• straight seam HF welded pipe machine System 1
  • straight seam HF welded pipe machine System 2
  • straight seam HF welded pipe machine System 3
straight seam HF welded pipe machine

straight seam HF welded pipe machine

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The introduction of straight seam HF welded pipe mill

The plate in certain width afterslitting line and stripping is unfolded and bent into pipe state. The edge ofthe steel plate is melted by making use of the proximity effect and skin effectof high frequency current. Then, the plate is extruded and welded into the pipeby extruding roller. Straight seam welded pipe mill also is called ERW mill.

The forming styles of straightseam welded pipe can be divided into roll

forming,cage forming, flexible forming, full auto flexibleforming. The mill developed by our company adopts roll forming when havingsmall diameter (Φ≤114) The cageforming is adopted when having middle or small diameter (Φ≤165). Full auto flexible forming is adoptedwhen having large diameter(Φ≤711).

According to the productsfunctions, straight seam welded pipe mills are divided into API model, nationalstandard model.

API model mainly produces highlevel steel pipes, such as delivery pipe of petroleum and natural gas, oil wellcasing and so on. The requirements for material and quality are very strict.The mill is equipped with section equipment and technological equipment, suchas IF annealing, air-cooled roll table, ultrasonic inspection, and highpressure hydraulic pressure testing machine, and drifter and so on.

National standard model mainlyproduces the steel pipe, such as water-gas pipe, structure pipe and so on.


Q:What is the surface rolling forming machine process?
The rolling process using metal at room temperature, cold plastic characteristic, through the rolling tool is the rolling tool to put some pressure on the metal surface, so that the workpiece surface by plastic deformation, the height to the lower tissue slip, the surface roughness decreased.
Q:Improvement in rolling forming process
The utility model has the advantages of short service life, easy damage and high comprehensive use cost.
Q:A roll forming machine, rolling out of the length is always not up to a fixed size, not too small, that is, more than that, what is the cause?
Maybe there is something wrong with that roller. It rolls out of the wrong angle and the size will be out of order.
Q:What kind of material and what heat treatment are used for pressing roller (molding, feeding, cutting force, heavy load, heavy load) of sheet steel rolling machine?
Generally speaking, to consider the use of rollers in the requirements, including: 1., good wear resistance, 2. toughness, 3., high hardness, 4. hardened layer (easy to wear after repeated repair)
Q:Process mould for rolling forming process
Press forming is an advanced processing technology, and its remarkable characteristics have been paid attention to by the automobile industry at home and abroad.
Q:What is rolling forming processing?
Rolling process is a kind of pressure finishing, which is a kind of cold plastic characteristic of metal under normal condition.
Q:Material and equipment for roll forming process
The most common type of roll forming is reciprocating flat wire twisting machine. Therefore, for the manufacturers of cold heading machines and screw rolling mills, the design of rolling dies is only a matter of design.
Q:Introduction of roll forming process
Roll forming began around 1960s in europe. Because of roll forming, the working model has the advantages of high production efficiency, saving material and increasing product strength.

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