Name: China Radiant Tube Manufacturers Suppliers Factory - Customized Radiant Tube - WELONG
Brand: Welong
SKU: 248985558

Description

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Specification

Material	HU, HT, HK, HP, HW, HH 24/24NbTiZr, 50Cr/50Ni (2.4813), 1.4865, 1.4849, 1.4848, 1.4410, 1.4059, 1.4841, 1.4845, 1.4852, 2.4879 or according to the customer's requirements.
Standard	ANSI, ASTM, ASME, DIN, GB,
*Dimension(LWH)*	According to Customer Drawings
Weight	50-3600kg
Tube Length	Up to 4500mm
Wall Thickness	≥6.5mm
Tube Configuration	W-Type, U-Type, I-Type, Customised Designs
Operating Temperature	Up to 1200°C (Depending on Alloy Grade)
Process	Centrifugal casting + assembly + welding + machining
Application	Heat Treatment Furnaces\Continuous Annealing Lines (CAL) \Continuous Galvanizing Lines (CGL) \Roller Hearth Furnaces \Sintering Furnaces\ Industrial Furnace Systems
Service Life	Quenching Furnace: ≥1 Year; Tempering Furnace: ≥3 Years; Gas-Fired Radiant Tube: ≥2 Years*

What are Radiant Tubes Used for?

Radiant tubes are widely used in high-temperature industrial furnaces where efficient heat transfer, oxidation resistance, and long-term reliability are critical.

Continuous Annealing Lines (CAL)

Continuous Galvanizing Lines (CGL)

Roller Hearth Furnaces

Heat Treatment Furnaces

Bright Annealing Furnaces

Sintering Furnaces

Controlled Atmosphere Furnaces

Batch and Bell Furnaces

Steel Strip Processing Lines

Non-Ferrous Metal Thermal Processing Lines

Request a Quote for Radiant Tube

To help us provide an accurate quotation, please share the following information: Drawing or sample photos, Roller diameter and length, Material requirement, Quantity.

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Why choose us

As a professional radiant tube manufacturer, Welong has over 30 years of experience in manufacturing centrifugally cast heat-resistant alloy components for industrial furnace systems. We have extensive expertise in producing furnace rolls, radiant tubes, sink rolls, stabilizer rolls, and other critical components. Designed for continuous operation under high temperatures and thermal cycling, our radiant tubes offer excellent heat transfer efficiency, superior resistance to oxidation and thermal fatigue, and extended service life, helping customers reduce maintenance downtime and improve furnace operating efficiency.

Advanced Centrifugal Casting Expertise

Advanced centrifugal casting technology delivers superior metallurgical structure, excellent oxidation resistance, and longer service life.

Complete In-House Production

From casting and machining to welding, assembly, testing, and final inspection, all key manufacturing processes are managed in-house to ensure consistent quality and reliable lead times.

Custom Manufacturing

Products can be manufactured according to customer drawings, samples, or reverse engineering requirements.

Engineering Support

Experienced engineers provide support for material selection, structural optimization, and performance improvement.

ISO 9001 Quality Assurance

A strict ISO 9001-certified quality management system ensures consistent product quality and reliability.

1-Year Product Warranty

All products are covered by a one-year warranty, excluding normal wearing parts.

Quality Control

As a professional radiant tube factory, Welong applies comprehensive quality control procedures to ensure consistent product quality and reliability. Inspection equipment includes Spectrometers, Metallographic Microscopes, Universal Testing Machines, Rockwell Hardness Testers, Roughness Testers, Hydrostatic Pressure Testing Equipment, and Digital Temperature Controllers.

Raw Material Verification

Chemical Composition Analysis

Dimensional Inspection

Dye Penetrant Testing (PT)

Hydrostatic Pressure Testing (Water Pressure Test)

Hardness Testing upon request

Metallographic Examination upon request

Mechanical Property Testing upon request

Our Cases

Secure packaging with iron stands, heavy-duty wooden crates, or customised solutions, reliable lead times, and successful project delivery worldwide.

industrial furnace radiant tubes manufacturer

long-life heating radiant tubes manufacturer

Our Factory

Certifications

ISO 9001:2015

ISO 9001:2015

Certificate name

FAQ

Q: Are radiant tube heaters efficient?

A: Radiant tube heaters offer an efficient way to heat spaces, both in terms of energy consumption and the effectiveness of the heat they produce. Their ability to provide direct, uniform heating with reduced energy use makes them a compelling choice for those looking to optimise their heating solutions.

Q: Is a radiant heater cheap to run?

A: Radiant heaters can be relatively cheap to run. Their efficiency and targeted heating capabilities make them a cost-effective option for many users, though the exact running costs will depend on individual circumstances and the specific type of radiant heater used.

Q: Do radiant heaters really work?

A: Radiant heaters are effective, particularly in providing direct, localised heat with minimal energy waste. Their functionality in both indoor and outdoor settings, along with the immediate warmth they provide, makes them a practical heating solution for various scenarios.

Q: What does a radiant tube heater do?

A: A radiant tube heater offers a highly efficient solution for warming large areas. Its capacity to conserve energy enhances its appeal, making it a favoured option in diverse settings, including commercial, industrial and outdoor environments.

Q: How do radiant tubes work?

A: When power is supplied to the heater, heat is generated because of the joule's heating. This heat is transferred from the electric heater to the radiant tube by radiation. And then on, from the radiant tube to the material being heated. The material gets heated up by irradiation from the radiant tube.

Q: What is the difference between convection and radiant tubes?

A: Radiant heat warms objects and surfaces without heating the air in between. Those objects warm up directly and radiate back. Convection warms the air, which is a triple inefficiency.

Q: What is meant by radiant tubes?

A: The performance of a heating system depends not only on the furnace burner, but also on the radiant tubes. The aim of the radiant tubes is to transfer heat to the load through irradiation. Heat exchange occurs when the combustion fumes are generated by the burner and then are conveyed through the tube.

Q: How long does radiant heat tubing last?

A: This plastic tubing can last between 30-50 years. However, since water must be heated and travel through the system, a boiler and a pump are also required. You can expect a boiler to last 15-20 years, but a pump may fail after ten years.

Q: How deep should radiant tubing be?

A: The highest output for the simulations I ran occurs when the tube is centered about 3/4-inch below to slab surface (about 25.1 Btu/h/ft2 at 100º water temperature). Lowering the tube so that its center is 2 inches below the slab surface (e.g., tubing centered on 4-inch slab thickness) reduces output to 23.8 Btu/h/ft2.

Q: What is the function of the radiant tube?

A: A ceramic or metal tube which separates the gas burner (or electric element) from the furnace atmosphere. A method of heating a furnace without contaminating the gas atmosphere with the products of combustion from the heating gas.

Q: What is the composition of radiant tube?

A: The tubes are typically constructed from materials such as stainless steel or ceramic, ensuring resistance to corrosion as well as high-temperature environments.

Q: How thick is radiant tubing?

A: The most common sizes are 3/8", 1/2", 5/8" and 3/4". Generally, for a residential Infloor Heating System® we recommend 3/8" and 1/2" tubing. The tube size dictates the flow rate that can be achieved and also indicates the maximum loop length based on the head pressure.

Q: How deep should radiant tubing be in concrete?

A: I've read that radiant tubing should be placed nearer to the surface and 1″ to 2″ is recommended.

Q: Should radiant tubing go above or below rebar?

A: Unless special design considerations require otherwise, the tubing should always be positioned on top of the reinforcement, in order to stay closer to the surface of the slab. If using welded wire mesh, you may want opt for sheets rather than rolls whenever possible.

Q: How do radiant tubes work?

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