We are a method used for production of Longitudinal welded pipes. Longitudinal edges of steel plates are first beveled using carbide milling equipment. Beveled plates are then formed into a U shape using a U-press and subsequently into an O shape using an O-press.
Longitudinal edges of the plates are then tack welded followed by internal and external welds.
Pipes manufactured by this process are subjected to expanding operation in order to relieve internal stresses and obtain a perfect dimensional tolerance.
After the Longitudinal welded pipes are conveyed to cold expansion, hydrostatic testing and NDT inspection, the Longitudinal welded pipes will be subject to final inspection for the compliance to customer requirements.
Starting from incoming control up to the final inspection stage; entire process is monitored and supported by computerized system. Traceability is achieved by input controls and barcodes through entire production lines.
Application Areas
Longitudinal welded pipes are used in onshore and offshore oil and gas pipelines requiring critical service, high performance and tight tolerances. LSAW steel pipes are also used in conveyance of flammable & nonflammable liquids, and as structural members in construction projects.
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