ASME SB163 UNS N04400 MONEL 400 Finned Tube For Heat Exchanger
SB 163 N04400 Nickel based ASME SB 163 UNS N04400 pipe is known for
its resistant to seawater and steam at high temperaturesas.
Technical Details/Base Tube Details
Tube Diameter : 20 mm OD Min to 219 mm OD Max.
Tube Thickness : Minimum 2 mm up to 16mm
Tube Material : Carbon Steel, Stainless Steel, Alloy Steel, Corten
steel, duplex Steel, Super Duplex Steel, Inconel, High Chrome High
Nickle & Incolloy, CK 20 material and some other material.
Fins Thickness : Min. 0.8 mm to Max. 4 mm
Fins Height : Min 0.25” (6.35 mm) To Max.1.5” (38 mm)
Fin Density : Min 43 Fins Per Meter To Max. 287 Fins Per Meter
Material : Carbon Steel, Stainless Steel, Alloy Steel, Corten
steel, Duplex Steel and Incolloy.
For a rapid quotation, plz send with following requirement:
Number of pieces,
base tube: Diameter, thickness, length and material specification.
Fins: material specification, type (solid or serrated), height,
thickness, spacing, finned length and unfinned sections. Weld prep
details if required.
Delivery period required.
About Monel 400
Monel belongs to a group of nickel alloys. The Monel 400 Tube is produced with high concentrations of copper and chromium in
their chemical composition. These tubes are designed to suffice in
corrosion stress-induced environments. They don’t easily dissociate
or deform under any temperatures. The SB 163 N04400 grade is designed with superior strength and excellent mechanical
properties. They possess a minimum tensile strength of 550Mpa and a
minimum yield strength of 240Mpa. The products from this grade can
be easily elongated by 40%.
Monel 400 is a nickel-copper alloy (about 67% Ni – 23% Cu) that is resistant
to sea water and steam at high temperatures as well as to salt and
caustic solutions. Alloy 400 is a solid solution alloy that can
only be hardened by cold working. This nickel alloy exhibits
characteristics like good corrosion resistance, good weldability
and high strength. A low corrosion rate in rapidly flowing brackish
or seawater combined with excellent resistance to stress-corrosion
cracking in most freshwaters, and its resistance to a variety of
corrosive conditions led to its wide use in marine applications and
other non-oxidizing chloride solutions.
|Monel 400||0.30 max||2.00 max||0.50 max||0.24max||28.0-34.0||2.50 max||63.00 min||–|
|Element||Density||Melting Point||Tensile Strength||Yield Strength (0.2%Offset)||Elongation|
|Monel 400||8.8 g/cm3||1350 °C (2460 °F)||Psi – 80,000 , MPa – 550||Psi – 35,000 , MPa – 240||40 %|
|Density||8.8 gm/cm3||0.318 lb/in3|
|Wall Thickness of Tube (inches)|
|Working Pressure (psig)|
Advantage of Fin Tube:
Transferring heat from a hot fluid into a colder fluid through a
tube wall is the reason many of us use finned tubes. But you may
ask, what is the major advantage of using a finned tube? Why can’t
you just use a regular tube to make this transfer? Well you can but
the rate will be much slower.
By not using a finned tube the outside surface area is not
significantly greater than the inside surface area. Because of
that, the fluid with the lowest heat transfer coefficient will
dictate the overall heat transfer rate. When the heat transfer
coefficient of the fluid inside the tube is several times larger
than that of the fluid outside the tube the overall heat transfer
rate can be greatly improved by increasing the outside surface area
of the tube.
Finned tubes increase outside the surface area. By having a finned
tube in place, it increases the overall heat transfer rate. This
then decreases the total number of tubes required for a given
application which then also reduces overall equipment size and can
in the long-run decrease the cost of the project. In many
application cases, one finned tube replaces six or more bare tubes
at less than 1/3 the cost and 1/4 the volume.
For applications that involve the transfer of heat from a hot fluid
to a colder fluid through a tube wall, fin tubes are used. Usually,
for an air heat exchanger, where one of the fluids is air or some
other gas, the air side heat transfer coefficient will be much
lower, so additional heat transfer surface area or a fin tube
exchanger is very useful. The overall pattern flow of a finned tube
exchanger is often crossflow, however, it can also be parallel flow
Fins are used to increase the effective surface area of heat
exchanger tubing. Furthermore, finned tubes are used when the heat
transfer coefficient on the outside of the tubes is appreciably
lower than that on the inside. In other words, heat transferred
from liquid to gas, vapor to gas, such as steam to air heat
exchanger, and thermic fluid to air heat exchanger.
1. Marine engineering.
2. Chemical and hydrocarbon processing equipment.
3. Gasoline and freshwater tanks.
4. Crude petroleum stills.
5. De-aerating heaters.
6. Boiler feed water heaters and other heat exchangers.
7. Valves, pumps, shafts, fittings, and fasteners.
8. Industrial heat exchangers.
9. Chlorinated solvents.
10. Crude oil distillation towers.