The global petroleum industry operates in some of the most challenging environments on Earth—from ultra-deepwater offshore rigs to corrosive shale gas basins. In these high-stakes settings, the structural integrity of every valve, pump, and cable protector is non-negotiable. China Petroleum parts investment casting has emerged as the gold standard for manufacturing components that require "zero-fail" reliability, complex internal geometries, and superior surface finishes.
Investment casting, often referred to as lost-wax casting, offers a unique value proposition for oil and gas OEMs. Unlike sand casting, which may suffer from porosity and dimensional variability, precision investment casting ensures tight tolerances (ISO 8062 CT4-CT6) and the ability to use specialized alloys that withstand hydrogen sulfide (H2S) stress cracking and extreme pressure. As a leading manufacturer, JUNLONG Machinery Co., Ltd. integrates this advanced methodology with automated production to secure the global supply chain.
JUNLONG Machinery Co., Ltd. was founded in 2014. Located in Weifang, Shandong, the company covers a total area of 60,000 square meters and has an annual production capacity of 20,000 tons of precision castings and machined finished parts. It specializes in materials such as carbon steel, alloy steel, and stainless steel.
With over 200 employees, including more than 30 engineering technicians, the company is a high-quality casting supplier integrating precision casting and deep processing. We serve as a key supplier for industries such as automotive, rail transportation, engineering machinery, and petroleum machinery.
Modern petroleum procurement departments are shifting toward integrated suppliers who offer both casting and precision machining. By consolidating the "Cast-to-Finish" workflow, we reduce lead times by 30% and eliminate mid-process quality risks.
Demand for duplex stainless steel and high-nickel alloys is rising. Our facility specializes in creating corrosion-resistant parts that meet ASTM and API standards, essential for upstream drilling and downstream refinery operations.
We provide full documentation for global compliance, including Material Test Reports (MTRs) and Non-Destructive Testing (NDT) reports. Our exports to the US, Germany, Italy, and Canada adhere to strict regional industrial regulations.
Our engineering team utilizes solidification simulation software to predict and eliminate potential casting defects before the first wax pattern is even created. This "Digital Twin" approach ensures that complex petroleum parts—like impeller vanes and valve bodies—achieve perfect internal density.
The future of China's investment casting industry lies in environmental stewardship. We are integrating heat recovery systems and wax recycling technologies to minimize carbon footprints, aligning with the global ESG goals of major oil corporations.
As noted in our core advantages, we are equipped with horizontal and vertical machining centers, CNC lathes, and grinders. The roadmap involves moving toward 5-axis simultaneous machining to meet the micron-level tolerances required for next-gen smart oilfield sensors.
Our commitment to quality is backed by international certifications and a rigorous process control system.
ISO 9001 Certified
TS 16949 Compliance
UL Verified Quality
Furthermore, the company has obtained ISO 9001, TS 16949, UL, and other quality management system certifications, ensuring process control over every production detail and continuously pursuing and improving product quality to achieve high customer satisfaction.
Specialized cable protectors, clamps, and valve components for upstream exploration.
Wear-resistant parts for harvesters, excavators, and heavy-duty machinery.
High-tensile precision components for transportation infrastructure and engine systems.
Our company will continue to strengthen research and development efforts for new products and technologies, integrate advanced management and technical resources, build a powerful brand, and strive to become a world-class precision casting supplier!
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