Precision OEM/ODM silica sol castings, forged components, and high-tolerance CNC-machined pipeline fittings.
Established in 2013, Ningbo Yinzhou Haochu Machinery Manufacturing Co., Ltd. (HC MACHINE) is an ISO 9001 certified modern enterprise. We specialize in investment casting, forged steel components, and advanced CNC machining. Guided by precision engineering, we deliver zero-leakage, pressure-tight solutions to meet the demands of global pipelines and heavy industrial machinery.
Our state-of-the-art facilities leverage Silica Sol Investment Casting and precision forging to produce high-integrity oil pipeline fittings, forged steel unions, and LCC alloy steel valves. With sub-zero testing, chemical spectrometers, and Coordinate Measuring Machines (CMM), we supply pipeline operators and industrial OEMs worldwide.
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Engineering durable pipeline fittings designed to withstand high stress, extreme temperatures, and sour service environments.
Our silica sol investment casting ensures exceptional surface finish (Ra 3.2 or better) and precise near-net-shape geometries. This process minimizes machining times and guarantees the structural integrity required for critical oil and gas transport systems.
Forged steel unions and adapter fittings are manufactured with optimal grain flow alignment. This increases mechanical strength, fatigue resistance, and impact toughness, making them suitable for high-pressure operations.
Equipped with over 40 modern machining centers and precision grinders, we achieve tolerances down to 0.02mm. Threads like NPT, BSPT, and UNC are monitored to ensure tight, leak-free seals on-site.
Designed for low-temperature service with high impact energy, guaranteeing zero-leakage performance under extreme pressures.
Heavy-duty cast accessories engineered for agricultural, mining, and transport applications under high-vibration stresses.
Precision investment castings for valve internals, fluid control elements, and chemical pipeline interfaces.
Midstream pipeline projects require high reliability. A single component failure can lead to unplanned shutdowns, environmental impact, and safety hazards. Global enterprises search for suppliers that guarantee strict compliance with international manufacturing codes.
All castings and forgings must be traceable from the heat number to the finished part. We match ASME B16.11, ASTM A105, A350 LF2, and ASTM A352 LCC standards. This ensures compatibility with existing cross-country oil pipelines.
Crude oil containing high concentrations of hydrogen sulfide (sour crude) accelerates Sulfide Stress Cracking (SSC). Our materials undergo controlled heat treatments and hardness checks below 22 HRC to meet NACE MR0175/ISO 15156 guidelines.
Combining automation, raw material sourcing, and port logistics to optimize international lead times.
Our factory is located in Ningbo, Zhejiang, adjacent to one of the world's busiest container hubs. This geographical proximity reduces inland transport costs and streamlines customs clearance, ensuring faster shipping to global markets.
We control the complete manufacturing workflow under one roof. From pattern design and silica sol molding to induction melting, precision CNC milling, heat treatment, and anti-rust surface finishing (zinc plating, e-coating), we maintain control over quality and lead times.
Our deep partnerships with local alloy manufacturers allow us to stabilize raw material costs. Even during volatile global metal markets, HC Machine offers competitive pricing and maintains a continuous flow of high-grade steel, carbon steel, and bronze alloys.
Developing next-generation solutions for hydrogen blending, CCS networks, and digital quality monitoring.
Hydrogen embrittlement is a challenge for traditional pipeline steels. Our metallurgy team is developing low-carbon LCC steel and nickel-alloy components. These are optimized to handle hydrogen-natural gas blends without mechanical degradation.
Transporting supercritical CO2 requires high resistance to decompression and low temperatures. We are optimizing casting wall thicknesses and developing high-toughness alloy flanges designed to withstand extreme CO2 pressure drops.
We are designing fittings with dedicated slots for IoT temperature, pressure, and acoustic sensors. This enables pipeline operators to implement real-time predictive maintenance and structural health monitoring.
Our high-precision pipeline components and custom castings serve diverse global sectors.
High-strength forged unions, flanges, and tees. These components connect pipelines under high pressures and vibration, preventing fluid leakage during long-distance transit.
Casting solutions using Duplex stainless steel and nickel-alloy coatings. Our products resist pitting and crevice corrosion in deep seawater environments.
Machined gate, globe, and check valve bodies. Our components handle high temperatures and harsh chemical feeds without compromising seal integrity.
HC Machine is committed to becoming a global partner in high-end equipment manufacturing. We drive precision engineering with smart technologies, establishing industrial benchmarks by integrating casting, forging, and finish machining into one streamlined source.
By adopting automated casting processes and eco-friendly manufacturing setups, we support carbon-reduction goals while delivering high reliability to our international customers.
We mitigate procurement risks through strict adherence to compliance standards, transparent testing protocols, and complete material certification.
We perform Magnetic Particle Testing (MT), Dye Penetrant Testing (PT), Ultrasonic Testing (UT), and Radiographic Inspection (RT). These checks verify internal soundness and identify surface micro-cracks before dispatch.
Every batch of pipeline fittings is shipped with EN 10204 3.1 material certificates. These confirm chemical compositions, Charpy V-notch impact tests, and elongation parameters.
Our factory provides customizable coatings, including electro-zinc plating, hot-dip galvanization, and anti-rust oils. These treatments safeguard components during ocean shipping and long-term field storage.
Technical support, ordering processes, and quality assurance questions answered by our engineering department.
Our products are engineered in compliance with international standards, including ASME B16.11, API 6D, ASTM A105, ASTM A350 LF2, ASTM A352 LCC, and NACE MR0175/ISO 15156. We supply complete material traceability and EN 10204 3.1 certifications for every batch.
We use advanced CNC machining to keep critical tolerances down to 0.02mm. Machined valve components undergo hydrostatic and pneumatic pressure testing in line with API 598. This ensures bubble-tight sealing before shipment.
Our prototyping phase takes 7 to 12 days. For standard mass production batches, lead times average 30 to 45 days, depending on geometry complexity, volume, and raw material sourcing requirements.
Yes, we support low MOQ orders for custom-engineered castings and specific forged components. This accommodates engineering tests, pilot setups, and targeted repairs.
We offer silica sol investment casting for complex, close-tolerance components, and close-die forging for high-fatigue products like unions and tees. All components are finished using multi-axis CNC machines and automated grinding lines.
Depending on your specifications, we apply electro-zinc plating, anti-rust coatings, e-coating, or hot-dip galvanization. Finished parts are wrapped in vapor-corrosion-inhibitor (VCI) bags and packed into robust wooden crates.
Browse our selection of precision silica sol components, automotive elements, and forged steel unions.
Need engineering assistance for custom LCC steel castings or forged pipeline unions? Contact our engineering team in Ningbo for a fast response on drawings, dimensional requirements, and competitive pricing quotes.
Haochu Machinery