Project Overview

Zhejiang Jiuli Special Materials Co., Ltd. (Jiuli Special Materials) is a leading Chinese manufacturer of high-end industrial pipes, with products widely used in petroleum, chemical, nuclear power, and offshore engineering applications. In response to the increasing demand for corrosion- and pressure-resistant pipes for deep-sea oil and gas operations, Jiuli Special Materials sought to upgrade its interior cladding process for 6-meter seamless pipes, aiming to enhance service life under extreme conditions. Canroon provided a dedicated internal cladding solution centered on the CR2100-020E-14TW induction heating system, successfully overcoming multiple technical challenges associated with long-pipe interior welding.

Customer Challenges

• Cladding inside ultra-long pipes: Welding the interior of 6-meter pipes requires the torch to maintain a stable trajectory along the entire length, with uniform cladding thickness and strong metallurgical bonding to the base material. This places high demands on travel control and process stability.

• Strict preheating requirements: Continuous preheating above 100°C is essential during cladding to prevent cold cracking and ensure the metallurgical quality of the deposited layer.

• Precise synchronized movement and angle correction: Both the torch and the equipment must move in absolute synchrony along the rail, with real-time angle correction to eliminate deviations and ensure accurate cladding over the full pipe length.

  
  

Canroon Solution

To meet Jiuli Special Materials’ requirements, Canroon delivered an integrated cladding system featuring the CR2100-020E-14TW induction heating unit and customized flat-type coils to match the pipe structure and heating demands.

• Integrated preheating and cladding: The CR2100-020E-14TW unit incorporates high-precision induction heating, providing synchronous preheating during cladding. Real-time temperature monitoring maintains preheat above 100°C, preventing cold cracking and enhancing the deposited layer’s bonding strength.

• High-precision synchronized movement: The equipment is mounted on rails, mechanically and electrically linked to the torch assembly. A precision servo system maintains a stable travel speed of 1.2 cm/min, ensuring consistent 6-meter cladding trajectories with uniform layer thickness and smooth surface quality.

• Real-time angle correction: A dedicated angle correction device continuously monitors the torch posture and automatically compensates for any deviations, overcoming deflection or installation errors in long-pipe welding and ensuring the torch remains perpendicular to the pipe wall.

Customer Benefits

• Enhanced process capability: The Canroon system helped Jiuli Special Materials overcome bottlenecks in long-pipe interior cladding, enabling production of high-performance composite pipes capable of withstanding harsh deep-sea conditions.

• Improved quality assurance: Precise synchronized control and real-time temperature monitoring significantly increased the cladding layer’s density and bonding strength, extending pipe service life under extreme conditions.

• Optimized efficiency: Automated integration reduced manual intervention, enabling continuous preheating and cladding operations and supporting scalable, standardized production.

Canroon continues to provide customized induction heating and automation solutions for high-end pipe manufacturing, helping clients enhance competitiveness and meet the most demanding industrial challenges.