Qingdao Hongcheng Hong Inner Wall Shot Blasting and Rust Removal Equipment

Qingdao Hongcheng Hong Inner Wall Shot Blasting & Rust Removal Equipment: Deep Integration of Technological Innovation and Industrial Applications

As a leading enterprise in China's pipeline anti-corrosion and thermal insulation equipment sector, Qingdao Hongchenghong Anti-Corrosion & Thermal Insulation Co., Ltd. has pioneered technological advancements in its internal wall shot blasting and derusting equipment, providing highly efficient solutions for pipeline treatment in industries such as oil, natural gas, and chemical engineering. By combining physical impact with automated control, this equipment precisely removes oxide layers, rust, and contaminants from the inner surfaces of steel pipes, making it a critical tool for ensuring the long-term safe operation of pipelines.

Technical Principle: The Precise Coordination of Physical Impact and the Circulatory System

The core principle of Qingdao Hongcheng Hong's internal wall shot blasting and rust removal equipment is based on the physical impact of high-speed projectiles. Once the equipment is activated, the shot blaster uses a hydraulic motor to drive the impeller at high speed, propelling steel or aluminum shots—carefully directed through a nozzle—onto the inner surface of the steel pipe. These projectiles strike the surface at speeds of tens of meters per second, instantly removing oxide scale, rust layers, and oil contaminants while simultaneously creating a uniform roughness. This roughened surface provides an ideal substrate for subsequent anti-corrosion coatings, ensuring superior adhesion.

The equipment features a fully enclosed circulation system, ensuring the efficient separation and recovery of shot media from impurities. Scattered shot media, rust flakes, and dust are collected by a screw conveyor and then fed into an elevator. After being screened by a separator, the purified shot media is returned to the storage hopper for reuse in the cycle, while the dust is thoroughly cleaned by a baghouse dust collector, meeting stringent environmental emission standards. This design not only minimizes material consumption but also prevents secondary pollution, aligning perfectly with the growing trend toward green manufacturing.

Equipment Structure: Modular Design and Adaptive Optimization

Qingdao Hongcheng Hong's internal wall shot blasting and derusting equipment consists of three major modules:

1. Host System: Includes the shot blasting chamber, shot circulation system, and blast nozzle. The shot blasting chamber is constructed by welding wear-resistant steel plates and lined with protective panels to extend its service life. The shot circulation system utilizes a screw conveyor, elevator, and separator to automatically recover and purify the shots. The blast nozzle is equipped with a German hydraulic motor, allowing adjustable shooting angle and speed based on tube diameter, ensuring complete coverage of all inner wall surfaces without any dead zones.

2. Transmission System: The system employs a V-shaped roller transmission mechanism, where the steel pipes rotate and advance simultaneously on rollers tilted at an angle of 30° to 45°. As they move through the rust-removal zone between two wire wheels, dynamic cleaning is achieved. This design enables a rust-removal rate of over 10 meters per minute for individual 6-meter-long steel pipes, delivering an efficiency equivalent to that of 15 workers performing manual operations.

3. Control System: Equipped with an integrated PLC automation module that enables real-time monitoring of motor load, shot flow rate, and dust removal efficiency, while allowing parameter adjustments via a touch screen. The equipment also features a safety interlock system that automatically shuts down the machine if the chamber door is opened or if the shot supply falls below a critical level, ensuring operational safety.

Performance Advantages: Efficiency, Energy Savings, and Customized Services

1. High Efficiency: The equipment can process 200 standard steel pipes per day, achieving a rust removal grade of Sa2.5 (international standard), with surface roughness consistently maintained between 40 and 80 μm—meeting the stringent requirements of processes such as epoxy powder coating and 3PE anti-corrosion applications.

2. Low Energy Consumption: The main motor boasts a power rating of only 8 kW (with a dual-motor configuration), and when paired with the shot media circulation system, the overall energy consumption is reduced by 60% compared to conventional acid pickling processes, while the cost per ton of treatment is lowered by 45%.

3. Customization: Qingdao Hongchenghong offers tailored solutions for pipe diameters ranging from 2 3/8″ to 3 1/2″, and can integrate functional modules such as inner-wall spraying and beveling processes according to user requirements, enabling seamless “rust removal and anti-corrosion” operations.

Application Scenario: Practical Validation of Cross-Industry Solutions

In the Russian Siberian natural gas pipeline project, Qingdao Hongchenghong Equipment successfully processed X65-grade pipelines under -40°C ambient conditions. After derusting, the coating adhesion improved by 30%, and the project timeline was shortened by 25%. Meanwhile, in Egypt’s Suez Canal Economic Zone, the equipment provided 24-hour continuous operation for an oil refining and petrochemical project, achieving dust emission concentrations below 8 mg/m³—and has been certified by the EU CE standard.

In the domestic market, this equipment has already been deployed in long-distance pipeline projects for companies such as CNPC and Sinopec, and it is being used to replace traditional sandblasting methods during urban gas pipeline renovations, thereby eliminating the impact of sand and dust on residential areas. For instance, after adopting this equipment in the Qingdao Jiaozhou Bay Subsea Tunnel repair project, the single-operation time was reduced from 72 hours to just 18 hours, resulting in a decrease of 8 million yuan in operational downtime losses.

Technological Innovation: Continuous Breakthroughs through Industry-Academia-Research Collaboration

Qingdao Hongcheng Hong has established a joint laboratory with Qingdao University of Science and Technology and the China Petroleum Pipeline Engineering Research Center, applying CAD simulation technology to optimize projectile trajectories, thereby reducing equipment energy consumption by another 12%. The intelligent projectile compensation system launched in 2024 uses sensors to dynamically adjust the ejection volume in real time, keeping material waste below 3%.

Currently, the company holds 16 national patents, among which the "Hydraulic Synchronous Shot Blasting Technology" has earned the Shandong Province Science and Technology Progress Award. Its products have also achieved ISO 9001 quality management system certification and are exported to 32 countries, establishing the company as a benchmark for "Made in China" in the field of anti-corrosion equipment.

Future Outlook: Dual Drivers of Intelligence and Sustainability

As Industry 4.0 advances, Qingdao Hongcheng Hongzheng is developing an inner-wall shot blasting and rust-removal robot equipped with AI-powered visual inspection. This robot uses image recognition technology to automatically identify the degree of rust and adjust process parameters accordingly. Meanwhile, the company plans to launch biodegradable shot media by 2026, further reducing its environmental impact.

From a startup in the Beiguan Industrial Park to one of the global top 10 providers of anti-corrosion equipment, Qingdao Hongcheng Hong has spent seven years embodying the essence of "technology-driven enterprise." Its internal wall shot blasting and derusting equipment not only cleans metal surfaces but also serves as a guardian of pipeline safety and industrial efficiency, continuously propelling China's equipment manufacturing industry toward greater sophistication and intelligence.