Manufacture of stainless electric welded pipes

Technology

Production of stainless

Electric welded pipes

Includes:

• Preparation of stainless sheet for welding;
• Sheet twisting;
• Welding of the edges of the pipe billet;
• Reduction / calibration of finished pipes;
• Cutting of finished pipes into lengths;
• Finishing and quality control of pipes.

When choosing

The method of forming and welding are taken into account

Diameter of stainless electrowelded

Pipes and purpose.

On

Pipes of small and medium-sized diameters are

Roll blank with forming in

Continuous mill. With continuous

Gradual folding

Strip gives a cylindrical tube

Blank for straight pipe with straight

Linear joint. This operation

Produce in a cold state. FROM

Pre-welding ends of rolls

Continuous molding goes on in an infinite

Mode. When forming a strip in

Spiral forming machines, seam

The pipe will be spiraling. For

Electric welding of the edges of pipe blanks

Stainless steel fit two

Method: permanent contact welding

Current by the resistance method and

High-frequency electric welding. AND

The one and the other way refer to the form

Pressure welding.

Pressure welding has

Two stages: the first warm up the edge

Heat of the pipe billet

Electric current; On the second — they compress

Edges and bring to a joint plastic

Deformation — this is welding.