In this technological field, shot blasting equipment focused on pipeline treatment is of particular importance. Steel pipes, as the core carriers of oil and gas transportation and urban infrastructure, have their service life and safety performance directly affected by the cleanliness of their inner and outer walls. The QG series steel pipe inner and outer wall shot blasting machines developed by Qingdao Puhua Heavy Industry Machinery Co., Ltd. are a professional solution specifically designed to address this industry pain point.
Traditional pipeline cleaning often requires separate treatment of the inner and outer walls, which is inefficient and makes it difficult to guarantee consistent quality. The QG series equipment employs a unique synchronous cleaning technology. While the steel pipe rotates forward at a uniform speed, its outer wall undergoes a multi-angle shot blasting process, while the inner wall is continuously shot-blasted via a retractable spray bar system, achieving highly efficient operation with a single loading and simultaneous completion.
The equipment features a modular design, capable of processing various steel pipes with diameters ranging from 100 mm to 2.2 meters and lengths up to 18 meters. Whether it's large-diameter pipelines for oil transportation or medium-sized pipes for building structures, a suitable machine configuration can be found. A specially designed clamping system ensures that thin-walled pipes do not deform during high-speed cleaning.
According to actual testing, the cleanliness of the treated steel pipe's inner and outer surfaces consistently reaches Sa2.5 level (ISO 8501-1 standard), with surface roughness controlled within the optimal range of 30-75 microns, providing an ideal adhesion substrate for various anti-corrosion coatings such as epoxy resin and polyethylene.
The equipment is equipped with a four-stage dust removal system: gravity settling chamber, cyclone separator, cartridge dust collector, and end-of-line HEPA filter, ensuring dust emission concentrations are below 10 mg/m³, only half the national standard limit. The fully enclosed operating environment with negative pressure design completely eliminates dust pollution at the work site.
In a natural gas pipeline project in Southwest China, X80 grade steel pipes treated with QG equipment achieved a coating peel strength exceeding 15 MPa, verified by a third-party testing agency, far exceeding the industry standard requirement of 8 MPa. The equipment operated continuously for three months, treating a cumulative pipeline length of over 150 kilometers.
In a heating system renovation project in a provincial capital city, QG equipment achieved a zero-leakage record for insulated pipelines. Unique shot blasting parameter settings thoroughly removed rust while perfectly preserving the original pipe wall thickness, saving the project millions of yuan in pipe replacement costs.
For chemical plants, pipelines transporting corrosive media are treated with this equipment and then protected with a special coating. This extends their service life from the original 3-5 years to 8-10 years, significantly reducing maintenance costs and downtime risks.
The intelligent control system equipped with the equipment has the following features:
Parameter Memory Function: Stores processing solutions for over 50 different materials and specifications of steel pipes.
Real-time Monitoring System: Simultaneously displays key parameters such as shot blasting intensity and travel speed of the inner and outer walls.
Fault Early Warning Mechanism: Provides early warnings of potential problems such as shot blaster wear and insufficient shot.
Production Data Traceability: Automatically generates a complete report including processing time, energy consumption, and shot consumption.
From equipment selection to long-term maintenance, we provide full-cycle service support:
Initial Technical Consultation: Our engineering team provides free site planning solutions.
Installation and Commissioning Guarantee: Professional team provides on-site installation to ensure design performance.
Operational Skills Training: A complete curriculum system combining theoretical teaching and practical training.
Preventive Maintenance Plan: Personalized maintenance plans are developed based on usage frequency.
Rapid Response Mechanism: 12 service centers nationwide, with 4-hour emergency fault response.
With the large-scale advancement of oil and gas pipeline networks and urban underground utility tunnels during my country's "14th Five-Year Plan" period, pipeline processing equipment is developing towards intelligence and energy conservation. Qingdao Puhua Heavy Industry's R&D team is focusing on developing a new generation of intelligent shot blasting systems. This system will integrate machine vision technology to automatically identify pipeline corrosion levels and adjust processing parameters, potentially increasing processing efficiency by another 25%.
In pipeline engineering construction, initial equipment investment often accounts for only a small portion of the overall project cost, but equipment selection directly impacts project quality and long-term operation and maintenance costs. The QG series steel pipe internal and external wall shot blasting machines, with their stable processing quality, high-efficiency operation capabilities, and comprehensive service system, are becoming the designated equipment for an increasing number of key projects.
Qingdao Puhua Heavy Industry will continue to deepen its expertise in pipeline treatment technology, providing equipment support for the high-quality transformation of Chinese manufacturing through continuous technological innovation and service upgrades. We sincerely invite partners from all industries to visit and experience firsthand the quality transformation brought about by professional shot blasting equipment.
