seamless tubing
Quick Summary
Seamless tubing is a manufacturing process that creates hollow tubes without a welded seam. This is achieved by piercing a solid round or bloom of metal, typically steel, at high temperatures.12
The process begins with heating a metal round and then using specialized rolls to create a hollow center. This hollow is then further refined using methods like roll piercing or push piercing, which involve forcing the metal over a mandrel or piercer to form the inner diameter.1
Various rolling technologies are then employed to achieve the desired dimensions and wall thickness. These can include elongator mills to reduce wall thickness and multi-stand mills that use precisely angled rolls to ensure uniform wall thickness. Smaller diameter tubes can be further reduced in size using stretch-reduction mills. This method contrasts with welded tubes, which are formed by shaping a strip of metal and then joining the seam through welding.13
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steelLong productsSeamless tubes are subjected to more demanding service; they are often rolled in diameters ranging from 120 to 400 millimetres and in wall thicknesses up to 15 millimetres, although special rolling mills can often increase the diameter to 650 millimetres. Smaller diameter tubes, both welded…
Read MoreSeamless tubes are subjected to more demanding service; they are often rolled in diameters ranging from 120 to 400 millimetres and in wall thicknesses up to 15 millimetres, although special rolling mills can often increase the diameter to 650 millimetres. Smaller diameter tubes, both welded…
Read More- steelSeamless tubes
Seamless tube rolling always begins by piercing a round or bloom to generate a hollow. In roll piercing, an oval round is preheated to about 1,200° C and is cross-rolled slowly between two short, large-diameter rolls that rotate in the same direction (shown…
Read MoreSeamless tube rolling always begins by piercing a round or bloom to generate a hollow. In roll piercing, an oval round is preheated to about 1,200° C and is cross-rolled slowly between two short, large-diameter rolls that rotate in the same direction (shown…
Read More