Place of Origin:
China
Brand Name:
FH®
Certification:
ISO 9001, ISO14001
Model Number:
FH 3031
Closed-End Straight Radiant Tube for Industrial Furnaces
Custom Round-Flange Radiant Tube Assembly with Extended Inner Connection Tube | FH® Alloy
FH® Alloy manufactures closed-end straight radiant tubes for industrial furnaces and heat treatment equipment, providing custom solutions for customers who require indirect heating, stable installation, and customized end connection structures.
Compared with standard straight radiant tubes, this type features a closed-end cylindrical tube body, a round mounting flange, and an extended inner connection tube / guide tube structure, making it suitable for certain furnace layouts and burner system designs.
This product can be customized according to customer drawings, furnace structure, operating conditions, and connection requirements.
Product Overview
The closed-end straight radiant tube is designed for furnace systems where the heating medium or burner-related structure needs to be connected from one end, while the main tube body provides the radiant heating section inside the furnace.
From the product shown, this type of radiant tube assembly typically includes:
This makes it different from ordinary straight tubes with only simple flange ends.
Typical Specifications
| Item | Description |
| Product Name | Closed-End Straight Radiant Tube |
| Product Type | Straight Radiant Tube Assembly |
| Structure | Straight Cylindrical Tube with Closed End |
| End Connection | Extended Inner Tube / Guide Tube |
| Flange Type | Round Flange |
| Material | Heat-Resistant Stainless Steel / High-Temperature Alloy / Nickel-Based Alloy |
| Tube Outside Diameter | Customized |
| Wall Thickness | Customized |
| Overall Length | Customized |
| Flange Size | Customized |
| Connection Tube Size | Customized |
| Manufacturing | Fabrication / Welding / Machining |
| Application | Industrial Furnace / Heat Treatment Furnace |
| Customization | OEM / Drawing-Based Manufacturing |
| Manufacturer | FH® Alloy |
Key Features
Closed-End Tube Structure
The radiant section is formed by a closed-end cylindrical tube body, suitable for specific indirect heating system designs.
Extended Inner Connection Tube
The end connection tube can be customized according to the burner system, air/gas flow path, or equipment design.
Round Flange Mounting
The round flange provides stable installation and can be machined according to the furnace interface dimensions.
Reinforced End Construction
The end connection area can include reinforcing ribs or support structures for improved assembly stability.
OEM & Replacement Manufacturing
Suitable for both new furnace projects and replacement of existing radiant tubes.
Structural Difference from Standard Straight Radiant Tubes
To distinguish this product from other straight radiant tube models, this version can be described as a:
Closed-End Straight Radiant Tube Assembly with Extended Inner Tube
Compared with the previous two straight-type versions:
This makes the product page more differentiated and reduces repetition across similar radiant tube pages.
Material Options
Material selection depends on the actual furnace operating conditions.
FH® Alloy can supply this type of straight radiant tube in different materials, including:
Material selection should consider:
Dimensions & Custom Parameters
All dimensions can be customized according to customer drawings or furnace requirements.
Typical dimensional parameters include:
Drawing Reference
OD = Outside Diameter
WT = Wall Thickness
L = Overall Length
FD = Flange Diameter
FT = Flange Thickness
CT = Connection Tube Diameter
CL = Connection Tube Length
All dimensions can be manufactured according to customer drawings, samples, or measured data.
Typical Applications
This type of closed-end straight radiant tube can be customized for use in:
It is especially suitable for furnace systems requiring:
Manufacturing Process
Depending on the design, manufacturing may include:
Material Preparation → Tube Forming / Rolling → End Cap Fabrication → Connection Tube Machining → Flange Machining → Assembly → Welding → Reinforcement Installation → Dimensional Inspection → Surface Cleaning → Final Inspection
Key manufacturing controls include:
These details are important for proper installation and long-term furnace service.
Product Advantages
Quality Control
Depending on customer requirements, inspection can include:
Additional inspection requirements can be confirmed before production.
Why Choose FH® Alloy?
FH® Alloy specializes in custom heat-resistant alloy furnace components for industrial heating and heat treatment applications.
Our radiant tube product range includes:
We also manufacture:
We support OEM production, drawing-based manufacturing, and replacement production for international customers.
Request a Quote
If you need a custom closed-end straight radiant tube, please send us:
Send your drawing to FH® Alloy for technical review and quotation.
FAQ
Q1: Can you manufacture this type of closed-end straight radiant tube according to our drawing?
Yes. FH® Alloy supports custom manufacturing based on drawings, samples, and dimensional information.
Q2: What makes this product different from a standard straight radiant tube?
This version features a closed-end tube body and an extended inner connection tube, making it structurally different from common straight tubes with simple flange ends.
Q3: Can the round flange and inner tube dimensions be customized?
Yes. Flange diameter, flange thickness, hole pattern, connection tube diameter, and connection length can all be customized.
Q4: What materials are available?
We can provide 1.4848, 1.4849, 1.4852, 2.4879, heat-resistant stainless steels, high-Ni alloys, and other suitable grades.
Q5: Can you produce replacement tubes for existing furnaces?
Yes. We can manufacture replacement radiant tubes based on old drawings, product photos, samples, or measured dimensions.
Send your inquiry directly to us
