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SSAW Pipe Mill

Produce spiral welded pipe from steel coil. The mechanical groups include uncoiling and leveling, angled strip feeding, three-roll forming and submerged arc welding.

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SSAW Pipe Mill

SSAW production process

Reference sequence for a spiral submerged arc welded pipe line. The equipment configuration, inspection requirements and test locations are defined for each project.

  1. Coil loading
  2. Uncoiling
  3. Strip levelling
  4. End shearing and butt welding
  5. Rotary shearing
  6. Edge milling
  7. Strip feeding
  8. Prebending and guiding
  9. Spiral forming
  10. Internal submerged arc welding
  11. External submerged arc welding
  12. Cut-off
  13. Pipe extraction
  14. X-ray testing
  15. Hydrostatic testing
  16. End facing and chamfering
  17. Ultrasonic testing
  18. Marking
  19. Storage

Selection & site conditions

Provide feedstock grade and size, target product specification, output, site layout and available utilities for model and supply-scope selection.

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Frequently asked questions

Practical answers about selecting equipment and preparing a project. Open a question to read the details.

What information is needed for a useful quotation?

Start with the material grade and applicable standards, incoming and finished thickness and width, coil weight and diameters, or tube and section sizes. Add the product mix, annual tonnage, dimensional tolerances, surface requirements and the intended application. A sample product table is more useful than a single maximum size.

Also state the project location, available workshop space, existing equipment, utilities and target start-up date. Mark undecided items as TBD; PRC can discuss selection assumptions before the technical scope is fixed. A budget range is optional. Final technical and commercial terms are confirmed in the project documents.

Can all published maximum specifications be achieved together?

Not necessarily. A product-family range is not a guarantee that maximum width, thickness, strength, speed and annual output can all be reached at the same time. The feasible operating window depends on the material, product mix, equipment configuration and process conditions.

Annual capacity must account for the pass schedule or line speed, operating hours, coil changes, maintenance and product yield. Thickness tolerance, flatness, coating quality and energy figures require defined measurement and acceptance conditions. Confirm the configuration and test product matrix with PRC rather than combining limits from different models or routes.

What is included in a complete-line project?

The scope may include process and equipment selection, main and auxiliary equipment, electrical systems, automation, interface documents, installation supervision, commissioning and operator training. A complete-line contract does not automatically mean responsibility for the entire factory or every building service.

The technical agreement should identify who supplies foundations, buildings, cranes, external utilities, installation labour, test materials and local approvals. It should also define drawings, deliverables, performance tests, spare parts and service responsibilities. PRC also discusses individual equipment supply and revamps where a complete line is not required.

What site conditions and utilities should the customer prepare?

Prepare the workshop dimensions, floor levels, crane capacity, access and logistics, existing foundations and maintenance clearances. Provide the available electrical supply, cooling water, compressed air, ventilation and any process-specific media relevant to the chosen equipment.

Foundation loads, connection points, supply quality and flow requirements must come from the selected design; generic consumption figures should not be used as construction data. Coordinate material storage, coil handling, emergency access and the boundary between supplier and customer works. Local safety, environmental and construction requirements also need to be considered for the project location.

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