Inspection Robots Become 24/7 Extra Staff at Petrochemical Plants

On August 20, 2026, a customized explosion-proof wheeled inspection robot completed commissioning at Zhenhai Refining & Chemical's Smart Factory 3.0 project, entering routine service in the No. 4 polypropylene unit.

The robot employs intelligent visual recognition, automatic navigation, and autonomous data acquisition to replace humans in inspecting pumps, verifying valve positions, and detecting leaks below the central pipe rack. This deployment is part of a broader trend: from Guangdong Petrochemical to Urumqi Petrochemical, inspection robots are becoming the new "extra staff" for China's energy giants, monitoring the most dangerous corners with near-zero omission around the clock.

Guangdong Petrochemical's pipe rack patrol robot provides compelling comparative data.

Compared with manual inspection, the robot cuts response time from 30 minutes to second-level alarms, a 360-fold improvement. Missed detection drops from 3% to 0.1%, yielding a 30-fold reliability increase. Visual recognition error is much lower than human distance reading, improving data precision by 16 times. Gas leak sensitivity is raised two orders of magnitude, alarming at 1 ppm, far exceeding human capabilities.

Behind these figures lies a sensing system integrating high-definition cameras, thermal imaging, and multiple gas sensors. At Urumqi Petrochemical, explosion-proof rail-mounted and quadruped robots detect abnormal heating, read instruments, catch invisible oil-gas leaks, and even locate internal noises via acoustic imaging. They are no longer simple "mobile cameras," but comprehensive diagnostic tools that see, hear, smell, and analyze.

Petrochemical plants are not flat showrooms. Metal tanks block signals, passages are narrow and lined with pipe trenches, and robots must climb slopes. To handle such complex terrain, PetroChina deployed its first explosion-proof quadruped robot at Gansu's Xigu oil depot in May 2026. It conducts routine inspections in high-risk areas like tank bottoms and pump sheds. The quadruped design enables smooth traversal of stairs and narrow spaces, expanding coverage from points to areas.

In June 2026, PetroChina's Digital Intelligence Research Institute went further, adopting an "air-ground integrated" scheme at Sichuan Petrochemical, pairing quadruped robots with drones. Ground units inspect valves, flanges, and pipes, while aerial units check overhead points such as tank tops and flares.

When robots take over high-risk and repetitive patrols, human roles shift from operators to decision-makers. Data from the Wei 11 gas storage facility at Zhongyuan Oilfield, after eight months of operation, shows that robots work around the clock regardless of weather and automatically generate daily, weekly, and monthly reports. Previously, compiling such ledgers took two days; now it is exported with a mouse click. Frontline staff can focus more on risk assessment and contingency planning.

Zhenhai Refining & Chemical's situation is similar. Besides the wheeled robot, its smart factory has deployed other inspection robots like "Master Wang," enabling automated patrols in specific areas with real-time data upload to control centers. In 2025, Zhenhai was named a provincial AI application benchmark enterprise in Zhejiang.

Shanghai Petrochemical launched its first positive-pressure intelligent explosion-proof inspection robot in April 2026. It works with the earlier "Little Detective" system to form a multi-layered pattern of "key-point surveillance plus full-area coverage." This human-machine collaboration model is moving from pilots to routine.

Currently, inspection robots have become key options for new or revamped projects at Sinopec, PetroChina, and Yanchang Petroleum. Yanchang Energy's Yanchang refinery deployed intelligent inspection robots in high-risk methanol synthesis zones, achieving 24-hour unmanned monitoring and preventing personnel exposure to hazards. Guangdong Petrochemical plans to extend its pipe rack robot experience to tank farms and process areas, forming an interconnected inspection network.

As robots routinely navigate pipe racks, tank farms, and compressor rooms, the safety logic of the petrochemical industry is being rewritten. These machines do not seek drama; they require stability, precision, and tirelessness—the very qualities industrial sites need most.