s the name suggests a bimetallic tube comprises of two disparate materials. Typically the inner metal tends to be an alloy that has good corrosion resistance. For instance, alloys of titanium, copper or even aluminium-brass could be used as the inner coat. Whereas the outer metal layer is an alloy with high resistance to stress such as stainless steel, titanium or carbon steel. It is, however, possible for bimetallic tube manufacturers to fabricate bimetallic products with the combination of any material.
In applications where the components are exposed to high pressures and corrosive conditions, the use of bimetallic finned tubes sanctions a considerable economical savings, especially if compared to a tube composed of a single alloy, because the use of precious elements is kept to the minimum during its production. Industries like the chemical, petrochemical, as well as the food processing and refrigeration industries, use the bimetallic heat exchanger tubes for the transference of heat. Since this tube is both stress resistant and has good corrosion resistance, it is able to withstand elevated temperatures. Furthermore, the appropriate alloy selected for heat exchangers in nuclear, electric, thermal and geothermal power plants proves to deliver an efficient service and the Bimetallic Tubes having a longer life. At many industries, there are several inspections carried out to check the integrity of the tube. Generally, tests such as Chemical Composition, Boroscopic Inspection, Mechanical Properties, Pneumatic Test, Hydrostatic Test, Pulling Test and an Eddy Current Test are commonly administered to the bimetallic composite tube
Standard Dimensions - Bimetallic Tubes | ||||||||||||||||||||||||
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Outside Diameter | Outside Thickness | Inner Thickness | Length | Ferrule Length | ||||||||||||||||||||
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Materials - Bimetallic Tubes | ||
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Outer Tube | Inner Tube | Ferrules |
SA 179 / A 179 - Carbon Steel SA 214 / A 214 - Carbon Steel SA 213 / A 213 - Stainless Steel SA 312 / A 312 - Stainless Steel SB 111 / B 111 - Copper & Cu Alloys SB 523 / B523 - Zirconium & Zr Alloys SB 338 / B338 - Titanium & Ti Alloys |
SA 179 / A 179 - Carbon Steel SA 214 / A 214 - Carbon Steel SA 213 / A 213 - Stainless Steel SA 312 / A 312 - Stainless Steel SB 111 / B 111 - Copper & Cu Alloys SB 523 / B523 - Zirconium & Zr Alloys SB 338 / B338 - Titanium & Ti Alloys |
SA 179 / A 179 - Carbon Steel SA 214 / A 214 - Carbon Steel SA 213 / A 213 - Stainless Steel SA 312 / A 312 - Stainless Steel SB 111 / B 111 - Copper & Cu Alloys SB 523 / B523 - Zirconium & Zr Alloys SB 338 / B338 - Titanium & Ti Alloys |