Chongqing Lianwai Technology Co., Ltd.

(I) Solution OverviewThe oil and gas pipeline welding solution addresses the harsh working conditions of onshore and offshore oil and gas pipeline construction and maintenance. It integrates high-power, high-stability engine-driven welding machines, pipeline-specific welding equipment, and auxiliary systems from Chongqing Lianwai Technology Co., Ltd., providing a comprehensive welding solution from pipeline prefabrication and on-site installation to post-construction maintenance. The solution boasts core advantages such as resistance to harsh environments, high-strength welding, and dual-station operation, meeting the high requirements of oil and gas pipeline welding for welding strength, sealing, and corrosion resistance, ensuring the long-term safe and stable operation of the pipeline system. (II) Core Equipment ConfigurationPipeline-Specific Welding Main UnitLWG600A Pipeline Welding Machine: Equipped with a 4-cylinder air-cooled engine, outputting AC230V/4Kw auxiliary power, with a welding current adjustment range of 30A-500A, suitable for welding oil and gas pipelines of different diameters and wall thicknesses; adopting a robust design, it adapts to complex environments such as outdoor, high-altitude, and low-temperature conditions. WD600 600A Pipe Welding Machine: 600A welding current, 36kW rated power, 1500rpm diesel engine drive, powerful and meets the needs of high-strength pipe welding; supports single/dual-station welding, improving on-site work efficiency. 800A Oil and Gas Pipeline Welding Generator: Provides AC 40kW auxiliary power output, suitable for efficient welding of large oil and gas pipelines, and can also meet the power supply needs of other equipment on site, achieving multi-purpose functionality. 600A Deutz Air-Cooled Welding Generator: Specifically designed for the maintenance of offshore oil and gas drilling platforms, with excellent resistance to salt spray and moisture, ensuring stable welding in harsh offshore environments. Multi-Process Welding Equipment: H400-Ⅱ 400A diesel engine driven multi-process welding machine and WD400-Ⅱ 400A dual-station pipe welding machine, supporting various welding processes such as manual arc welding, gas shielded welding, and flux-cored wire semi-automatic welding, adaptable to the welding needs of different parts of pipelines (joints, elbows, valves). Auxiliary Equipment GENWELD 110DPSC/141DPSC Diesel Mobile Screw Air Compressor: Provides stable compressed air, supporting gas supply for gas-shielded welding. 12.5-15 m³/min discharge capacity, 10-15 bar rated pressure, meeting the continuous air supply requirements of high-intensity welding; equipped with a Yuchai 118-140KW engine, meeting National IV emission standards, energy-saving and environmentally friendly. Diesel Welding Generator (400A/600A Series): 80L large-capacity fuel tank, strong endurance, suitable for long-term field operations; provides AC400V/16Kw three-phase and AC230V/6.9Kw single-phase auxiliary power to meet on-site lighting, tool power supply, etc. Welding Protection and Inspection Equipment: Suitable for outdoor operations, including anti-fall and waterproof welding masks, and pipeline weld flaw detection tools to ensure welding quality meets oil and gas pipeline industry standards. (III) Core Technological Advantages Powerful and Highly Adaptable: All equipment is powered by diesel engines, eliminating reliance on the power grid and making it suitable for remote onshore areas, offshore platforms, and other scenarios without electricity. The powerful engines can handle high-load welding operations, and the equipment exhibits excellent low-temperature start-up performance, adapting to working environments ranging from -20℃ to 50℃.  High-Precision Welding Control: Welding current and voltage are continuously adjustable, covering a range of 30A-800A, precisely matching welding parameters for different pipe diameters (from small to large oil and gas pipelines) and materials (carbon steel, alloy steel, stainless steel). Digital control technology ensures a stable welding process, uniform weld formation, and weld joint strength exceeding that of the pipe base material. Dual-Station and High-Efficiency Operation: Many models support simultaneous operation by two operators (e.g., the WD800 series 400Ax2 dual welding machine), significantly improving pipeline docking efficiency. The equipment is highly integrated and compact (e.g., some models have packaging dimensions of 1580x800x1050mm), facilitating on-site handling and installation. Safety and Durability: The equipment boasts an IP23 protection rating, providing dust and splash protection to withstand harsh outdoor conditions; its large fuel tank capacity (60L-80L) ensures long-lasting operation and reduces frequent refueling interruptions; it complies with oil and gas industry safety standards and features multiple protection functions including overload, overheating, and short-circuit protection. (IV) Applicable Scenarios: On-site installation and welding of long-distance onshore oil and gas pipelines; Construction and maintenance welding of offshore oil and gas drilling platforms and subsea oil and gas pipelines; Prefabrication and installation welding of oil and gas storage tanks, pump station pipeline systems; Emergency welding operations during oil and gas pipeline repair and rerouting. (V) Service Guarantee Customized Solution Design: Based on pipeline diameter, material, and operating conditions (onshore/offshore, temperature/humidity), we optimize welding processes and equipment configurations, providing integrated solutions combining prefabrication and on-site construction. On-site Technical Support: We dispatch professional technicians to the site to guide welding operations, assist in resolving on-site process challenges, and ensure welding quality meets standards. Equipment Operation and Maintenance Services: We provide regular equipment maintenance and fault repair services, establishing service points along oil and gas fields and pipelines for rapid response to maintenance needs. Training and Certification: We provide training for customer operators on equipment use, welding processes, and safety regulations, ensuring operators are qualified for their positions. Supply Chain Guarantee: We support bulk equipment procurement and emergency dispatch, providing comprehensive logistics solutions to ensure timely delivery of equipment to the site. III. About UsChongqing Lianwai Technology Co., Ltd. is a professional manufacturer and exporter of welding machines, generator sets, motorcycles, tillers, and other products. We have a professional design team, advanced automated production workshops, and a strict quality control system. We have passed RoHS certification, credit verification, and supplier capability assessment. The company possesses capabilities in product research and development, customized production, and full-process service. We can optimize solutions based on customer needs and provide flexible trade and cooperation models. Contact Information:Phone/WhatsApp: 13696424316Landline: 86-023-13696424316Email: lianwai2020@gmail.com

(I) Solution OverviewThe digital laser welding solution leverages the advanced digital technology and laser welding equipment R&D capabilities of Chongqing Lianwai Technology Co., Ltd., integrating a full range of IGBT inverter welding technology, multi-plate motion technology, 60% load rate design, and full-range digital control technology. It provides an integrated service encompassing precision welding, intelligent control, and data traceability for precision welding scenarios such as 0.12-2.0mm metal sheets, as well as the high-quality welding needs of various industrial metal components. The solution focuses on the digital management and efficient, stable output of the welding process, and can be widely applied in multiple fields such as electronics manufacturing, automotive parts processing, precision machinery, and medical devices, achieving non-deformation welding and high-precision splicing, meeting the stringent requirements of modern industry for welding quality, efficiency, and intelligence. (II) Core Equipment Configuration LW-J100 Intelligent Precision Cold Welding Machine: Designed specifically for 0.12-2.0mm thin metal sheets, it employs digital precision control technology to ensure deformation-free welding, guaranteeing the dimensional accuracy and appearance quality of precision components. Equipped with an intelligent parameter adjustment system, it automatically matches optimal welding parameters according to different materials (stainless steel, aluminum alloy, copper alloy, etc.), reducing the difficulty of manual operation. GENWELD LS-1500W Laser Descaling Machine: Efficiently removes oxide scale, oil, and other impurities from metal surfaces before welding, ensuring the purity of the weld joint and improving weld strength. It uses digital control of descaling power and range to adapt to the pretreatment needs of different workpiece specifications, forming a highly efficient synergy with laser welding equipment. Digital Welding Workstation: Integrates the laser welding host, intelligent robotic arm, vision positioning system, and data acquisition module to achieve automation and intelligence in the welding process. It supports continuous multi-station operation, accurately identifying the welding path through vision positioning, controlling errors to the micron level, and significantly improving welding consistency. Auxiliary Equipment: Equipped with IP23 protection-rated welding auxiliary devices to adapt to complex workshop environments; featuring a digital cooling system to monitor equipment temperature in real time, ensuring stability during long-term high-intensity welding. (III) Core Technological Advantages Full-Process Digital Control: From welding parameter setting and path planning to real-time data acquisition and feedback of current, voltage, and temperature during the welding process, achieving digital traceability of the entire welding process; supporting parameter storage and retrieval, capable of saving 100+ sets of welding process schemes to meet the needs of multi-variety, small-batch production. High-Precision and Low-Damage Welding: Laser welding energy is concentrated, resulting in a small heat-affected zone. Combined with the LW-J100's non-deformation welding technology, it effectively avoids workpiece deformation and cracking problems caused by traditional welding; the welded joint has high strength, and the weld seam is smooth and aesthetically pleasing, reducing subsequent grinding and other processing steps. Intelligent Adaptation and High-Efficiency Operation: Utilizing a full range of IGBT inverter technology, the welding current response is fast, adapting to the welding needs of workpieces with different materials and thicknesses. The digitally controlled multi-plate motion system supports continuous welding of complex curved surfaces and multiple weld seams, improving work efficiency by 30%-50% compared to traditional welding. Stable and Reliable Equipment Performance: All equipment undergoes rigorous quality testing, complies with international standards such as RoHS, and is equipped with a professional testing laboratory to ensure product quality. The equipment adopts a 60% load rate design, which can meet the needs of long-term high-intensity welding scenarios and reduce equipment failure rate. (IV) Applicable Scenarios: Micro-welding of precision electronic components and medical device parts; High-precision splicing of automotive body and engine parts; Assembly and welding of 0.12-2.0mm metal sheets (such as stainless steel plates and aluminum plates); High-quality welding of precision mechanical components and aerospace parts. (V) Service GuaranteeCustomized Solution Design: A professional design team will tailor welding processes and equipment configurations based on the customer's workpiece specifications, materials, and production needs.Full-cycle Technical Support: One-stop service covering equipment installation and commissioning, operator training, and welding process optimization to ensure rapid production commencement.Comprehensive After-sales Response: 24/7 technical consultation and timely on-site repair for equipment malfunctions to ensure production continuity.Flexible Cooperation Modes: Support for bulk purchasing and customized small packaging needs, offering various trade terms such as FOB and CIF.

Introduction to Welding Technical Parameters of LWG600A Diesel Welder Generator Welding Current Range: The LWG600A diesel welder generator has an extremely wide current adjustment range, which can be flexibly adjusted between 30A and 500A. This feature enables it to adapt to various welding scenarios, from fine thin-plate welding where a smaller current is used to prevent plate burn-through, to thick metal component welding where a larger current is applied to ensure the depth and strength of the weld seam, all can be easily handled. When welding 1mm thick thin plates, the current can be set between 30A and 50A to ensure the accuracy and stability of the welding; when welding 20mm thick plates, increasing the current to 400A - 500A can achieve a good welding effect. Rated Welding Current and Duty Cycle: Its rated welding current is 500A, and when the duty cycle reaches 60%, it can output a voltage of 40V; when the duty cycle is 100%, the rated welding current is 400A, corresponding to a voltage of 36V. This means that in long-term, high-load welding operations, such as large-scale steel structure projects, the equipment can operate stably and maintain an efficient welding state. For example, in bridge construction, the LWG600A can ensure the welding progress and quality with stable output during continuous hours of welding work. No-Load Voltage: The no-load voltage of the equipment is 76V. The relatively high no-load voltage helps to quickly establish an arc during welding arc striking, ensuring the smoothness and reliability of arc striking. Even when the electrode is in poor contact with the workpiece, it can easily strike the arc, laying a solid foundation for the smooth progress of welding work. Applicable Electrode Specifications: It can adapt to a wide range of electrode diameters from 1.5mm to 10.0mm, covering from extremely fine electrodes to thick electrodes. Whether using 1.5mm fine electrodes for precision welding or 10.0mm thick electrodes for welding large components, the equipment can provide appropriate current and voltage support to meet the usage requirements of different electrodes. Integration of Welding Processes: The LWG600A integrates a variety of advanced welding processes, including manual metal arc welding (MMA), cellulose electrode welding, tungsten inert gas welding (TIG), and carbon arc gouging, etc. In pipeline welding, cellulose electrode welding can be used for backing first, then manual metal arc welding for filling and capping; for welding stainless steel materials, the TIG welding process can ensure the beauty and corrosion resistance of the weld seam; and the carbon arc gouging function can be used for cleaning weld defects, opening grooves, etc. Convenience of Current and Voltage Adjustment: It is equipped with a welding current/voltage parameter preset function, allowing operators to conveniently preset the required parameters on the control panel according to the welding process requirements. At the same time, the current adjustment of the equipment has a rapid response, which can quickly adjust according to the actual situation during the welding process, ensuring the stability of the welding process and the consistency of welding quality. Dual Torch Operation Function: It supports the selection of single/dual torch operation modes, and the dual torches do not interfere with each other during operation. At large engineering construction sites, two welders can perform operations using different welding processes at the same time, which greatly improves work efficiency and saves construction space. For example, in the block construction of large ships, welding work on different parts can be carried out by two welders at the same time, accelerating the construction progress.