ERW - API line
ERW Mills for API Line Pipe
American Petroleum Institute standard welded pipe for oil & gas transportation.
API pipe has stringent requirements for structural strength, corrosion resistance and heat treatment and hence pose a major challenge for the mill.
Our API ERW Tube Mill is an advanced production system engineered for manufacturing high-strength line pipes that meet the stringent standards of the American Petroleum Institute (API 5L / 5CT). Designed for precision, reliability, and heavy-duty performance, the mill delivers superior-quality pipes for oil and gas transportation, casing, and structural applications.
Equipment Overview
The API ERW tube mill integrates the latest forming and welding technologies to ensure consistent pipe geometry and weld integrity. The line includes uncoiler, shear & end welder, accumulator, precision forming section, high-frequency solid-state welder, seam normalizing furnace, online ultrasonic testing (UT), hydrostatic tester, and automatic cutting and bevelling system. Each section is controlled through a centralized PLC or HMI interface, enabling high automation, precise control, and real-time monitoring of production parameters.
Process Description
The production process begins with the uncoiling and edge preparation of hot-rolled steel strip. The strip is then continuously fed through forming rolls that gradually shape it into a round tube. The edges are heated using high-frequency current and welded together under pressure to form a uniform and defect-free seam. Post-welding, the tube passes through seam annealing and online NDT inspection to ensure the weld meets API specifications for toughness and strength. The pipe is then sized, straightened, hydro-tested, and end-finished before being bundled and dispatched.
Product Features
Pipes produced from our API ERW tube mill feature uniform wall thickness, high dimensional accuracy, and exceptional weld strength. They are capable of withstanding high internal pressures and harsh service environments, making them ideal for oil and gas pipelines, casing and tubing, and structural applications. Every pipe is tested and certified in accordance with API and international standards to guarantee safety and performance in critical operations.
API Tube Mill Lines Built to Global Standards
Forever Machinery has designed and manufactured multiple API mill lines trusted by operators across the oil and gas sector.
- Pipe sizes from ½" to 28" across a single integrated range
- Fully compliant with API 5L and ISO 3183 international standards
- Proven technology that protects your initial investment from day one
Internationally Recognized Quality
We pride ourselves in our 30 years' experience in roll form engineering and ERW tube mill design. We look after our customers every step of the way throughout the entire manufacturing lifecycle and offer our insights & services on optimizing their equipment.
ISO Certified Manufacturing
Strict adherence to global quality management systems.
30+ Years of Excellence
Decades of proven engineering and industrial innovation.
Global Export Network
Reliably delivering heavy machinery solutions worldwide.
API ERW Tube Mill
American Petroleum Institute standard welded pipe for oil & gas transportationAPI pipe has stringent requirements for structural strength, corrosion resistance and heat treatment and hence pose a major challenge for the mill.
Our API ERW Tube Mill is an advanced production system engineered for manufacturing high-strength line pipes that meet the stringent standards of the American Petroleum Institute (API 5L / 5CT). Designed for precision, reliability, and heavy-duty performance, the mill delivers superior-quality pipes for oil and gas transportation, casing, and structural applications.
The API ERW tube mill integrates the latest forming and welding technologies to ensure consistent pipe geometry and weld integrity. The line includes uncoiler, shear & end welder, accumulator, precision forming section, high-frequency solid-state welder, seam normalizing furnace, online ultrasonic testing (UT), hydrostatic tester, and automatic cutting and bevelling system. Each section is controlled through a centralized PLC or HMI interface, enabling high automation, precise control, and real-time monitoring of production parameters.
The production process begins with the uncoiling and edge preparation of hot-rolled steel strip. The strip is then continuously fed through forming rolls that gradually shape it into a round tube. The edges are heated using high-frequency current and welded together under pressure to form a uniform and defect-free seam. Post-welding, the tube passes through seam annealing and online NDT inspection to ensure the weld meets API specifications for toughness and strength. The pipe is then sized, straightened, hydro-tested, and end-finished before being bundled and dispatched.
Pipes produced from our API ERW tube mill feature uniform wall thickness, high dimensional accuracy, and exceptional weld strength. They are capable of withstanding high internal pressures and harsh service environments, making them ideal for oil and gas pipelines, casing and tubing, and structural applications. Every pipe is tested and certified in accordance with API and international standards to guarantee safety and performance in critical operations.