Techniques of Tube Mills
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Techniques of Tube Mills

May. 26, 2021

Tube mills and pipe mills produce tubes and pipes of various configurations. They serve to deliver a material uncompromised between endpoints. Their shape and materials provides inherent resistance to compressive force, meaning they are optimal for delivering flowable media (e.g. water, gas) through hostile environments without risking contamination. Pipes and tubes are also effective for routing conduits such as wires or rope. Next, the tube mill machine manufacturer will share the following content with you.

 

The integrity of a piping and tubing also makes them key structural elements when manufacutred for that explicit purpose. They are commonly integrated as load-bearing beams, can be used to assemble temporary structures such as scaffolding, are effective as handrails, guardrails, and flag poles, and even earn niche jobs such as a fireman's pole.

Welded Tube Mill

Welded Tube Mill

Welded tube mill line


Welded tube mill in the process of manufacturing square pipes, rectangle pipes with direct shaping and molding technology, combined type rollers are used with pieces structure, roller sleeves are filled between roller pieces, In the deformation region, rollers contact strip steel partially not fully, reducing the contact area and reducing the friction between strip steel and rollers accordingly. As a result, roller consumption is little and the energy consumption of units molding is also reduced remarkably accordingly.


According to users’ needs, the welded tube mill machines can be designed into the multifunctional combination equipments for producing section steel, square pipes and round pipes, realizing one machine with multiple functions.

 

Manufacture

These products are fabricated in tube and pipe mills via welding or seamless technology, depending on the operational requirements. Raw materials are formed into solid round bars known as billets or rectangular steel slabs known as skelps, and are then processed using distinct techniques, such as electric resistance welding (ERW) and submerged arc welding (SAW).

 

The primary methods to manufacture steel pipes and tubes have existed for hundreds of years, but modern mills benefit from advanced monitoring equipment and technologies. Today's producers focus on mill efficiency and product quality, considering important factors such as sizing, hardness, material edging, and tooling.

 

A key objective is eliminating ovality. This is achieved by heating only the edges, which in turn requires a controlled amount of weld power. Other significant challenges include faster line speeds and reduced mill staffing, while also integrating larger ratios lightweight and unconventional materials.

Techniques

Tube mills and pipe mills employ two unique methods that form seamless and welded structures from an extensive selection of materials, both ferrous and nonferrous. Mills are classified according to the nature of the output, technique or materials. For instance, ERW (electric resistance welding) mills rely on the ERW welding, while plasma, LASER and TIG (tungsten inert gasses) mills on autogenous welding.


An array of welding styles enables the production of tubes and pipes, such as:

Fusion welding

Also known as continuous welding, this process starts with coiled steel of a suitable width and thickness. Coils are welded from end-to-end to create a continuous steel ribbon. The ribbon passes through a leveler followed by a gas furnace and is heated to a temperature necessary for forming and fusing. Rolls positioned at the end of the furnace mold the heated skelp into an oval shape. The rolls then firmly press the edges of the skelp to create a weld. At the final sizing stage, rolling equipment molds the pipe to its indicated dimensions.

 

Seamless piping

Pipes and tubes without seams are formed by pushing and pulling a rapidly rotated billet of steel over a mandrel fixed with a piercing point in the middle. Once a hollow shell is made, further finishing is performed until it is correctly sized. The standard seamless design features heavy wall thickness of short lengths and is suitable for coiled, flanged, and threaded treatment. It is an expensive product and exists in a limited supply.

 


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