Titanium heat exchangers

OFF SHORE APPLICATIONS

RSW FLOODED SYSTEM (Water boxes in CuNi90-10)

NH3 CONDENSERS

RSW FLOODED SYSTEM (Water boxes in CuNi90-10)

Titanium tubes are used in heat transfer applications where fluids may produce corrosion like sea water and brackish water. Titanium has a high corrosion fatigue limit, and it is resistant to erosion and biological attack.

The tubes material is Titanium grade 2, and the carbon steel tube plates are cladded by explosion welding with Titanium grade 1, tube plates are in CS cladded with Titanium and water boxes in CuNi90/10. The tubes are welded to the tube plates by TIG ORBITAL welding process. This tube to tube plate design avoids the corrosion produced when the tubes are only expanded to the tube plates. INTEGASA guarantees the tube to tube plate joint for five years.

INTEGASA designs our equipment with suitable velocities to reduce the fouling factor and to create a self-cleaning effect.

Our standard delivery is eight weeks. Six POLYSOUDE welding machines and our stock of Titanium tubes and Titanium cladded tube plates allow our fast deliveries.

Some examples of Titanium heat exchangers are NH3 condensers, RSW coolers, Spray chillers and Oil coolers. These Titanium heat exchangers are used mainly in marine, Offshore and Oil and gas sectors. Thermal & Mechanical design is done by INTEGASA.

Tube to tube plate joint

In titanium heat exchangers

Titanium has the advantages of high specific strength, high temperature creep resistance and corrosion resistance. It is mainly used in engineering in harsh environments, such as petrochemical, sea water applications, nuclear plants and other fields.

INTEGASA has delivered titanium heat exchangers in chemical (DOW CHEMICAL, INEOS, etc.), petrochemical (BRITISH PETROLEUM, SHELL, TOTAL, etc.) and marine, with hundreds of references in tuna ships, trawlers, etc.

TUBE TO TUBE PLATE JOINT

The execution of the tube-to-tube plate joint for titanium and duplex tubes required for SHELL, DOW CHEMICAL, etc. is expanded + welded (seal welded for titanium and strength welded for duplex tubes). In all the chemical and petrochemical specs, rolling the titanium tubes without welding is not allowed.

There are two reasons for this:

Ti is soft and has a low modulus of elasticity resulting in a deficient pullout strength test. Even with a small difference in temperatures or pressures between the tube and the shell side, an expanded joint would not be strong enough to bear the joint.

When the tubes are expanded, there is an interstice in the tube-to-tube plate joint. Crevice corrosion may appear in interstices where the sea water is trapped and not renewed.

These two risks disappear when the titanium tubes are light expanded and seal welded to the tube plates.

CONCLUSIONS

To weld the titanium tubes guarantees that all the parts in contact with the sea water are in titanium.
There is no objective reason for just rolling the titanium tubes leaving a possible leak path.
The tubes may always be plugged if there is a hypothetical leak in a seal welded joint.
INTEGASA gives 5 years of guarantee in the tube-to-tube plate joint.

Titanium has the advantages of high specific strength, high temperature creep resistance and corrosion resistance. It is mainly used in engineering in harsh environments, such as petrochemical, sea water applications, nuclear plants and other fields.

TUBE TO TUBE PLATE JOINT

ENGINEERING & MANUFACTURING