In the extreme industrial scenarios of offshore drilling, nuclear power construction, and large-scale infrastructure projects, processing extra-large-diameter, thick-walled pipes demands equipment that combines unparalleled power, micron-level precision, and rugged reliability. The 350 pipe end forming machine emerges as the industry’s benchmark solution, engineered to handle pipes up to 350 mm in outer diameter and thick-walled materials with extreme forming forces. Designed for industries spanning petrochemical, marine engineering, and renewable energy, this ultra-heavy-duty machinery redefines the limits of pipe processing by delivering seamless, leak-tight connections and complex forming operations that meet the most stringent international standards.

What is a 350 Pipe end forming machine?

A 350 pipe end forming machine is a specialized ultra-heavy-duty industrial tool designed to reshape, finish, and modify the ends of metal pipes and tubes, distinguished by its“350”designation and exceptional performance capabilities. The“350”primarily references the machine’s maximum processing outer diameter—up to 350 mm—setting it apart from smaller 180 or 260-series models that handle narrower pipes. It also signifies its ultra-high forming force capacity and compatibility with extra-thick-walled materials, making it the go-to choice for applications that exceed the limits of standard heavy-duty machines.

This machine integrates advanced hydraulic or pneumatic power systems, high-precision CNC controls, and rugged tooling to automate a comprehensive range of forming operations. Key processes include expanding, shrinking, flaring, bulging, upsetting, sealing, chamfering, and beveling—with specialized capabilities for single V, double V, J, and U-type bevels critical for high-strength welding. Unlike traditional methods such as welding or threading, it forms pipe ends directly to create seamless, one-piece connections that are 30% stronger and more leak-resistant, a critical advantage in high-pressure, high-temperature, or corrosive environments.

Built with reinforced I-beam frames and heavy-duty casting structures, the 350 pipe end forming machine supports a wide range of materials including carbon steel, stainless steel, alloy steel, titanium, and exotic alloys like Inconel. It caters to both high-volume mass production and custom small-batch work, with options for manual, semi-automatic, or fully automatic operation—including integration with robotic loading/unloading systems for continuous production. Some advanced models feature a 180-degree rotating carriage for efficient two-end processing, completing pipe end forming on both sides without reloading, while explosion-proof configurations are available for flammable and explosive workplaces like petrochemical plants.

Core Working Principles of the 350 Pipe End Forming Machine

The 350 pipe end forming machine’s exceptional performance stems from synchronized mechanical, hydraulic/pneumatic, and electrical systems, optimized for ultra-heavy-duty processing while maintaining micron-level precision. While specific mechanisms vary by manufacturer, the fundamental process follows five key stages:

1. Material Preparation and Loading

The process begins with preparing the pipe—cutting it to the required length and deburring to remove surface imperfections that could compromise forming quality. Given the large diameter and heavy weight of the pipes, the machine is equipped with hydraulic elevating devices and automatic conveyors or robotic arms to assist with positioning, reducing operator fatigue and ensuring accurate alignment. Many models support multi-station processing, enabling sequential operations like cutting, chamfering, and flaring in a single pass for enhanced efficiency.

2. Precision Positioning

Accurate positioning is critical for uniform results, especially with large-diameter pipes where even minor misalignment can lead to defective connections. The machine uses automatic self-centering 3-claw chucks and hydraulic backstops to set the exact segment of the pipe to be formed. The self-centering function ensures the pipe is perfectly aligned with the forming dies, eliminating dimensional variations across batches. Advanced models integrate linear encoders and optical 尺 for real-time position monitoring, maintaining ±0.05 mm accuracy even with pipes at the 350 mm diameter limit.

3. Secure Clamping

Once positioned, the pipe is clamped firmly to prevent slippage during high-force forming. The clamping system features reinforced 2-jaw, 3-jaw, or 4-jaw configurations driven by high-pressure hydraulic cylinders, applying adjustable force ranging from 15-30 KG/CM². This adjustability allows the machine to handle delicate titanium pipes and extra-thick-walled stainless steel pipes with equal stability. A pressure-locking mechanism ensures the clamp remains secure throughout the forming process, preventing deformation or misalignment even under maximum forming force.

4. Ultra-High-Force Forming

The forming stage is powered by a heavy-duty hydraulic or pneumatic system delivering up to 500 tons of thrust—enough to reshape thick-walled pipes and high-strength alloys without compromising structural integrity. Under CNC control, precision split dies execute customizable operations by exerting uniform pressure on the pipe end:

Expanding: Enlarging the diameter to create connections or fit over components.

Shrinking: Reducing the diameter for tight fittings or sealing in high-pressure systems.

Flaring: Forming tapered, leak-tight ends for hydraulic or pneumatic connections, critical for LNG transport systems.

Beveling: Creating single V, double V, J, or U-type bevels for welding preparation—processing a 350 mm diameter, 25 mm thick stainless steel pipe in just minutes.

Bulging/upsetting: Forming raised sections or connections for structural reinforcement, ideal for wind power assembly.

The forming speed is adjustable via flow control valves, with cycle times ranging from 5–30 seconds depending on the complexity of the operation. Some models feature a rotary cum push-type design that adds die rotation for smoother forming and improved surface finish, while cold cutting technology ensures the pipe material properties remain unaltered.

5. Mold Release and Unloading

After forming is complete, the hydraulic/pneumatic system retracts the dies and releases the clamp. The finished pipe is unloaded manually or via automatic conveyors—with the 180-degree rotating carriage on select models enabling quick flipping for two-end processing, cutting cycle time in half. Quick-change die systems reduce setup time by 40%, allowing operators to switch between forming operations in minutes. The machine’s integrated cooling system and oil temperature monitoring prevent overheating during continuous operation, ensuring consistent performance even in 24/7 production environments.

Key Advantages of the 350 Pipe End Forming Machine

Compared to smaller pipe end forming machines and traditional processing methods, the 350 pipe end forming machine offers unique advantages that drive efficiency, cost savings, and reliability in ultra-heavy-duty applications:

1. Ultra-Heavy-Duty Capacity for Large-Diameter Pipes

The machine’s ability to process pipes up to 350 mm in diameter and 130 mm thick fills a critical gap in industrial manufacturing. It handles extra-large-diameter pipes that smaller 180/260-series machines can’t accommodate, eliminating the need for manual processing or multiple equipment passes. This capability is essential for industries like offshore oil and gas, nuclear power, and wind energy that rely on large-scale piping systems.

2. Superior Precision and Consistency

Equipped with CNC controls, self-centering chucks, and linear encoders, the 350 pipe end forming machine delivers ±0.05 mm – ±0.1 mm forming accuracy. This consistency eliminates variability from manual processing, reducing scrap rates from 3% to 0.5% for high-volume producers. The uniform pressure distribution from split dies ensures smooth, burr-free finishes that meet strict international standards like ISO and ASME.

3. Enhanced Production Efficiency

The machine’s automation and multi-station capabilities significantly boost throughput. Heavy-duty models process up to 800 simple-formed pipes per hour, while complex beveling operations are completed in minutes—5x faster than manual methods. The 180-degree rotating carriage enables two-end processing without reloading, cutting cycle times in half for long pipe runs. Quick-change tooling and programmable presets reduce setup time by 40%, minimizing downtime between jobs.

4. Versatility Across Materials and Hazardous Environments

The 350 pipe end forming machine supports a wide range of materials—from lightweight aluminum to heavy-duty Inconel and titanium—and executes multiple forming operations with interchangeable dies. It adapts to diverse production environments, from factory floors to on-site construction sites, with portable and explosion-proof options available for flammable, explosive, or narrow-space applications. Custom die options allow for specialized shapes like concave, convex, square, and tapered ends, meeting unique project requirements.

5. Stronger, Leak-Tight Connections for Extreme Conditions

By forming pipe ends directly (rather than joining separate, the machine creates seamless, one-piece connections with no weak points. These connections resist leaks even in extreme conditions—high pressure (up to 70 MPa), low temperature, and corrosive environments—critical for industries like LNG transport and nuclear power. For offshore platforms, this reduces the risk of fatigue cracks and environmental damage, while in wind energy applications, 榫卯式 connections enable quick on-site assembly.

6. Significant Cost Savings

The machine delivers substantial cost reductions in multiple ways:

Material savings: Eliminates the need for fittings, reducing material costs by 15–20% and welding joint by 40%.

Labor savings: Automates tasks that would require 3–4 workers, cutting labor costs by up to 60% and reducing labor intensity.

Energy efficiency: Hydraulic systems with integrated oil manifolds reduce power consumption by 10–15% compared to older models.

Reduced downtime: Predictive maintenance alerts and durable construction minimize unplanned downtime by 25%, while quick tool changes boost overall equipment efficiency.

7. User-Friendly Operation and Safety Compliance

Intuitive touchscreen interfaces with programmable presets simplify setup, even for operators with limited technical expertise. Manual override functions allow adjustments for custom jobs, balancing automation with flexibility. Safety features—including emergency stops, protective enclosures, and explosion-proof designs—comply with global industrial standards, minimizing accident risks in hazardous workplaces. Ergonomic design elements like hydraulic elevators reduce operator fatigue during heavy pipe handling.

8. Industry 4.0 Compatibility for Smart Manufacturing

Leading models integrate with Industry 4.0 systems via TCP/IP communication and barcode readers, enabling real-time production monitoring. Operators can track cycle times, material usage, and machine performance, while simulation and collision control features prevent errors. Data analytics support continuous process optimization, aligning with modern smart factory initiatives and enabling seamless integration with CAD systems and measuring machines.

Industry Applications of the 350 Pipe End Forming Machine

The 350 pipe end forming machine’s combination of ultra-heavy-duty capacity, precision, and versatility makes it indispensable across industries that require large-diameter pipe processing in extreme conditions. Below are the key sectors where this machine excels:

1. Petrochemical and Oil & Gas Industry

The petrochemical and oil & gas sector relies on robust piping for drilling, production, and hydrocarbon transportation. The machine creates leak-tight connections for offshore platforms, onshore refineries, and natural gas pipelines, withstanding high pressure and corrosive environments. Explosion-proof models are ideal for flammable workplaces, while portable configurations support on-site maintenance and emergency repairs. It processes thick-walled pipes for systems, reducing welding joints by 40% and minimizing fatigue crack risks in deep-sea environments.

2. Nuclear Power Industry

Nuclear power plants require precision piping for cooling systems, steam generators, and fuel transport. The machine processes titanium and stainless steel pipes with ±0.05 mm accuracy, forming thin-walled 0.5 mm that balance strength and weight reduction. It meets strict international nuclear safety standards, ensuring connections can withstand high temperature, pressure, and radiation. The machine’s ability to create leak-tight joints is critical for preventing coolant leaks and ensuring plant safety.

3. Renewable Energy Industry

The renewable energy sector—particularly wind and hydrogen energy—relies on the 350 pipe end forming machine for large-scale infrastructure. Wind power use the machine to form connections, enabling quick on-site assembly and shortening offshore construction cycles by 20 days. Hydrogen systems benefit from precision-threaded interfaces that withstand 70 MPa pressure and -40℃，ensuring safe hydrogen transport. The machine also processes large-diameter pipes for solar thermal energy systems and hydroelectric power plants.

4. Marine and Shipbuilding Industry

Shipbuilding and marine engineering require pipes that resist saltwater corrosion, vibration, and extreme pressure. The machine produces components for ship hydraulic systems, fuel lines, and ballast tanks, processing thick-walled stainless steel pipes up to 350 mm in diameter. Its precision forming ensures leak-tight connections that prevent water ingress, while multi-station processing accelerates production of long pipe runs for large vessels like LNG transport ships. The machine’s ability to handle exotic alloys makes it suitable for offshore support vessels and drilling rigs.