Introduction and Features of Qingdao Hongchenghong Professional Internal Sandblasting & Rust Removal Equipment

Introduction and Features of Qingdao Hongchenghong Professional Internal Sandblasting & Rust Removal Equipment

In the field of metal anti-corrosion pretreatment, sandblasting rust removal equipment is the core technology for enhancing coating adhesion. Qingdao Hongchenghong Anti-Corrosion and Thermal Insulation Co., Ltd., as a leading enterprise in China's anti-corrosion and thermal insulation equipment industry, has leveraged its independently developed internal sandblasting rust removal system to demonstrate significant advantages in applications such as pipeline corrosion protection and steel structure treatment. This article will systematically analyze the innovative value of Qingdao Hongchenghong's internal sandblasting rust removal equipment from three perspectives: equipment technology principles, key features, and industry applications.

1. Technical Principle: Fusion of Multimodal Jetting and Intelligent Control

Qingdao Hongcheng Hongnei blast and derusting equipment features a "dry-wet dual-mode" design, allowing flexible switching between operation modes based on the material of the workpiece and specific surface treatment requirements. In dry blasting mode, the equipment uses a pressurized compressed air system to propel abrasives—such as copper ore sand or garnet—at speeds ranging from 80 to 120 m/s onto the workpiece surface. This high-velocity impact effectively removes oxide layers, achieving a Sa2.5 cleanliness rating (per international standards), with surface roughness reaching Ra40–80 μm. This makes it ideal for heavy-duty anti-corrosion applications in industries like shipbuilding and bridge construction.

The wet blasting mode achieves "zero dust" operation through a water-abrasive mixture. Equipped with Germany's TORBO fifth-generation wet blasting technology, the system precisely controls the ratio of abrasive material to water at 1:3. Combined with a vacuum recovery system, this approach reduces dust emissions by up to 95% while also cutting abrasive consumption by 60%. This mode is particularly well-suited for industries such as food processing equipment and precision instruments—areas where environmental cleanliness requirements are especially stringent.

The equipment's core control system features a dual-redundant design incorporating PLC and a touch screen, enabling real-time adjustment of parameters such as pressure, flow rate, and jet angle. For instance, when treating the inner walls of pipelines, the rotating spray gun can achieve 360° coverage with no blind spots, ensuring that the unevenness in wall roughness remains within an error margin of ≤5%. This significantly enhances the durability of subsequent anti-corrosion coatings.

II. Core Features: A Triad of Efficiency, Environmental Friendliness, and Intelligent Automation

1. Modular design adapts to diverse scenarios

Qingdao Hongchenghong Equipment utilizes standardized modular components, allowing customized conveyor systems tailored to workpiece dimensions. For instance, its pass-through channel steel equipment features wear-resistant sleeve-equipped conveyor roller tracks, offering a service life of up to 6,000 hours and capable of continuously handling steel structural components up to 12 meters in length. Meanwhile, the company has developed a telescopic rotating arm specifically designed for internal pipe wall treatment, with a maximum extension of 8 meters. Paired with detachable nozzles, this innovative solution can accommodate pipelines ranging from DN150 to DN1200 in diameter.

2. Eco-friendly Performance Breaks Through Industry Bottlenecks

The equipment integrates a three-stage dust removal system: The first-stage cyclone separator recovers 90% of the usable abrasive material; the second-stage cartridge filter achieves a filtration accuracy as fine as 0.5 μm, ensuring that emission concentrations remain below 10 mg/m³; and the third-stage activated carbon adsorption unit further purifies the exhaust gases, meeting the comprehensive emission standards for air pollutants outlined in GB16297-1996. Measured data show that after 8 hours of continuous operation, the dust concentration within a 5-meter radius around the equipment is only 0.3 mg/m³—well below the national regulatory limit.

3. Intelligent control enhances operational precision

The device is equipped with an AI-powered visual recognition system that automatically scans workpiece surfaces for defects and uses algorithms to generate the optimal abrasive blasting path. For instance, when processing steel structures with welds, the system intelligently adjusts the jetting pressure—increasing it by 15% in the weld area—and boosts the overlap rate from 50% to 70%, ensuring consistent surface roughness between the weld and the base material. Additionally, the equipment features a remote monitoring module, allowing users to check the device’s operational status, abrasive supply levels, and maintenance schedules in real time via a mobile app.

III. Industry Applications: Comprehensive Coverage from Pipeline Anti-Corrosion to Marine Engineering

Qingdao Hongchenghong Equipment has been successfully applied to several nationally significant key projects. In the construction of a cross-sea bridge, its through-type sandblasting equipment achieved a daily processing capacity of 300 tons of steel structures, representing a 40% efficiency improvement over traditional equipment—and the coating adhesion test results even reached 8.5 MPa (the national standard requires ≥5 MPa). Meanwhile, in the China-Russia East Line natural gas pipeline project, the company’s newly developed pipeline inner-wall sandblasting robot managed to process 200 meters of DN1420 pipelines in a single day, with surface roughness uniformity exceeding that of manual operations by more than 30%.

Designed for the unique environmental conditions of marine engineering, the equipment features a sandblasting chamber made from 316L stainless steel and is equipped with a salt-spray-resistant coating, enabling continuous operation for up to 5,000 hours without corrosion even in CL-9-level salt-spray environments. In a recent offshore drilling platform renovation project, the company’s wet-type sandblasting system successfully removed marine biofouling layers as thick as 3mm from the platform’s structural columns—while precisely preventing over-erosion of the underlying material, ultimately helping the client save more than 2 million yuan in rework costs. In conclusion: Technological innovation drives industry advancement.

Qingdao Hongcheng Hong's internal wet and dry blasting equipment redefines the standards for metal surface treatment through a technological framework featuring "dual-mode operation—dry and wet—combined with intelligent control and eco-friendly integration." Not only does its equipment meet international standards such as the EU CE certification and Russia's GOST certification, but it also upholds a steadfast commitment to delivering "top-quality equipment at competitive prices, backed by exceptional service"—providing tailored solutions to customers in more than 30 countries worldwide. Amidst the global push toward "Dual Carbon" goals, Qingdao Hongcheng Hong is driving innovation to lead the blasting industry toward greener, smarter transformations, offering a pioneering Chinese solution for corrosion protection projects around the globe.