NEWS & EVENTS
Aogang Machinery Co., Ltd.
Aogang Machinery Co., Ltd.
Dec. 12, 2025
An ERW (Electric Resistance Welded) Tube Mill is a continuous production line that forms steel strip into round or square tubes using high-frequency resistance welding. The strip edges are heated by high-frequency current and forged together under pressure, creating a uniform and reliable weld.
ERW mills are suitable for carbon steel, low-alloy steel, and can produce round, square, and rectangular tubes for a wide range of industrial applications.
The entire line—from uncoiling and forming to welding, sizing, and cutting—operates continuously and automatically. Compared with seamless pipe manufacturing, ERW production offers faster speed, higher material utilization, and significantly lower cost.
High-frequency welding delivers a strong and uniform weld seam. Optional online heat treatment helps match weld properties to the base metal. UT/ET non-destructive testing systems enable real-time quality control.
Quick-change roll systems and preset parameters allow fast size transitions, ideal for multi-spec, small-batch, or customized orders.
ERW welding does not require heating the entire strip, resulting in lower energy consumption and reduced emissions.
Used in line pipes, casing, refinery piping, and systems requiring high strength and excellent sealing performance.
Widely applied in stadiums, airports, scaffolding, guardrails, and building frameworks.
Suitable for hydraulic cylinders, automotive chassis, driveshafts, and exhaust systems where precision and consistency are essential.
Commonly used in water supply, HVAC, gas pipelines, furniture frames, and storage systems.
The steel coil is uncoiled and leveled to ensure flatness before forming.
Coil ends are joined by flash welding or TIG welding to enable nonstop production.
Stores material during end welding and keeps the forming section running continuously.
The strip passes through multiple forming stands to create an open-seam tube.
Edges are heated by HF current and forged together under squeeze rollers.
Beads are trimmed to ensure a smooth internal surface and clean outer appearance.
Sizing stands ensure dimensional accuracy, while straighteners improve tube straightness.
A flying saw cuts the tube in sync with line speed, followed by automatic bundling and marking.
High-rigidity stands and precision rolls guarantee consistent geometry. Real-time monitoring enhances weld stability.
Supports quick roll changes and multi-spec production with minimal downtime.
Weld seam heat treatment
UT/ET non-destructive testing
Hydrostatic testing when required
Ensures every tube meets applicable standards.
Digital monitoring provides real-time data on energy usage, machine status, and production efficiency.
Durable components, energy-efficient drive systems, and simplified maintenance deliver higher lifecycle value.
Configurations include multi-stage NDT systems, hydrostatic testers, and advanced quality monitoring modules.
Solutions feature high-rigidity sizing stands, servo flying saws, and tight tolerance control for precision tubes.
Optimized for high-speed and large-volume production with automated bundling systems.
Cost-efficient, standard configurations designed for stable production and lower initial investment.
Aogang provides engineering guidance, spare-parts support, installation services, and remote technical assistance. We aim to be your long-term partner for reliable tube production.
Custom-designed tube mill solutions for your production needs
