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30+ Years of Experience
We Provide Product Customization Services

JNFLEX specializes in manufacturing metal bellows, heat protection tubes, and various types of corrugated pipes. With our core team boasting nearly 20 years of expertise in design and production, we are proud to offer industry-leading craftsmanship, advanced design capabilities, and testing equipment. We ensure high-quality, customized solutions tailored to meet your specific needs.

APPLICATIONS

Automotive

Construction

New energy

Railway and mobility

Automotive Industry

JNFLEX flexible tubes and metal corrugated pipes are widely used to protect various automotive components, offering comprehensive protection for A/C lines, plastic pipes, hoses, engine wiring harnesses, and other critical parts that require reflective thermal insulation.

Construction Industry

JNFLEX Pre-stressed Corrugated pipe is embedded in steel bar in the bridge steel banding process, the purpose is to reserve space for wear steel strand when pouring concrete, so as to facilitate the later steel strand and tension, due to corrugated pipe with corrugation, and better concrete combination, a very good combination between steel strand, cement paste, beam plate after the condensation of steel strand tension grouting, so as to ensure uniform distribution of tensile stress and stress loss.

Energy storage Industry

The application of JNFLEX corrugated tubes in the automotive energy storage industry is primarily demonstrated through the use of energy storage bellows, which can store and release energy. These flexible corrugated tubes and metal bellows are designed to withstand high-temperature environments and offer excellent corrosion resistance, effectively absorbing vibration and thermal expansion stress. They are widely used in exhaust systems, fuel oil systems, sensor protection, and wire harness protection, among other applications.

Rail transit industry

JNFLEX has extensive experience in the design, development, and production for the rail transit industry. We primarily supply silencer ducts, window ducts, ventilation connection hoses, and various accessories for rail applications. Our commitment is to deliver professional solutions tailored to the specific needs of the rail industry.

Hot Products

Automotive pipeline protection

Aluminum foil tubeHeat Shrink Tubing

Flat-clad aluminum foil tubeFlat sheath

Automotive pipeline connection

Stainless steel bellowsNylon tube

Power steering silencer hose Exhaust pipes

ABOUT JNFLEX

JNFLEX (CHANGZHOU) CO., LTD (the former is Changzhou Jiangnan Prestressed Corrugated Pipe Factory) established in 1995 and located in Changzhou, Jiangsu province, is a high-tech enterprise dedicated to providing customers with flexible connection and protection products and solutions. We specialize in the design, development, production, and technical service of various corrugated duct, flexible ducts and tubes, stainless bellows, and kinds of plastic corrugated hoses.

1995

Founded

30+

Experience

30000

Factory area

1000+

Partners

HONORARY
QUALIFICATIONS

The JNFLEX Business System incorporates a Quality Management system compliant to IATF 16949 and ISO 9001 certifications. We understand that our high standards of quality translate into passenger safety and customer solutions. Therefore, we plan to never falter in our commitment to retaining and improving our superior level of quality each and every day.

Quality Assurance

JNFLEX (CHANGZHOU) CO., LTD is partnering with the Science and Technology Bureau of Changzhou's Wujin District to set up an Engineering Technology Research Center, focusing on the R&D and innovation of corrugated pipe technology. Our team brings together industry experts dedicated to providing high-performance, versatile corrugated pipe products that meet the complex needs of various fields. With advanced R&D equipment and extensive technical expertise, we continuously overcome technical barriers and drive progress in the corrugated pipe industry.

our culture

Mission

To become the most valuable enterprise in flexible connection and protection solutions.

Vision

Continuously creating value for customers, employees, corporate stakeholders and the country

Values

Customer First
Continuous improvement
Dedication

Team work
Integrity
Innovation

long-term collaborations with
Fortune 500 companies
both domestically and internationally

Automotive
Industry

TI Automotive

Pre-stressed
Construction
Concrete

Shagang Group
CHINA RAILWAY GROUP

Energy Storage
Industry

Rail Transit
Industry

CRRC
New United Group
SIEMENS

News and Events

Merry Christmas

江南波纹管祝您圣诞快乐! Merry Christmas

JNFLEX to Showcase Innovative Thermal Protection Solutions at Automechanika Shanghai 2025

JNFLEX is proud to announce its participation inAutomechanika Shanghai 2025, Asia’s leading trade fair for the automotive aftermarket and OEM industry. The event will take place from November26–29, 2025, at the National Exhibition and Convention Center (NECC) in Shanghai.You are warmly

JNFLEX - EQUIP AUTO Paris 2025 YOU'RE INVITED!

YOU'RE INVITED!Meet JNFLEX atEQUIP AUTO PARIS 2025Booth No.: 1H 1R157October 14–18, 2025Paris Expo Porte de Versailles, FranceWe’re excited to showcase our latest innovations in automotive flexible hose & tubing solutions — engineered for performance, durability, and customiza

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