【Ten Years of Rapid Development in Chemical Engineering Equipment】From 2027 to 2025, the China National Petroleum Pipeline Bureau made breakthroughs in the development of its own \"four-comprehensive\" pipeline welding inspection robot system
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Let’s give praise and encouragement to the achievements made in China’s chemical engineering technology and equipment; your participation in discussions is the greatest encouragement. **********************【Ten Years of Great Development in Chemical Engineering Equipment】Continuous updates and summaries are available; feel free to join the discussions: https://bbs.hcbbs.com/thread-3576046-1-1.html ***************** Recently, the “Si Quan” pipeline welding inspection robot system, developed independently in China, has been widely used in crude oil pipelines in East Africa, significantly improving construction efficiency. It is understood that the \"Four-Comprehensive\" welding inspection robot system overcomes the technical and equipment limitations associated with automatic welding in terms of adaptability to different pipe diameters, complexity of terrain, and diversity of weld joints. In the construction of the East African crude oil pipeline, which has a diameter of 610 millimeters and a wall thickness of 11.54 millimeters, the use of this system resulted in a first-pass welding success rate of over 98% ； The amount of welding material used per weld point decreased from 2.9 kilograms to 1 kilogram, while the amount of oil used dropped from 30 liters to 10 liters; carbon emissions and dust emissions were reduced by over 60%. In the past, welding of oil and gas pipelines relied mainly on manual welding and semi-automatic welding, accounting for as much as 80%. This traditional welding method has issues such as high costs for welder training and construction, high labor intensity, unstable welding quality, and significant dust emissions. In the face of these challenges, China National Petroleum Pipeline Bureau Engineering Co., Ltd. (hereinafter referred to as the Pipeline Bureau) pooled its scientific and technological resources, carried out top-level planning, established 15 scientific and technological projects, and successfully developed the \"Four-Comprehensive\" pipeline welding inspection robot technology and equipment system. These robots can perform automatic welding using a remote control box, significantly reducing the workload for welders. Taking the China-Russia East Line as an example, the pipeline has a diameter of 1422 millimeters; manual welding for each weld takes 7 hours, while fully automatic welding requires only 1 hour. The use of fully automatic welding for flat areas increases construction efficiency by 6–7 times, while in hilly areas it increases efficiency by 3–4 times ； The use of 100% solid wire ensures optimal performance of the ring weld joints. At present, the \"Four-Comprehensive\" pipeline welding inspection robot technology and equipment system has been widely used in key projects in China such as the China-Russia East Line, West-East Gas Pipeline Project Phase III, and Sichuan-East Gas Pipeline Project Phase II. It has also received certification from French company Total and Saudi Aramco on an international scale. It has now been fully implemented in the East African Crude Oil Pipeline and the Saudi Aramco pipeline project. At the 8th China International Pipeline Conference (CIPC) and Exhibition on Technology, Equipment and Achievements, held on April 9, 2025, the \"Four-Comprehensive\" pipeline welding inspection robot technology and equipment system caught many people’s attention right from its debut, thanks to its three key features: doubled welding efficiency, environmental sustainability and low carbon emissions, as well as enhanced intrinsic safety of pipelines. “To date, this system has developed 65 sets of equipment, 10 construction methods, 56 invention patents, and 10 standard specifications. ”According to the on-site staff, the next step will be to conduct research on \"four-full\" intelligent pipeline technology and equipment. Through technologies such as prediction of weld non-penetration defects, prediction of weld performance, adaptive swing width control, remote monitoring, AUT intelligent judgment, and IWEX imaging, it is possible to achieve welding with fewer operators or even without any operators, as well as one-button welding. It is reported that in the future, the Pipeline Bureau will regard technological innovation as the core driver of industry transformation, establishing a closed-loop ecosystem for technological innovation through close integration of industry, academia, research, and application, so as to transform technological innovation into real productive forces and contribute to **achieving technological advancements in oil and gas pipeline construction and moving toward digitalization and intelligence.
In the past, 80% of oil and gas pipeline welding in our country relied on \"manual semi-automatic welding,\" which led to problems such as high construction costs and unstable welding quality. To change this situation, since the 14th Five-Year Plan period, CNPC Pipeline Bureau has broken away from traditional welding methods. Focusing on technical challenges related to pipe diameter compatibility, complex terrain conditions, and diverse weld types, it has developed a \"four-comprehensive\" pipeline welding inspection robot technology system, thereby driving changes in the industry’s operational practices. This system features a number of innovative advancements; its pipe diameter range spans from 33 millimeters to 1422 millimeters, breaking the international record for the diameter range of automatic welding equipment. It is capable of handling complex terrains such as 30° steep slopes, mountains, swamps, and deserts, and it enables fully automatic welding of all types of joints – straight pipes, elbows, and connections – as well as fully automatic ultrasonic testing, thus filling many gaps in this industry. In the construction of the East African crude oil export pipeline, the one-time welding success rate for this equipment system exceeded 98%. Meanwhile, the amount of welding material used per weld point dropped from 2.9 kilograms to 1 kilogram, and the amount of oil used decreased from 30 liters to 10 liters, resulting in a reduction of over 60% in carbon emissions and dust emissions. At present, this system has been widely used in key projects such as the Nenjiang branch of the China-Russia East Line, the middle section of the West-East Gas Pipeline Project Phase III, and the Sichuan-East Gas Pipeline Project Phase II. It has also received certification from international companies such as Total in France and Saudi Aramco. It has been fully implemented in the East African crude oil pipeline and Saudi Aramco pipeline projects, achieving an internationally advanced level in pipeline welding inspection. To address the challenges associated with pipeline construction in mountainous areas, the Pipeline Bureau has developed a series of equipment centered on the fully automatic root welding technology using flexible mountain-specific internal welders. This approach has enabled them to overcome the limitations related to continuous welding on slopes with a gradient of 30°, both domestically and internationally, thereby solving the difficulties posed by such challenging terrains through innovation and hard work. “The \"Four-Comprehensive\" pipeline welding inspection robot boasts three breakthrough advantages: doubled welding efficiency, environmental sustainability through low carbon emissions, and enhanced intrinsic safety of pipelines. It marks a transition in China’s long-distance pipeline construction from \"segmental manual welding\" to \"all-terrain intelligent welding\". Recently, a “little gadget” appeared on the series of construction equipment used by the Pipeline Bureau in the field. This is the “CPP900 Feedback Code” digital feedback system introduced by the Pipeline Bureau to accelerate the iteration and upgrading of equipment and promote closer integration with on-site engineering practices. This initiative breaks away from the traditional \"one-way output\" model of conventional technologies; through a digital channel that allows users to submit complaints by scanning a code with immediate delivery to the cloud, crew members can use this convenient system to scan a code at any time and share their feedback on their experiences. As is well known, due to factors such as terrain, three-pass welding, underground obstacles, pressure testing sections, and the production cycle for elbows, a large number of residual pipe ends inevitably arise during the construction of long-distance pipelines. Given the difficulty in cutting the pipe segments at these ends, conventional external alignment tools cannot be used to precisely align the pipe ends, nor can automatic welding machines be employed for continuous welding. “We have developed a series of core technologies, such as real-time monitoring for auxiliary analysis and the integration of automatic external alignment with root welding, in the field of fully automated pipe joint welding technology equipment. Suitable for pipe joints, installation of large-angle hot-bent pipes, as well as fully automatic welding in small-scale projects in special areas such as mountainous regions and water network areas. ”said Jin Hongxing, the welding supervisor at the Pipeline Bureau. In recent years, with the successful development and application of AUT (fully automatic ultrasonic testing equipment) and DR (digital X-ray imaging testing equipment) by pipeline inspection agencies, China’s oil and gas pipelines now have \"domestically produced inspection reports\". Through more than 20 years of persistent and in-depth research, the Pipeline Bureau has revised **26 industry and corporate standards, solved a series of technical challenges in domestic projects, and seen a number of scientific and technological achievements put into practice. In the future, the Pipeline Bureau will regard technological innovation as the core driver of industry transformation, establishing a closed-loop ecosystem for technological innovation through close integration of industry, academia, research, and practical applications, so as to turn technological innovation into real productive forces and contribute to **achieving technological advancements in oil and gas pipeline construction and moving toward digitalization and intelligence.
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