Cr25Ni35 U-Shaped Radiant Tube – Ø124 × Ø108 × 1597 mm

Product Specification

Cr25Ni35 U-Shaped Radiant Tube for Industrial Furnaces
Size: Ø124 × Ø108 × 1597 mm | High-Cr High-Ni Heat-Resistant Alloy | Custom Furnace Radiant Tube

FH® Alloy manufactures Cr25Ni35 U-shaped radiant tubes for industrial furnaces and heat treatment equipment.

This customized radiant tube is manufactured from Cr25Ni35 high-chromium, high-nickel heat-resistant alloy, with a tube size of Ø124 × Ø108 × 1597 mm (OD × ID × L).

The U-shaped configuration provides a long radiant heating path within a compact furnace installation space. This product can also be supplied as a complete assembly with insulation blocks, mounting plate, and customized installation components according to furnace design.

Product Specifications

Dimensions
This Cr25Ni35 radiant tube is manufactured with the following tube dimensions:
Ø124 × Ø108 × 1597 mm
OD: Ø124 mm
ID: Ø108 mm
Nominal Wall Thickness: 8 mm
Length: 1597 mm

Other structural dimensions such as center distance, bend radius, mounting plate size, insulation block dimensions, and installation hole positions can be customized according to the customer’s furnace drawing.For replacement projects, FH® Alloy can manufacture according to existing drawings, samples, or measured dimensions.

Cr25Ni35 Heat-Resistant Alloy
Cr25Ni35 is a high-chromium, high-nickel heat-resistant alloy used for components exposed to demanding furnace environments.

For radiant tube applications, the material offers useful characteristics such as:

• Good resistance to high-temperature oxidation
• High-temperature structural stability
• Suitable performance under repeated heating and cooling
• Good resistance to thermal degradation in furnace service
• Suitable for long-term industrial heating applications when correctly matched to the furnace conditions

Actual service life depends on operating temperature, furnace atmosphere, burner conditions, thermal cycling frequency, and tube design.

U-Shaped Radiant Heating Structure
The U-shaped structure consists of two parallel tube sections connected by a return bend.
Compared with a simple straight radiant tube, this configuration allows a longer heating path to be installed within a relatively compact furnace area.

The design is suitable for applications requiring:

• Indirect furnace heating
• Controlled furnace atmosphere
• Reduced direct flame contact
• Stable radiant heat transfer
• Compact installation
• Customized furnace integration

Insulation Block & Mounting Assembly
As shown in this product configuration, the lower section of the radiant tube can be supplied together with high-temperature insulation blocks and a mounting base plate.
This integrated assembly can help simplify furnace installation and provide a more complete replacement solution.

The following components can be customized as part of the assembly:

• Insulation block dimensions
• Mounting plate size
• Mounting hole positions
• Tube spacing
• Support structure
• Connection interface
• Installation height

This is particularly useful for OEM furnace projects and replacement of existing radiant tube assemblies.

Typical Applications
Cr25Ni35 U-shaped radiant tubes can be customized for heat treatment furnaces, annealing furnaces, hardening furnaces, tempering furnaces, continuous furnaces, roller hearth furnaces, protective-atmosphere furnaces, steel processing lines, and other industrial heating equipment.
They are particularly suitable for applications requiring high-temperature indirect heating and a compact U-shaped installation arrangement.

Manufacturing Process
Depending on the engineering drawing, the production process can include:
Material Preparation → Tube Fabrication → Bend/Elbow Preparation → Assembly → Welding → Mounting Plate Fabrication → Insulation Assembly → Dimensional Inspection → Surface Cleaning → Final Inspection
For this type of U-shaped radiant tube, key manufacturing controls include tube diameter, wall thickness, straightness, center distance, bend geometry, weld quality, mounting alignment, and overall dimensional accuracy.

Product Advantages

• Cr25Ni35 heat-resistant alloy
• Ø124 × Ø108 × 1597 mm customized tube size
• U-shaped structure for compact furnace installation
• Nominal 8 mm tube wall
• Good high-temperature oxidation resistance
• Custom insulation block and mounting plate
• Drawing-based OEM manufacturing
• Suitable for new furnace and replacement projects
• Custom dimensions available

Quality Control
Depending on customer requirements, FH® Alloy can perform material verification, chemical composition analysis, dimensional inspection, wall thickness measurement, visual inspection, weld inspection, center-distance inspection, mounting plate inspection, and final assembly inspection.

Special inspection requirements can be confirmed before production.

Why Choose FH® Alloy?
FH® Alloy specializes in customized heat-resistant alloy components for industrial furnaces and heat treatment equipment.

Our radiant tube range includes U-shaped radiant tubes, P-type radiant tubes, I-type radiant tubes, straight radiant tubes, gas-fired radiant tubes, special-shaped radiant tubes, and custom furnace tube assemblies.

We support OEM manufacturing, drawing-based production, replacement manufacturing, and material selection according to actual furnace operating conditions.

Request a Quote
For a quotation for a Cr25Ni35 U-shaped radiant tube, please provide the product drawing together with tube diameter, wall thickness, overall dimensions, center distance, bend radius, operating temperature, furnace atmosphere, mounting requirements, and quantity.

Send your drawing or existing radiant tube specifications to FH® Alloy for technical review and quotation.

FAQ
Q1: Can you manufacture Ø124 × Ø108 × 1597 mm U-shaped radiant tubes?
Yes. This specification can be manufactured in Cr25Ni35, and dimensions can also be adjusted according to your furnace design.

Q2: Is the wall thickness 8 mm?
Based on an outside diameter of Ø124 mm and inside diameter of Ø108 mm, the nominal radial wall thickness is 8 mm.

Q3: Can the center distance and U-bend dimensions be customized?
Yes. Center distance, bend radius, tube spacing, overall height, and mounting dimensions can all be manufactured according to the customer's drawing.

Q4: Can you supply the insulation block and mounting plate together?
Yes. FH® Alloy can supply the radiant tube as a complete assembly with customized insulation blocks, mounting plates, and related installation components.

Q5: Can this be used as a replacement radiant tube?
Yes. Replacement production can be based on the original drawing, sample, photos, or measured dimensions.