Qingdao Hongchenghong Internal and External Rust Removal Equipment

Qingdao Hongchenghong Internal and External Rust-Removal Equipment: Technological Innovation Sets a New Industry Benchmark

In the field of pipeline corrosion protection and thermal insulation, the quality of derusting equipment directly determines the service life and anti-corrosion performance of pipelines. As a leading domestic manufacturer and R&D pioneer in corrosion‑protection and insulation equipment, Qingdao Hongchenghong Corrosion Protection and Insulation Co., Ltd. has set a benchmark for technological advancement in the industry through its innovative technologies for internal and external derusting equipment and its global footprint. Its products not only serve more than 30 provinces and municipalities across China but are also exported to over ten countries, including Russia, Egypt, and India, earning the company the reputation of a “Chinese calling card” on the international stage.

Technological Foundation: From Equipment R&D to Process Innovations

Qingdao Hongchenghong’s comprehensive internal and external rust‑removal equipment lineup includes core products such as steel pipe external‑wall shot‑blasting rust‑removal machines, integrated internal‑wall spray‑and‑blast rust‑removal units, and automatic sandblasting machines, delivering a complete solution that spans surface cleaning to anti‑corrosion treatment. Taking the steel pipe external‑wall shot‑blasting rust‑removal machine as an example, this equipment is equipped with a high‑efficiency, high‑power shot blaster that uses a high‑velocity stream of abrasive media to impact the pipe’s surface, thoroughly removing scale, weld spatter, and rust layers. This process achieves a surface roughness of Ra 6.3–12.5 μm, significantly enhancing paint film adhesion. Technical specifications indicate a rust‑removal rate of ≥10,000 mm/min; a single unit delivers productivity equivalent to 15 skilled workers. With a longitudinal travel range of 13,500 mm and a lateral travel range of 10,000 mm, the machine can handle pipes longer than 6 meters, meeting the demands of large‑scale pipeline projects.

The internal wall rust‑removal technology likewise exemplifies innovation. The company has developed an integrated spray‑and‑rust‑removal machine for steel pipe interiors, which uses an electric pushrod to raise and lower the spray nozzle and a high‑pressure pump to deliver the rust‑removal agent, achieving both uniform internal spraying and mechanical scrubbing. The equipment features built-in liquid‑level sensors and an electromagnetic‑valve control system that continuously monitor the remaining rust‑removal agent and automatically discharge sludge, thereby preventing environmental contamination. For thin‑walled tubing, the device employs an L‑shaped clamping mechanism with position‑limiting bars to prevent deformation during processing, ensuring rust‑removal accuracy within ±0.1 mm.

Process Innovation: The Integration of Kinetic Energy Recycling and Intelligent Control

Qingdao Hongchenghong’s rust‑removal equipment breaks with conventional design paradigms, achieving an integrated synergy between kinetic‑energy conversion and intelligent control. Take the external‑wall shot‑blasting machine as an example: its core blast wheel converts electrical energy into the kinetic energy of abrasive media, which, upon impact with the surface, is recirculated via a mechanical recovery system to regain kinetic energy, thus forming a closed-loop cycle. This innovative design not only boosts cleaning efficiency but also reduces energy consumption by more than 30%. The equipment is equipped with nine gear reducers and two main motors that work in concert, employing a 1:19 speed ratio to ensure a uniform distribution of abrasive media—achieving 98% consistency—and thereby preventing localized over‑cleaning that could damage the pipe material.

The internal-wall derusting equipment incorporates intelligent sensing technology. The nozzle‑lifting system is precisely controlled by controller 4, and, in conjunction with real-time feedback from liquid‑level sensor 9, it dynamically matches the amount of derusting agent used with the spray‑time duration. Within the clamping mechanism, electric actuator 23 drives the L‑shaped locking rod 21 to slide, which in turn causes the sliding block 10 to move the clamping plate 12 in synchrony, ensuring that the centering error of the pipe remains below 0.5 mm. This integrated “mechanical–electronic–hydraulic” control scheme enables the equipment to accommodate a wider pipe‑diameter range, from 2 3/8″ to 3 1/2″, covering more than 90% of the pipe specifications used in the petroleum, chemical, and natural gas industries.

Market Applications: From Domestic Projects to International Undertakings

Qingdao Hongchenghong’s rust‑removal equipment has been widely deployed in major domestic and international projects. In China, its systems have been used in national strategic initiatives such as the Third Line of the West–East Gas Pipeline and the China–Russia East Route Natural Gas Pipeline, with cumulative treatment of over 5 million meters of pipeline. Taking the China–Russia East Route project as an example, its external‑wall shot‑blasting machines maintain stable operation even in subzero temperatures as low as –30°C, achieving a 100% pass rate for surface roughness compliance after derusting, thereby providing an excellent substrate for 3PE coating application. On the global market, the equipment has been exported to projects including Kazakhstan’s Kashagan Oilfield and India’s East–West Gas Transmission Project. Its salt‑spray resistance and corrosion‑proof performance have been certified by SGS, ensuring suitability for extreme environments such as deserts and marine settings.

The company’s technical team also offers customized solutions tailored to diverse customer needs. For example, the “through‑type sandblaster” developed for Egypt’s Suez Canal expansion project integrates both shot blasting and sandblasting functions, with a single unit capable of processing up to 200 tons per day—representing a 40% efficiency improvement over conventional equipment. In Vietnam’s Hai Phong LNG terminal project, the internal‑wall rust‑removal equipment features an explosion‑proof design that meets offshore platform safety standards, earning high praise from the client for its “reliable technology and prompt service.”

Future Outlook: Green Manufacturing and Intelligent Upgrading

In response to the “dual carbon” goals and the Industry 4.0 trend, Qingdao Hongchenghong is accelerating its transition toward greener, smarter equipment. In the realm of green manufacturing, the company’s newly developed “thin-walled component derusting and cleaning machine,” featuring a trolley‑type design, employs aluminum‑gear reinforcement technology to reduce shot consumption, bringing the energy consumption for derusting one ton of tubing down to 15 kWh—25% lower than the industry average. On the smart‑upgrade front, the next‑generation equipment will integrate an AI‑powered visual inspection system that detects surface defects in real time and automatically adjusts process parameters, marking a leap from “human‑controlled” operations to “data‑driven” production.

From equipment R&D to process innovation, and from the domestic market to global competition, Qingdao Hongchenghong leverages technology as its spear and quality as its shield, continuously driving transformation in the anti-corrosion and thermal insulation equipment industry. Each upgrade of its internal and external rust‑removal equipment not only precisely addresses engineering needs but also serves as a vivid demonstration of China’s manufacturing sector advancing toward high-end, intelligent solutions. Looking ahead, as green manufacturing and smart technologies converge, Qingdao Hongchenghong is poised to deliver more efficient and reliable “China‑made” solutions for pipeline projects worldwide.