Answer / udaya17

seemless tubes are made by stainless steel composites

Answer / murali

made by extrusion of steel billets

Answer / ferozh

they are made by piercing the steel tube and rolling simultaneously, in order to get the hollow tube. they are also produced by cold extrusion techniques.

Answer / souren roy

piercing...

Answer / vijay kumar

Seam less tube are made by piercing and also (extrusion-if long pipe and high pressure required)

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