Type of welded steel pipe manufacturing machine

Welded Steel Pipe Making Machine is the core equipment in the field of steel processing, which is widely used in oil, gas, construction, municipal engineering and other industries. The core process is to process steel strips or steel plates into steel tubes of different specifications through forming, welding and finishing steps. According to the different welding methods, forming processes and application scenarios, welded steel pipe manufacturing machines can be divided into many types. The following will introduce several mainstream devices and their technical characteristics in detail.

First, high-frequency resistance welding Machine (ERW/HFW Machine)
How it works ‌ :
High-Frequency Resistance Welding (HFW) or HF Induction Welding (HF Induction Welding) is the main technology. The skin effect and proximity effect are generated on the edge of the steel strip by high frequency current, so that the metal quickly heats up to the molten state, and then the welding is completed by pressing the extrusion roller.
Technical features ‌ :
High efficiency and energy saving ‌ : the welding speed can reach 20-120 m/min, suitable for continuous mass production.
Applicable material ‌ : carbon steel, stainless steel, alloy steel, etc., wall thickness is usually 0.5-20mm, diameter range of 10-630mm.
Weld quality ‌ : the weld is smooth and the heat affected zone is small, but the current and pressure should be strictly controlled to avoid unfused defects.
Two, Continuous Welding Line (Continuous Welding Line)
How it works ‌ :
Integrate uncoiling, leveling, forming, welding, sizing, cutting and other processes to achieve fully automated production. Usually high frequency welding or TIG welding is used.
Technical features ‌ :
High degree of automation ‌ : Reduces manual intervention and improves consistency.
Flexibility ‌ : By replacing the mold can produce square pipe, rectangular pipe and other profiles.
Energy-saving design ‌ : Some models are equipped with waste heat recovery system.
Third, Stainless Steel Pipe Mill (Stainless Steel Pipe Mill)
Special technology ‌ :
TIG welding (inert gas shielded welding) ‌ : no oxidation of the weld, suitable for food grade pipelines.
Plasma welding ‌ : For high alloy materials, welding speed is faster.
Online solution treatment ‌ : some models integrated heat treatment to improve corrosion resistance.

With the development of intelligent and green manufacturing, modern pipe welding machine is evolving in the direction of ‌ digital control ‌ (such as online weld monitoring), ‌ energy saving and consumption reduction ‌ (high-frequency inverter technology) and ‌ multi-function integration ‌ (continuous casting and rolling integration). The user needs to choose the appropriate type of pipe welding machine according to the material characteristics, pipe specifications and use environment, and pay attention to the energy efficiency ratio and automation level of the equipment to improve the production competitiveness.