Qingdao Hongcheng Hong Internal Wall Sandblasting Rust Removal Equipment

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

As a key industrial equipment manufacturing base in Northern China, Qingdao has consistently remained at the forefront of technology in the fields of pipeline anti-corrosion and surface treatment. Qingdao Hongchenghong Anti-Corrosion & Thermal Insulation Co., Ltd., with its independently developed internal wall sandblasting rust removal equipment, has become a trusted partner for customers in industries such as oil, chemical engineering, and municipal projects. The company’s equipment boasts high efficiency, environmental friendliness, and intelligent features, effectively addressing the longstanding challenges of low efficiency, heavy pollution, and poor adaptability inherent in traditional rust removal processes. This innovative solution provides critical technical support for comprehensive pipeline lifecycle management.

I. Technological Breakthrough: From Physical Impact to Precision Control

The core advantage of Qingdao Hongcheng Hong's internal wall sandblasting and derusting equipment lies in its "three-in-one" technology system:

1. Precise Control Technology for Bullet Beam Streams

The equipment features a shot blaster driven by a German hydraulic motor, with a stepless speed adjustment system enabled by a variable-frequency drive to precisely control the abrasive projection velocity. For small-diameter pipelines with diameters below DN600mm, the equipment is equipped with a dual-gun联动 (linked) sandblasting system, where the angle of the abrasive jet can automatically adapt to the curvature of the pipe, ensuring uniform rust removal on the inner wall—achieving a SA2.5-grade surface cleanliness standard. Measured results show that when treating φ500mm × 8mm steel pipes, the single-pass rust removal rate can reach up to 98%, while the surface roughness remains consistently within the Ra6.3–12.5μm range, fully meeting the pre-treatment requirements for 3PE anti-corrosion coatings.

2. Closed-loop System Design

The equipment integrates a sealed sandblasting chamber with a three-stage dust removal system, utilizing negative-pressure suction technology to keep dust concentrations below 8 mg/m³—far lower than the national emission standards. The recovery system employs a cyclone separator, achieving a 95% separation rate between abrasive media and oxide scale, while the steel shot recycling rate exceeds 80%, significantly reducing material costs. As an example, in a φ800 mm oil pipeline project undertaken by a petrochemical company, the adoption of this equipment reduced the cost of rust removal per kilometer from the traditional process’s 1,200 yuan to 780 yuan, while also shortening the construction timeline by 40%.

3. Intelligent Operation Platform

The equipment is equipped with a PLC control system and an HMI human-machine interaction interface, allowing users to pre-set 20 sets of process parameters. This enables fully automated, unmanned operation throughout the entire process—covering automatic material loading, sandblasting, dust removal, and unloading. Additionally, the built-in fault diagnosis system continuously monitors 12 critical indicators, such as hydraulic pressure and abrasive flow rate. If it detects abrasive blockage or seal failure, the system triggers an immediate shutdown protection within 0.3 seconds, preventing any potential damage to the equipment.

II. Scenario Adaptation: In-depth Customization of Multi-Industry Solutions

Qingdao Hongchenghong has developed three major series of internal wall sandblasting equipment tailored to the needs of various industries:

1. Specialized Series for Oil and Natural Gas

To address internal corrosion protection for long-distance pipelines, the equipment is equipped with a mobile trolley system capable of handling continuous pipeline sections up to 18 meters in length. In a gas field project located in western China, the equipment successfully completed rust removal on the inner walls of φ1016mm × 15.9mm X70-grade steel pipelines using an adaptive clamping mechanism. After treatment, the pipeline’s inner wall cleanliness reached ISO 8501-1 Sa3 grade, providing an ideal substrate for epoxy powder coating.

2. Municipal Water Supply Project Series

For the internal treatment of ductile iron pipes, the equipment utilizes a flexible abrasive blasting nozzle, and air pressure is adjusted to prevent excessive impact on the pipe walls. During a water supply pipeline renovation project in Qingdao, when treating a φ1200mm ductile iron pipe, the equipment reduced the thickness of the internal oxide scale from 2.3mm to below 0.1mm—while ensuring that the original strength of the pipe wall remained intact, with a loss rate of less than 3%.

3. Specialized Series for Chemical Storage Tanks

For the treatment of vertical storage tank inner walls, the equipment integrates a lifting platform with a 360° rotating sandblasting nozzle, enabling full-coverage treatment of tank interiors up to 25 meters in height. In a storage tank maintenance project at a certain chemical park, the equipment utilized a segmented sandblasting process, reducing the rust removal cycle for a single 2,000 m³ tank from 15 days to just 5 days—while ensuring that the post-treatment surface roughness remained consistent within an error margin of less than ±1.5 μm.

3. Market Validation: Quality Endorsed by Over 500 Projects Worldwide

Qingdao Hongchenghong Equipment has been exported to 12 countries including Russia, Egypt, and India, with a total of over 500 projects served. In a certain oilfield project in Kazakhstan, the equipment operated continuously for 720 hours without any failures under extremely low temperatures of -30°C, earning the owner's "Best Equipment Supplier" award. Meanwhile, in Hanoi's water supply project in Vietnam, the equipment received certification from Vietnam's Ministry of Construction, becoming the country's first demonstration model for municipal pipeline inner-wall treatment standards.

In the domestic market, the company has established long-term partnerships with industry giants such as CNPC, Sinopec, and China Water Resources Group. Its equipment has demonstrated outstanding performance in key national projects, including the China-Russia East-Route Natural Gas Pipeline and the Central Line of the South-to-North Water Diversion Project. According to a 2024 customer satisfaction survey, the equipment failure rate remained below 0.8%, while the average response time for after-sales service was just 2.3 hours—both figures placing the company among the industry leaders.

IV. Future Outlook: The Integration of Green Manufacturing and Digital Twins