#SEAMLESS PIPE SERIES#

The tube is rotated through 90° for each pass through the plug mill to ensure roundness.Rotation of the rolls reduces the wall thickness.The bloom containing the plug is then passed between the rolls of the plug mill.An internal plug approximately the same diameter as the finished diameter of the pipe is then forced through the bloom.The hole in the hollow shell is enlarged on a rotary elongator, resulting in a short thick-walled tube known as a bloom.An ingot of steel weighing up to two tons is heated to 2,370 ☏ (1,300 ☌) and pierced.This process is used to make larger sizes of seamless pipe, typically 6 to 16 inches (150 to 400 mm) diameter.The pierced billet or hollow tube is then roll reduced (hot or cold) to obtain the prescribed outside diameter and wall thickness. The piercing mill presses the billet against a plug to pierce the billet, and then rolls the billet between rolls and the plug. The round billets are pierced using a cross roll piercer. The round billet is first heated uniformly in the rotary hearth heating furnace and then pierced. Mannesmann Plugmill Process In plug mill process, a solid round billet is used. Mannesmann Plug Mill Pipe Manufacturing Process The pipe is then cut to length before heat treatment, final straightening, inspection, and hydrostatic testing.

After reheating, the pipe is passed through a multi -stand stretch-reducing mill to reduce the diameter to the finished diameter.

#SEAMLESS PIPE SERIES#

Unlike the plug mill, the mandrel mill reduces wall thickness continuously with a series of pairs of curved rollers set at 90° angles to each other.

A mandrel is inserted into the tube and the assembly is passed through a rolling (mandrel) mill.

The ingot of steel is heated to 2,370 ☏ (1,300 ☌) and pierced.

This process is used to make smaller sizes of seamless pipe, typically 1 to 6 inches (25 to 150 mm) diameter.

The tube is then cooled, cut, straightened and subjected to finishing and inspection processes before shipment. The mother tube is reheated and further reduced to specified dimensions by the stretch reducer. The pierced billet or hollow shell is rolled by a mandrel mill to reduce the outside diameter and wall thickness which forms a multiple length mother tube. It is heated in a rotary hearth heating furnace and then pierced by a piercer. Mandrew Mill Process In the Mandrel Mill Process, a solid round (billet) is used.

Mild Steel Pipes Dimensions – IS 1239, IS 3589, IS 4923.

Stainless Steel Pipe Dimensions, ANSI B36.19.

Carbon Steel Seamless Pipe Dimensions, ANSI B36.10.

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Carbon Steel (CS) Pipes Price List – Jindal, ISMT, China.

Seamless pipe