An electric-welded tube starts with steel strip rather than finished stock. On the line, strip is progressively formed into a round or profiled section, the longitudinal edges are joined by a welded seam, and the tube is then sized and cut to length. The customer receives a product with the agreed section and batch parameters.

This approach is useful when production needs a repeatable tube for a specific product, not simply an available warehouse item. The request can link the profile size to the frame design, surface requirements and subsequent welding, bending or cutting. An AMF technologist checks the parameters before launch and identifies a suitable item in the current production range.

The AMF range includes more than 100 items: round electric-welded tubes, square and rectangular profiles, and oval and flat-oval sections. Available size and wall-thickness combinations depend on the selected item and are confirmed against the current product list when the order is quoted.

You do not have to select the nearest equivalent yourself. Attach an assembly drawing, sample or parts list to the request. We will compare the task with the production range and suggest an option that can be made on the operating line.

AMF tubes are made from cold-rolled steel, selected for products that require a neat surface, controlled profile geometry and suitability for further processing. Such tubes are used in visible furniture frames, retail-equipment uprights, welded structures and serial components.

The steel grade, surface condition and governing standard must match the intended use. If the project requires an electric-welded tube to a particular DSTU standard, include its designation and the designer's requirements in the specification. Production will check whether it applies to the selected section and record the agreed conditions in the order. This verification cannot be replaced by a general statement that the entire range complies with one standard.

These tubes should be treated as structural material. Pipelines, pressure service and special media require separate requirements and supporting documents; such tasks are assessed individually before an order is accepted.

An order can follow either of two schemes. AMF may use its own raw material and supply finished tube, or the customer may provide coil or prepared strip for processing after its compatibility with the line has been checked.

For customer-supplied material, the technologist needs more than the steel grade and thickness. Required data include strip or coil width, coil weight and diameters, surface condition, target section, tube length and batch volume. This information shows whether the material can be formed and how to organise production without unplanned setup changes.

Before launch, the parties agree on input parameters, the expected result, material accounting and packaging. If the coil first needs to be slit, steel strip production can be ordered before it goes to the tube line.

The production route is built around the customer's specification. Each stage has a clear result that can be checked before the next operation.

This sequence simplifies repeat orders: the initial requirements remain linked to the item, while changes to size, length or packaging can be discussed before the next run.

A furniture frame, welded structure and part for further processing each have different critical parameters. Inspection is therefore based on the order requirements rather than an abstract promise of quality.

• Section geometry. Profile shape and agreed dimensions are checked.
• Wall thickness. It is compared with the selected item and source-material documents.
• Welded seam. Its condition is assessed within the accepted production route.
• Straightness and length. These are checked against the intended use and specification.
• Surface. The steel condition is checked, especially when the tube remains visible after assembly.
• Quantity and marking. The batch is prepared so the customer can receive it by item.

If you require a special inspection record, state the measured parameters and document format before quotation. The available checks are agreed separately.

Manufacturer-produced electric-welded tubes are ordered when the section must correspond to a serial part rather than simply match stock availability.

• Furniture production. Table and chair frames, supports, uprights, rails and upholstered-furniture elements.
• Retail and exhibition equipment. Shelving, frames, stands, display structures and mobile racks.
• Metal structures. Welded frames, guards, supports, housings and auxiliary elements.
• Mechanical engineering. Tubular parts that are subsequently cut, welded, drilled or incorporated into an assembly.
• General serial products. Blanks requiring the same section and a pre-agreed length.

State the final application in the request. It helps determine surface, length, end, packaging and downstream-operation requirements.

Tube can be supplied as more than a stock length. When the next operation is already known, it can be included in one production route.

• Cutting tubes into measured blanks — for serial parts of a specified length prepared for welding or assembly.
• Laser tube cutting — for slots, holes and shaped contours made to a program.
• Metalworking — for parts requiring additional operations to an approved drawing after cutting.

The set of operations is confirmed after the drawing is reviewed. This provides a realistic production route without unsupported promises.

Electric-welded tube pricing is based on the specification. Factors include section shape and size, wall thickness, steel grade and volume, length, quantity, material-supply scheme, and inspection, cutting, marking and packaging requirements.

For customer-supplied material, receipt and process compatibility of the coil or strip are assessed separately. For AMF material, current cost and availability are considered. Complete input data reduces the number of clarifications before quotation.

Prepare one specification or table stating for each item:

• section shape and size;
• wall thickness;
• steel grade and required standard, if specified by the designer;
• tube or blank length;
• quantity, total length or batch weight;
• AMF or customer-supplied material;
• surface, end, marking and packaging requirements;
• destination city and requested completion date.

After checking production feasibility, we will clarify any missing parameters and prepare a quotation. Send the specification through the contact form or call +38 (067) 223-11-22.