling, heating or re-heating of gases or fluids in a wide range of industries like ( petro-)chemical, power generation, pharmaceutical and nuclear industry.
Unidus is leading manufacturer, supplier and expoerter of seamless heat exchanger tubes / condenser tubes in highest quality.
Thanks to our in-house bending facility, we can supply our heat exchanger / condenser tubes as U tube with quick delivery and cost-effective rates. Here you get more information on U-tubes
We can offer a wide range of grades and sizes.
Dimensions of heat exchanger tubes:
Outer Diameter(OD) : 0.5″~4″(12.7mm~114.3mm)
Wall Thickness(WT) :0.035″~0.4″(0.89mm~10.16mm)
Lengths and fixed lengths on request
Non-ferrous
Standards
ASTM B 43
ASTM B 68
ASTM B 75
ASTM B 88
ASTM B 111
ASTM B 315
ASTM B 395
ASTM B 466
ASTM B 543
ASTM B 210
ASTM B 234
ASTM B 241
Non Ferrous Grades
Aluminium Brass,
Admiralty Brass,
Copper Nickel 90/10
Copper Nickel 70/30
Copper Nickel Iron Manganese 66/30/2/2
Aluminium and Aluminium Alloys
(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 – 2500 kg.
Testing of heat exchanger tubes
– prescribed mechanical tests,
– leak tightness test by eddy current,
– hydrostatic testing,
– ultrasound testing.
Certified test reports for heat exchanger tubes
ASTM / ASME A450
EN 10204: for EN 10297 non specified testing (only the mandatory tests), 2.2
specified testing – 3.1.B
after agreement – 3.1.A, 3.1.C, 3.2
DIN 50049, – 2.2, 3.1. B
Straightness of heat exchanger tubes
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.
Condition of delivery and surface of tubes
Tubes are supplied according to agreed standards. The cold drawn tubes after the final forming go through thermal processing in shielding gas – normalizing.
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 plug
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