Large Diameter Tunnel Oven

Juming Steel's Large Diameter Tunnel Oven is meticulously designed for continuous curing of 3PE and FBE coatings on steel pipes with diameters ranging from Φ219mm to Φ3000mm. This equipment utilizes a CFD-optimized hot air circulation system, Siemens PLC intelligent temperature control technology, and a modular energy-saving design, effectively solving the common problem of uneven heating during the curing process of large-diameter pipes. This tunnel oven is widely used in oil and gas pipelines, water supply projects, and marine engineering, and has been certified to relevant standards such as ISO 21809, DIN 30670, and CSA Z245.20.

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Product Description

As a leading anti-corrosion steel pipe equipment supplier in China, Tianjin Juming Steel Pipe Co., Ltd. has developed a new generation of Large Diameter Tunnel Oven specifically designed for continuous curing of 3PE and FBE coatings on large-diameter steel pipes. Unlike traditional batch-type box furnaces, our tunnel oven supports continuous pipe-in operation, significantly improving production efficiency for oil & gas, water transmission, and marine engineering projects.

Through CFD-optimized airflow duct design combined with infrared auxiliary heating technology, we have successfully solved the common industry problems of "uneven heating" and "high energy consumption" for pipes with diameters exceeding 1000mm. Our equipment has been successfully operating in multiple large-scale pipeline projects across the Middle East and South America.

Technical Specifications

Parameter	Specification (JUMING-TUNNEL-2000 Series)
Applicable Pipe OD	Φ219 mm - Φ3048 mm
Heating Zone Length	12m / 18m / 24m
Max Operating Temperature	260°C
Temperature Uniformity	≤ ±7°C
Conveying Speed	0.5 - 3.0 m/min
Heating Source Options	Natural Gas Direct-Fired / Electric Radiant Tube / Thermal Oil
Insulation Thickness	200mm Aluminum Silicate Fiber
Control System	Siemens PLC + HMI, remote monitoring & data logging
Energy Efficiency	Optional waste heat recovery system, save 15%-20% energy

Why Choose Juming's Large Diameter Tunnel Oven?

Superior Hot Air Circulation

Multi-angle side air supply with top return design eliminates "cold zones", ensuring synchronized temperature rise on large-diameter pipe surfaces, especially for thick-walled and extra-long pipes.

AI Smart Temperature Control

IoT-based PLC system with preset curing curves for different pipe diameters/wall thicknesses. Automatic temperature data recording for each pipe, exportable for traceability audit requirements.

Energy Saving & Eco-Friendly

High-efficiency insulation reduces heat loss; optional exhaust gas purification device (RTO) meets欧美 environmental standards. Reduces energy consumption by 15%-20% compared to traditional furnaces.

Modular Design & Fast Delivery

Factory pre-assembled modules, only bolt connection and electrical wiring required on-site, significantly shortening installation time. One-stop service from design to overseas installation guidance.

International Standard Compliance

Curing results meet CSA Z245.20, DIN 30670, ISO 21809-1 standards. Complete SAT test reports and temperature uniformity reports provided with each delivery.

Global After-Sales Service

24/7 online technical support + overseas engineer on-site commissioning. Core spare parts available from Shanghai/Tianjin warehouse.

Successful Project Cases

Middle East Oil Pipeline Project

Requirement: Φ1420mm x 18m steel pipe, 3PE anti-corrosion coating, target capacity 5km/day.

Solution: Provided 24m heating zone + 12m insulation zone natural gas tunnel oven with intelligent zone temperature control.

Result: Furnace temperature uniformity measured at ±5°C, finished product peel strength improved by 12% compared to client's old line, energy consumption reduced by 18%.

South America Water Transmission Project

Requirement: Single-layer FBE fusion bonded epoxy coating, requiring fast curing with zero bubbles on surface.

Solution: Electric heating tunnel oven + infrared preheating section.

Result: Achieved complete gelation of coating at 2.5m/min line speed, third-party inspection confirmed zero pinholes.

Product Video

Frequently Asked Questions

Is your Large Diameter Tunnel Oven suitable for both FBE and 3PE coatings?

Yes. Our equipment temperature range can be precisely controlled from ambient to 260°C. FBE typically cures around 230°C, while 3PE requires around 220°C. The system comes with preset "FBE Mode" and "3PE Mode" for one-click process parameter switching.

Is installation complicated for extra-large diameter pipes?

Not at all. We use sectional modular shipping. Side walls, roof, and heating units are all pre-assembled at the factory. Only bolt connection and electrical wiring are required on-site. We provide detailed installation drawings and on-site supervision services.

Can you retrofit my existing oven line?

Absolutely. We can provide thermal imaging inspection services to analyze heat loss points and airflow duct defects in your existing oven, then add insulation thickness or modify hot air circulation systems accordingly. ROI period is typically within 1.5 years.

What is the delivery time and warranty policy?

Standard equipment delivery time is 60-75 days after down payment. We provide 12 months whole machine warranty, with 18 months extended warranty for key electrical components (PLC, VFD), and lifetime technical support.

Our Trusted Partners

Need a Customized Large Diameter Tunnel Oven Solution?

Please provide your pipe diameter, wall thickness, coating type (FBE/3PE), and target capacity. Our engineers will provide technical proposal and quotation within 24 hours.

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Contact Info

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Address

Pangzhuangzi Village, Daqiuzhuang Town, Jinghai District, Tianjin, China
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Tel

+86-18649193844
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E-mail

18649193844@163.com

Send your inquiry to Juming Steel Pipe. We are a China Supplier providing advanced, quality customized steel products with professional & rapid response.