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Help CenterHeat Resistant Radiant Tube for Continuous Annealing Line
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heat resistant radiant tube for continuous annealing line
The various radiant tubes made by HEXIN are normally for continuous strip processing furnaces of steel mills, like U shaped, W shaped, P , double P shaped ,customized shape, tube temperatures up to 1250°C, according to the furnace design.
Materials
two first legs and two first elbows:
ZGCr25Ni35Nb, ZGCr28Ni48W5, HK40, HT, HU, HH, 22H, More1, More2, KHR35H
two last legs and last elbow:
HPNb, ZG40Cr25Ni20Si2
support: GX40Cr25Ni20
flanges: SGC25
Process
Legs is centrifugal casted and machined subsequently.
Elbows will be made by static casting or precision casting.
Support be made by precision casting.
Flange will be forged, welded and machined according to relevant drawings.
Property
characteristic of heat resistance and excellent creep srtength
Welding consumables
Similar to or higher than base material
or as per the buyer's requirements
Inspection
The most generally used methods of testing given below:
Chemical analysis by Spectrometer
Mechanical tests in Normal and High temperature.
Ultrasonic, X-ray, Dye Penetrant Test.
Boroscope; Eddy current testing; Microscope ; Pressure tests.
Application
1. heat resistant alloy radiant tubes are mainly used
in petrochemical, Metallurgical, steel and heat resistant industries.
2. corrosion resistant alloy radiant tubes are used
in pulp and paper, chemical and other petrochemical industries.
3. super-alloys radiant tubes are
used in high strength, carburization resistance industry.
Working temperature
depending on the materials (max 1250°C)
Taking energy efficiency and NOx emissions into consideration, the W shaped radiant tube and U shaped RT is more efficient and reliable. At the current energy price level, additional expenses for more efficient radiant tube systems can be recovered in a few years. Including the other advantages, such as increased production, less downtime, temperature uniformity, flame safety and better tube life-time, the payback period for these systems can be reduced considerably.
The radiant tubes are made from NiCr alloy tubes, by centrifugal casting/spun casting tube with investment casting elbow, machining the inside holes,hydraulic pressure testing, welding and a series of NDT testling, like PT, RT. To increase the service life of radiant tubes, we select only the 100% new raw material to guarantee the physical properties of the tubes. We can supply complete ready-to-install assemblies according to customer specification. We also provided as cast tubes, welded tubes, welding of flanges and casings with fiber blankets, bottom distance spacers, etc.,
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