ERW Pipe is the process for producing pipe from continuous coil strip by high frequency electric resistance welding. It is now universally recognised as the most cost effective method of producing quality steel pipe for the available size range. The typical range of sizes for ERW are
Wall thickness - 0.8mm up to 19mm Diameter - 12.7mm up to 660mm
The Seamless Pipe process produces pipe from solid steel round billets by heating to red heat then piercing to create a hollow, followed by rolling through a mandrel or plug mill. The typical rand of sizes for hot finished seamless pipe are -
Wall thickness - 0.8mm up to 60mm Diameter - 8nb upt o 600nb
Spiral Welded Pipe is the process of producing pipe from continuous coil strip formed into a spiral and welded by wire fed Mig. Sub Arc process.
Wall thickness - Ranges from 3mm up to 25mm (governed by steel makers hot roll strip coil capacity)
Sub Arc and Double Submerged Arc Welded Pipe was used for manufacturing large diameter heavy wall pipe prior to the development of the Spiral Welded process.
For further information about Welded & Seamless Carbon Steel Pipe visit Orrcon Operations Pty Ltd at http://www.orrcon.com.au
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